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v1.4.0
tests/paramgrill.c
2 966 строк
101 KB
Josh Soref
Spelling (#1582)
12 апр 2019, 21:18
12 апр 2019, 21:18
a880ca2
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/* * Copyright (c) 2015-present, Yann Collet, Facebook, Inc. * All rights reserved. * * This source code is licensed under both the BSD-style license (found in the * LICENSE file in the root directory of this source tree) and the GPLv2 (found * in the COPYING file in the root directory of this source tree). * You may select, at your option, one of the above-listed licenses. */ /*-************************************ * Dependencies **************************************/ #include "util.h" /* Ensure platform.h is compiled first; also : compiler options, UTIL_GetFileSize */ #include <stdlib.h> /* malloc */ #include <stdio.h> /* fprintf, fopen, ftello64 */ #include <string.h> /* strcmp */ #include <math.h> /* log */ #include <assert.h> #include "timefn.h" /* SEC_TO_MICRO, UTIL_time_t, UTIL_clockSpanMicro, UTIL_clockSpanNano, UTIL_getTime */ #include "mem.h" #define ZSTD_STATIC_LINKING_ONLY /* ZSTD_parameters, ZSTD_estimateCCtxSize */ #include "zstd.h" #include "datagen.h" #include "xxhash.h" #include "benchfn.h" #include "benchzstd.h" #include "zstd_errors.h" #include "zstd_internal.h" /* should not be needed */ /*-************************************ * Constants **************************************/ #define PROGRAM_DESCRIPTION "ZSTD parameters tester" #define AUTHOR "Yann Collet" #define WELCOME_MESSAGE "*** %s %s %i-bits, by %s ***\n", PROGRAM_DESCRIPTION, ZSTD_VERSION_STRING, (int)(sizeof(void*)*8), AUTHOR #define TIMELOOP_NANOSEC (1*1000000000ULL) /* 1 second */ #define NB_LEVELS_TRACKED 22 /* ensured being >= ZSTD_maxCLevel() in BMK_init_level_constraints() */ static const size_t maxMemory = (sizeof(size_t)==4) ? (2 GB - 64 MB) : (size_t)(1ULL << ((sizeof(size_t)*8)-31)); #define COMPRESSIBILITY_DEFAULT 0.50 static const U64 g_maxVariationTime = 60 * SEC_TO_MICRO; static const int g_maxNbVariations = 64; /*-************************************ * Macros **************************************/ #define DISPLAY(...) fprintf(stderr, __VA_ARGS__) #define DISPLAYLEVEL(n, ...) if(g_displayLevel >= n) { fprintf(stderr, __VA_ARGS__); } #define DEBUGOUTPUT(...) { if (DEBUG) DISPLAY(__VA_ARGS__); } #define TIMED 0 #ifndef DEBUG # define DEBUG 0 #endif #undef MIN #undef MAX #define MIN(a,b) ( (a) < (b) ? (a) : (b) ) #define MAX(a,b) ( (a) > (b) ? (a) : (b) ) #define CUSTOM_LEVEL 99 #define BASE_CLEVEL 1 #define FADT_MIN 0 #define FADT_MAX ((U32)-1) #define WLOG_RANGE (ZSTD_WINDOWLOG_MAX - ZSTD_WINDOWLOG_MIN + 1) #define CLOG_RANGE (ZSTD_CHAINLOG_MAX - ZSTD_CHAINLOG_MIN + 1) #define HLOG_RANGE (ZSTD_HASHLOG_MAX - ZSTD_HASHLOG_MIN + 1) #define SLOG_RANGE (ZSTD_SEARCHLOG_MAX - ZSTD_SEARCHLOG_MIN + 1) #define MML_RANGE (ZSTD_MINMATCH_MAX - ZSTD_MINMATCH_MIN + 1) #define TLEN_RANGE 17 #define STRT_RANGE (ZSTD_STRATEGY_MAX - ZSTD_STRATEGY_MIN + 1) #define FADT_RANGE 3 #define CHECKTIME(r) { if(BMK_timeSpan_s(g_time) > g_timeLimit_s) { DEBUGOUTPUT("Time Limit Reached\n"); return r; } } #define CHECKTIMEGT(ret, val, _gototag) { if(BMK_timeSpan_s(g_time) > g_timeLimit_s) { DEBUGOUTPUT("Time Limit Reached\n"); ret = val; goto _gototag; } } #define PARAM_UNSET ((U32)-2) /* can't be -1 b/c fadt uses -1 */ static const char* g_stratName[ZSTD_STRATEGY_MAX+1] = { "(none) ", "ZSTD_fast ", "ZSTD_dfast ", "ZSTD_greedy ", "ZSTD_lazy ", "ZSTD_lazy2 ", "ZSTD_btlazy2 ", "ZSTD_btopt ", "ZSTD_btultra ", "ZSTD_btultra2"}; static const U32 tlen_table[TLEN_RANGE] = { 0, 1, 2, 4, 6, 8, 12, 16, 24, 32, 48, 64, 96, 128, 256, 512, 999 }; /*-************************************ * Setup for Adding new params **************************************/ /* indices for each of the variables */ typedef enum { wlog_ind = 0, clog_ind = 1, hlog_ind = 2, slog_ind = 3, mml_ind = 4, tlen_ind = 5, strt_ind = 6, fadt_ind = 7, /* forceAttachDict */ NUM_PARAMS = 8 } varInds_t; typedef struct { U32 vals[NUM_PARAMS]; } paramValues_t; /* minimum value of parameters */ static const U32 mintable[NUM_PARAMS] = { ZSTD_WINDOWLOG_MIN, ZSTD_CHAINLOG_MIN, ZSTD_HASHLOG_MIN, ZSTD_SEARCHLOG_MIN, ZSTD_MINMATCH_MIN, ZSTD_TARGETLENGTH_MIN, ZSTD_STRATEGY_MIN, FADT_MIN }; /* maximum value of parameters */ static const U32 maxtable[NUM_PARAMS] = { ZSTD_WINDOWLOG_MAX, ZSTD_CHAINLOG_MAX, ZSTD_HASHLOG_MAX, ZSTD_SEARCHLOG_MAX, ZSTD_MINMATCH_MAX, ZSTD_TARGETLENGTH_MAX, ZSTD_STRATEGY_MAX, FADT_MAX }; /* # of values parameters can take on */ static const U32 rangetable[NUM_PARAMS] = { WLOG_RANGE, CLOG_RANGE, HLOG_RANGE, SLOG_RANGE, MML_RANGE, TLEN_RANGE, STRT_RANGE, FADT_RANGE }; /* ZSTD_cctxSetParameter() index to set */ static const ZSTD_cParameter cctxSetParamTable[NUM_PARAMS] = { ZSTD_c_windowLog, ZSTD_c_chainLog, ZSTD_c_hashLog, ZSTD_c_searchLog, ZSTD_c_minMatch, ZSTD_c_targetLength, ZSTD_c_strategy, ZSTD_c_forceAttachDict }; /* names of parameters */ static const char* g_paramNames[NUM_PARAMS] = { "windowLog", "chainLog", "hashLog","searchLog", "minMatch", "targetLength", "strategy", "forceAttachDict" }; /* shortened names of parameters */ static const char* g_shortParamNames[NUM_PARAMS] = { "wlog", "clog", "hlog", "slog", "mml", "tlen", "strat", "fadt" }; /* maps value from { 0 to rangetable[param] - 1 } to valid paramvalues */ static U32 rangeMap(varInds_t param, int ind) { U32 const uind = (U32)MAX(MIN(ind, (int)rangetable[param] - 1), 0); switch(param) { case wlog_ind: /* using default: triggers -Wswitch-enum */ case clog_ind: case hlog_ind: case slog_ind: case mml_ind: case strt_ind: return mintable[param] + uind; case tlen_ind: return tlen_table[uind]; case fadt_ind: /* 0, 1, 2 -> -1, 0, 1 */ return uind - 1; case NUM_PARAMS: default:; } DISPLAY("Error, not a valid param\n "); assert(0); return (U32)-1; } /* inverse of rangeMap */ static int invRangeMap(varInds_t param, U32 value) { value = MIN(MAX(mintable[param], value), maxtable[param]); switch(param) { case wlog_ind: case clog_ind: case hlog_ind: case slog_ind: case mml_ind: case strt_ind: return (int)(value - mintable[param]); case tlen_ind: /* bin search */ { int lo = 0; int hi = TLEN_RANGE; while(lo < hi) { int mid = (lo + hi) / 2; if(tlen_table[mid] < value) { lo = mid + 1; } if(tlen_table[mid] == value) { return mid; } else { hi = mid; } } return lo; } case fadt_ind: return (int)value + 1; case NUM_PARAMS: default:; } DISPLAY("Error, not a valid param\n "); assert(0); return -2; } /* display of params */ static void displayParamVal(FILE* f, varInds_t param, unsigned value, int width) { switch(param) { case wlog_ind: case clog_ind: case hlog_ind: case slog_ind: case mml_ind: case tlen_ind: if(width) { fprintf(f, "%*u", width, value); } else { fprintf(f, "%u", value); } break; case strt_ind: if(width) { fprintf(f, "%*s", width, g_stratName[value]); } else { fprintf(f, "%s", g_stratName[value]); } break; case fadt_ind: /* force attach dict */ if(width) { fprintf(f, "%*d", width, (int)value); } else { fprintf(f, "%d", (int)value); } break; case NUM_PARAMS: default: DISPLAY("Error, not a valid param\n "); assert(0); break; } } /*-************************************ * Benchmark Parameters/Global Variables **************************************/ /* General Utility */ static U32 g_timeLimit_s = 99999; /* about 27 hours */ static UTIL_time_t g_time; /* to be used to compare solution finding speeds to compare to original */ static U32 g_blockSize = 0; static U32 g_rand = 1; /* Display */ static int g_displayLevel = 3; static BYTE g_silenceParams[NUM_PARAMS]; /* can selectively silence some params when displaying them */ /* Mode Selection */ static U32 g_singleRun = 0; static U32 g_optimizer = 0; static int g_optmode = 0; /* For cLevel Table generation */ static U32 g_target = 0; static U32 g_noSeed = 0; /* For optimizer */ static paramValues_t g_params; /* Initialized at the beginning of main w/ emptyParams() function */ static double g_ratioMultiplier = 5.; static U32 g_strictness = PARAM_UNSET; /* range 1 - 100, measure of how strict */ static BMK_benchResult_t g_lvltarget; typedef enum { directMap, xxhashMap, noMemo } memoTableType_t; typedef struct { memoTableType_t tableType; BYTE* table; size_t tableLen; varInds_t varArray[NUM_PARAMS]; size_t varLen; } memoTable_t; typedef struct { BMK_benchResult_t result; paramValues_t params; } winnerInfo_t; typedef struct { U32 cSpeed; /* bytes / sec */ U32 dSpeed; U32 cMem; /* bytes */ } constraint_t; typedef struct winner_ll_node winner_ll_node; struct winner_ll_node { winnerInfo_t res; winner_ll_node* next; }; static winner_ll_node* g_winners; /* linked list sorted ascending by cSize & cSpeed */ /* * Additional Global Variables (Defined Above Use) * g_level_constraint * g_alreadyTested * g_maxTries * g_clockGranularity */ /*-******************************************************* * General Util Functions *********************************************************/ /* nullified useless params, to ensure count stats */ /* cleans up params for memoizing / display */ static paramValues_t sanitizeParams(paramValues_t params) { if (params.vals[strt_ind] == ZSTD_fast) params.vals[clog_ind] = 0, params.vals[slog_ind] = 0; if (params.vals[strt_ind] == ZSTD_dfast) params.vals[slog_ind] = 0; if ( (params.vals[strt_ind] < ZSTD_btopt) && (params.vals[strt_ind] != ZSTD_fast) ) params.vals[tlen_ind] = 0; return params; } static ZSTD_compressionParameters pvalsToCParams(paramValues_t p) { ZSTD_compressionParameters c; memset(&c, 0, sizeof(ZSTD_compressionParameters)); c.windowLog = p.vals[wlog_ind]; c.chainLog = p.vals[clog_ind]; c.hashLog = p.vals[hlog_ind]; c.searchLog = p.vals[slog_ind]; c.minMatch = p.vals[mml_ind]; c.targetLength = p.vals[tlen_ind]; c.strategy = p.vals[strt_ind]; /* no forceAttachDict */ return c; } static paramValues_t cParamsToPVals(ZSTD_compressionParameters c) { paramValues_t p; varInds_t i; p.vals[wlog_ind] = c.windowLog; p.vals[clog_ind] = c.chainLog; p.vals[hlog_ind] = c.hashLog; p.vals[slog_ind] = c.searchLog; p.vals[mml_ind] = c.minMatch; p.vals[tlen_ind] = c.targetLength; p.vals[strt_ind] = c.strategy; /* set all other params to their minimum value */ for (i = strt_ind + 1; i < NUM_PARAMS; i++) { p.vals[i] = mintable[i]; } return p; } /* equivalent of ZSTD_adjustCParams for paramValues_t */ static paramValues_t adjustParams(paramValues_t p, const size_t maxBlockSize, const size_t dictSize) { paramValues_t ot = p; varInds_t i; p = cParamsToPVals(ZSTD_adjustCParams(pvalsToCParams(p), maxBlockSize, dictSize)); if (!dictSize) { p.vals[fadt_ind] = 0; } /* retain value of all other parameters */ for(i = strt_ind + 1; i < NUM_PARAMS; i++) { p.vals[i] = ot.vals[i]; } return p; } static size_t BMK_findMaxMem(U64 requiredMem) { size_t const step = 64 MB; void* testmem = NULL; requiredMem = (((requiredMem >> 26) + 1) << 26); if (requiredMem > maxMemory) requiredMem = maxMemory; requiredMem += 2 * step; while (!testmem && requiredMem > 0) { testmem = malloc ((size_t)requiredMem); requiredMem -= step; } free (testmem); return (size_t) requiredMem; } /* accuracy in seconds only, span can be multiple years */ static U32 BMK_timeSpan_s(const UTIL_time_t tStart) { return (U32)(UTIL_clockSpanMicro(tStart) / 1000000ULL); } static U32 FUZ_rotl32(U32 x, U32 r) { return ((x << r) | (x >> (32 - r))); } static U32 FUZ_rand(U32* src) { const U32 prime1 = 2654435761U; const U32 prime2 = 2246822519U; U32 rand32 = *src; rand32 *= prime1; rand32 += prime2; rand32 = FUZ_rotl32(rand32, 13); *src = rand32; return rand32 >> 5; } #define BOUNDCHECK(val,min,max) { \ if (((val)<(min)) | ((val)>(max))) { \ DISPLAY("INVALID PARAMETER CONSTRAINTS\n"); \ return 0; \ } } static int paramValid(const paramValues_t paramTarget) { U32 i; for(i = 0; i < NUM_PARAMS; i++) { BOUNDCHECK(paramTarget.vals[i], mintable[i], maxtable[i]); } return 1; } /* cParamUnsetMin() : * if any parameter in paramTarget is not yet set, * it will receive its corresponding minimal value. * This function never fails */ static paramValues_t cParamUnsetMin(paramValues_t paramTarget) { varInds_t vi; for (vi = 0; vi < NUM_PARAMS; vi++) { if (paramTarget.vals[vi] == PARAM_UNSET) { paramTarget.vals[vi] = mintable[vi]; } } return paramTarget; } static paramValues_t emptyParams(void) { U32 i; paramValues_t p; for(i = 0; i < NUM_PARAMS; i++) { p.vals[i] = PARAM_UNSET; } return p; } static winnerInfo_t initWinnerInfo(const paramValues_t p) { winnerInfo_t w1; w1.result.cSpeed = 0.; w1.result.dSpeed = 0.; w1.result.cMem = (size_t)-1; w1.result.cSize = (size_t)-1; w1.params = p; return w1; } static paramValues_t overwriteParams(paramValues_t base, const paramValues_t mask) { U32 i; for(i = 0; i < NUM_PARAMS; i++) { if(mask.vals[i] != PARAM_UNSET) { base.vals[i] = mask.vals[i]; } } return base; } static void paramVaryOnce(const varInds_t paramIndex, const int amt, paramValues_t* ptr) { ptr->vals[paramIndex] = rangeMap(paramIndex, invRangeMap(paramIndex, ptr->vals[paramIndex]) + amt); } /* varies ptr by nbChanges respecting varyParams*/ static void paramVariation(paramValues_t* ptr, memoTable_t* mtAll, const U32 nbChanges) { paramValues_t p; int validated = 0; while (!validated) { U32 i; p = *ptr; for (i = 0 ; i < nbChanges ; i++) { const U32 changeID = (U32)FUZ_rand(&g_rand) % (mtAll[p.vals[strt_ind]].varLen << 1); paramVaryOnce(mtAll[p.vals[strt_ind]].varArray[changeID >> 1], (int)((changeID & 1) << 1) - 1, &p); } validated = paramValid(p); } *ptr = p; } /* Completely random parameter selection */ static paramValues_t randomParams(void) { varInds_t v; paramValues_t p; for(v = 0; v < NUM_PARAMS; v++) { p.vals[v] = rangeMap(v, (int)(FUZ_rand(&g_rand) % rangetable[v])); } return p; } static U64 g_clockGranularity = 100000000ULL; static void init_clockGranularity(void) { UTIL_time_t const clockStart = UTIL_getTime(); U64 el1 = 0, el2 = 0; int i = 0; do { el1 = el2; el2 = UTIL_clockSpanNano(clockStart); if(el1 < el2) { U64 iv = el2 - el1; if(g_clockGranularity > iv) { g_clockGranularity = iv; i = 0; } else { i++; } } } while(i < 10); DEBUGOUTPUT("Granularity: %llu\n", (unsigned long long)g_clockGranularity); } /*-************************************ * Optimizer Util Functions **************************************/ /* checks results are feasible */ static int feasible(const BMK_benchResult_t results, const constraint_t target) { return (results.cSpeed >= target.cSpeed) && (results.dSpeed >= target.dSpeed) && (results.cMem <= target.cMem) && (!g_optmode || results.cSize <= g_lvltarget.cSize); } /* hill climbing value for part 1 */ /* Scoring here is a linear reward for all set constraints normalized between 0 to 1 * (with 0 at 0 and 1 being fully fulfilling the constraint), summed with a logarithmic * bonus to exceeding the constraint value. We also give linear ratio for compression ratio. * The constant factors are experimental. */ static double resultScore(const BMK_benchResult_t res, const size_t srcSize, const constraint_t target) { double cs = 0., ds = 0., rt, cm = 0.; const double r1 = 1, r2 = 0.1, rtr = 0.5; double ret; if(target.cSpeed) { cs = res.cSpeed / (double)target.cSpeed; } if(target.dSpeed) { ds = res.dSpeed / (double)target.dSpeed; } if(target.cMem != (U32)-1) { cm = (double)target.cMem / res.cMem; } rt = ((double)srcSize / res.cSize); ret = (MIN(1, cs) + MIN(1, ds) + MIN(1, cm))*r1 + rt * rtr + (MAX(0, log(cs))+ MAX(0, log(ds))+ MAX(0, log(cm))) * r2; return ret; } /* calculates normalized squared euclidean distance of result1 if it is in the first quadrant relative to lvlRes */ static double resultDistLvl(const BMK_benchResult_t result1, const BMK_benchResult_t lvlRes) { double normalizedCSpeedGain1 = (result1.cSpeed / lvlRes.cSpeed) - 1; double normalizedRatioGain1 = ((double)lvlRes.cSize / result1.cSize) - 1; if(normalizedRatioGain1 < 0 || normalizedCSpeedGain1 < 0) { return 0.0; } return normalizedRatioGain1 * g_ratioMultiplier + normalizedCSpeedGain1; } /* return true if r2 strictly better than r1 */ static int compareResultLT(const BMK_benchResult_t result1, const BMK_benchResult_t result2, const constraint_t target, size_t srcSize) { if(feasible(result1, target) && feasible(result2, target)) { if(g_optmode) { return resultDistLvl(result1, g_lvltarget) < resultDistLvl(result2, g_lvltarget); } else { return (result1.cSize > result2.cSize) || (result1.cSize == result2.cSize && result2.cSpeed > result1.cSpeed) || (result1.cSize == result2.cSize && result2.cSpeed == result1.cSpeed && result2.dSpeed > result1.dSpeed); } } return feasible(result2, target) || (!feasible(result1, target) && (resultScore(result1, srcSize, target) < resultScore(result2, srcSize, target))); } static constraint_t relaxTarget(constraint_t target) { target.cMem = (U32)-1; target.cSpeed *= ((double)g_strictness) / 100; target.dSpeed *= ((double)g_strictness) / 100; return target; } static void optimizerAdjustInput(paramValues_t* pc, const size_t maxBlockSize) { varInds_t v; for(v = 0; v < NUM_PARAMS; v++) { if(pc->vals[v] != PARAM_UNSET) { U32 newval = MIN(MAX(pc->vals[v], mintable[v]), maxtable[v]); if(newval != pc->vals[v]) { pc->vals[v] = newval; DISPLAY("Warning: parameter %s not in valid range, adjusting to ", g_paramNames[v]); displayParamVal(stderr, v, newval, 0); DISPLAY("\n"); } } } if(pc->vals[wlog_ind] != PARAM_UNSET) { U32 sshb = maxBlockSize > 1 ? ZSTD_highbit32((U32)(maxBlockSize-1)) + 1 : 1; /* edge case of highBit not working for 0 */ if(maxBlockSize < (1ULL << 31) && sshb + 1 < pc->vals[wlog_ind]) { U32 adjust = MAX(mintable[wlog_ind], sshb); if(adjust != pc->vals[wlog_ind]) { pc->vals[wlog_ind] = adjust; DISPLAY("Warning: windowLog larger than src/block size, adjusted to %u\n", (unsigned)pc->vals[wlog_ind]); } } } if(pc->vals[wlog_ind] != PARAM_UNSET && pc->vals[clog_ind] != PARAM_UNSET) { U32 maxclog; if(pc->vals[strt_ind] == PARAM_UNSET || pc->vals[strt_ind] >= (U32)ZSTD_btlazy2) { maxclog = pc->vals[wlog_ind] + 1; } else { maxclog = pc->vals[wlog_ind]; } if(pc->vals[clog_ind] > maxclog) { pc->vals[clog_ind] = maxclog; DISPLAY("Warning: chainlog too much larger than windowLog size, adjusted to %u\n", (unsigned)pc->vals[clog_ind]); } } if(pc->vals[wlog_ind] != PARAM_UNSET && pc->vals[hlog_ind] != PARAM_UNSET) { if(pc->vals[wlog_ind] + 1 < pc->vals[hlog_ind]) { pc->vals[hlog_ind] = pc->vals[wlog_ind] + 1; DISPLAY("Warning: hashlog too much larger than windowLog size, adjusted to %u\n", (unsigned)pc->vals[hlog_ind]); } } if(pc->vals[slog_ind] != PARAM_UNSET && pc->vals[clog_ind] != PARAM_UNSET) { if(pc->vals[slog_ind] > pc->vals[clog_ind]) { pc->vals[clog_ind] = pc->vals[slog_ind]; DISPLAY("Warning: searchLog larger than chainLog, adjusted to %u\n", (unsigned)pc->vals[slog_ind]); } } } static int redundantParams(const paramValues_t paramValues, const constraint_t target, const size_t maxBlockSize) { return (ZSTD_estimateCStreamSize_usingCParams(pvalsToCParams(paramValues)) > (size_t)target.cMem) /* Uses too much memory */ || ((1ULL << (paramValues.vals[wlog_ind] - 1)) >= maxBlockSize && paramValues.vals[wlog_ind] != mintable[wlog_ind]) /* wlog too much bigger than src size */ || (paramValues.vals[clog_ind] > (paramValues.vals[wlog_ind] + (paramValues.vals[strt_ind] > ZSTD_btlazy2))) /* chainLog larger than windowLog*/ || (paramValues.vals[slog_ind] > paramValues.vals[clog_ind]) /* searchLog larger than chainLog */ || (paramValues.vals[hlog_ind] > paramValues.vals[wlog_ind] + 1); /* hashLog larger than windowLog + 1 */ } /*-************************************ * Display Functions **************************************/ /* BMK_paramValues_into_commandLine() : * transform a set of parameters paramValues_t * into a command line compatible with `zstd` syntax * and writes it into FILE* f. * f must be already opened and writable */ static void BMK_paramValues_into_commandLine(FILE* f, const paramValues_t params) { varInds_t v; int first = 1; fprintf(f,"--zstd="); for (v = 0; v < NUM_PARAMS; v++) { if (g_silenceParams[v]) { continue; } if (!first) { fprintf(f, ","); } fprintf(f,"%s=", g_paramNames[v]); if (v == strt_ind) { fprintf(f,"%u", (unsigned)params.vals[v]); } else { displayParamVal(f, v, params.vals[v], 0); } first = 0; } fprintf(f, "\n"); } /* comparison function: */ /* strictly better, strictly worse, equal, speed-side adv, size-side adv */ #define WORSE_RESULT 0 #define BETTER_RESULT 1 #define ERROR_RESULT 2 #define SPEED_RESULT 4 #define SIZE_RESULT 5 /* maybe have epsilon-eq to limit table size? */ static int speedSizeCompare(const BMK_benchResult_t r1, const BMK_benchResult_t r2) { if(r1.cSpeed < r2.cSpeed) { if(r1.cSize >= r2.cSize) { return BETTER_RESULT; } return SPEED_RESULT; /* r2 is smaller but not faster. */ } else { if(r1.cSize <= r2.cSize) { return WORSE_RESULT; } return SIZE_RESULT; /* r2 is faster but not smaller */ } } /* 0 for insertion, 1 for no insert */ /* maintain invariant speedSizeCompare(n, n->next) = SPEED_RESULT */ static int insertWinner(const winnerInfo_t w, const constraint_t targetConstraints) { BMK_benchResult_t r = w.result; winner_ll_node* cur_node = g_winners; /* first node to insert */ if(!feasible(r, targetConstraints)) { return 1; } if(g_winners == NULL) { winner_ll_node* first_node = malloc(sizeof(winner_ll_node)); if(first_node == NULL) { return 1; } first_node->next = NULL; first_node->res = w; g_winners = first_node; return 0; } while(cur_node->next != NULL) { switch(speedSizeCompare(cur_node->res.result, r)) { case WORSE_RESULT: { return 1; /* never insert if better */ } case BETTER_RESULT: { winner_ll_node* tmp; cur_node->res = cur_node->next->res; tmp = cur_node->next; cur_node->next = cur_node->next->next; free(tmp); break; } case SIZE_RESULT: { cur_node = cur_node->next; break; } case SPEED_RESULT: /* insert after first size result, then return */ { winner_ll_node* newnode = malloc(sizeof(winner_ll_node)); if(newnode == NULL) { return 1; } newnode->res = cur_node->res; cur_node->res = w; newnode->next = cur_node->next; cur_node->next = newnode; return 0; } } } assert(cur_node->next == NULL); switch(speedSizeCompare(cur_node->res.result, r)) { case WORSE_RESULT: { return 1; /* never insert if better */ } case BETTER_RESULT: { cur_node->res = w; return 0; } case SIZE_RESULT: { winner_ll_node* newnode = malloc(sizeof(winner_ll_node)); if(newnode == NULL) { return 1; } newnode->res = w; newnode->next = NULL; cur_node->next = newnode; return 0; } case SPEED_RESULT: /* insert before first size result, then return */ { winner_ll_node* newnode = malloc(sizeof(winner_ll_node)); if(newnode == NULL) { return 1; } newnode->res = cur_node->res; cur_node->res = w; newnode->next = cur_node->next; cur_node->next = newnode; return 0; } default: return 1; } } static void BMK_displayOneResult(FILE* f, winnerInfo_t res, const size_t srcSize) { varInds_t v; int first = 1; res.params = cParamUnsetMin(res.params); fprintf(f, " {"); for (v = 0; v < NUM_PARAMS; v++) { if (g_silenceParams[v]) { continue; } if (!first) { fprintf(f, ","); } displayParamVal(f, v, res.params.vals[v], 3); first = 0; } { double const ratio = res.result.cSize ? (double)srcSize / res.result.cSize : 0; double const cSpeedMBps = (double)res.result.cSpeed / MB_UNIT; double const dSpeedMBps = (double)res.result.dSpeed / MB_UNIT; fprintf(f, " }, /* R:%5.3f at %5.1f MB/s - %5.1f MB/s */\n", ratio, cSpeedMBps, dSpeedMBps); } } /* Writes to f the results of a parameter benchmark */ /* when used with --optimize, will only print results better than previously discovered */ static void BMK_printWinner(FILE* f, const int cLevel, const BMK_benchResult_t result, const paramValues_t params, const size_t srcSize) { char lvlstr[15] = "Custom Level"; winnerInfo_t w; w.params = params; w.result = result; fprintf(f, "\r%79s\r", ""); if(cLevel != CUSTOM_LEVEL) { snprintf(lvlstr, 15, " Level %2d ", cLevel); } if(TIMED) { const U64 mn_in_ns = 60ULL * TIMELOOP_NANOSEC; const U64 time_ns = UTIL_clockSpanNano(g_time); const U64 minutes = time_ns / mn_in_ns; fprintf(f, "%1lu:%2lu:%05.2f - ", (unsigned long) minutes / 60, (unsigned long) minutes % 60, (double)(time_ns - (minutes * mn_in_ns)) / TIMELOOP_NANOSEC ); } fprintf(f, "/* %s */ ", lvlstr); BMK_displayOneResult(f, w, srcSize); } static void BMK_printWinnerOpt(FILE* f, const U32 cLevel, const BMK_benchResult_t result, const paramValues_t params, const constraint_t targetConstraints, const size_t srcSize) { /* global winner used for constraints */ /* cSize, cSpeed, dSpeed, cMem */ static winnerInfo_t g_winner = { { (size_t)-1LL, 0, 0, (size_t)-1LL }, { { PARAM_UNSET, PARAM_UNSET, PARAM_UNSET, PARAM_UNSET, PARAM_UNSET, PARAM_UNSET, PARAM_UNSET, PARAM_UNSET } } }; if ( DEBUG || compareResultLT(g_winner.result, result, targetConstraints, srcSize) || g_displayLevel >= 4) { if ( DEBUG && compareResultLT(g_winner.result, result, targetConstraints, srcSize)) { DISPLAY("New Winner: \n"); } if(g_displayLevel >= 2) { BMK_printWinner(f, cLevel, result, params, srcSize); } if(compareResultLT(g_winner.result, result, targetConstraints, srcSize)) { if(g_displayLevel >= 1) { BMK_paramValues_into_commandLine(f, params); } g_winner.result = result; g_winner.params = params; } } if(g_optmode && g_optimizer && (DEBUG || g_displayLevel == 3)) { winnerInfo_t w; winner_ll_node* n; w.result = result; w.params = params; insertWinner(w, targetConstraints); if(!DEBUG) { fprintf(f, "\033c"); } fprintf(f, "\n"); /* the table */ fprintf(f, "================================\n"); for(n = g_winners; n != NULL; n = n->next) { BMK_displayOneResult(f, n->res, srcSize); } fprintf(f, "================================\n"); fprintf(f, "Level Bounds: R: > %.3f AND C: < %.1f MB/s \n\n", (double)srcSize / g_lvltarget.cSize, (double)g_lvltarget.cSpeed / MB_UNIT); fprintf(f, "Overall Winner: \n"); BMK_displayOneResult(f, g_winner, srcSize); BMK_paramValues_into_commandLine(f, g_winner.params); fprintf(f, "Latest BMK: \n");\ BMK_displayOneResult(f, w, srcSize); } } /* BMK_print_cLevelEntry() : * Writes one cLevelTable entry, for one level. * f must exist, be already opened, and be seekable. * this function cannot error. */ static void BMK_print_cLevelEntry(FILE* f, const int cLevel, paramValues_t params, const BMK_benchResult_t result, const size_t srcSize) { varInds_t v; int first = 1; assert(cLevel >= 0); assert(cLevel <= NB_LEVELS_TRACKED); params = cParamUnsetMin(params); fprintf(f, " {"); /* print cParams. * assumption : all cParams are present and in order in the following range */ for (v = 0; v <= strt_ind; v++) { if (!first) { fprintf(f, ","); } displayParamVal(f, v, params.vals[v], 3); first = 0; } /* print comment */ { double const ratio = result.cSize ? (double)srcSize / result.cSize : 0; double const cSpeedMBps = (double)result.cSpeed / MB_UNIT; double const dSpeedMBps = (double)result.dSpeed / MB_UNIT; fprintf(f, " }, /* level %2i: R=%5.3f at %5.1f MB/s - %5.1f MB/s */\n", cLevel, ratio, cSpeedMBps, dSpeedMBps); } } /* BMK_print_cLevelTable() : * print candidate compression table into proposed FILE* f. * f must exist, be already opened, and be seekable. * winners must be a table of NB_LEVELS_TRACKED+1 elements winnerInfo_t, all entries presumed initialized * this function cannot error. */ static void BMK_print_cLevelTable(FILE* f, const winnerInfo_t* winners, const size_t srcSize) { int cLevel; fprintf(f, "\n /* Proposed configurations : */ \n"); fprintf(f, " /* W, C, H, S, L, T, strat */ \n"); for (cLevel=0; cLevel <= NB_LEVELS_TRACKED; cLevel++) BMK_print_cLevelEntry(f, cLevel, winners[cLevel].params, winners[cLevel].result, srcSize); } /* BMK_saveAndPrint_cLevelTable() : * save candidate compression table into FILE* f, * and then to stdout. * f must exist, be already opened, and be seekable. * winners must be a table of NB_LEVELS_TRACKED+1 elements winnerInfo_t, all entries presumed initialized * this function cannot error. */ static void BMK_saveAndPrint_cLevelTable(FILE* const f, const winnerInfo_t* winners, const size_t srcSize) { fseek(f, 0, SEEK_SET); BMK_print_cLevelTable(f, winners, srcSize); fflush(f); BMK_print_cLevelTable(stdout, winners, srcSize); } /*-******************************************************* * Functions to Benchmark *********************************************************/ typedef struct { ZSTD_CCtx* cctx; const void* dictBuffer; size_t dictBufferSize; int cLevel; const paramValues_t* comprParams; } BMK_initCCtxArgs; static size_t local_initCCtx(void* payload) { const BMK_initCCtxArgs* ag = (const BMK_initCCtxArgs*)payload; varInds_t i; ZSTD_CCtx_reset(ag->cctx, ZSTD_reset_session_and_parameters); ZSTD_CCtx_setParameter(ag->cctx, ZSTD_c_compressionLevel, ag->cLevel); for(i = 0; i < NUM_PARAMS; i++) { if(ag->comprParams->vals[i] != PARAM_UNSET) ZSTD_CCtx_setParameter(ag->cctx, cctxSetParamTable[i], ag->comprParams->vals[i]); } ZSTD_CCtx_loadDictionary(ag->cctx, ag->dictBuffer, ag->dictBufferSize); return 0; } typedef struct { ZSTD_DCtx* dctx; const void* dictBuffer; size_t dictBufferSize; } BMK_initDCtxArgs; static size_t local_initDCtx(void* payload) { const BMK_initDCtxArgs* ag = (const BMK_initDCtxArgs*)payload; ZSTD_DCtx_reset(ag->dctx, ZSTD_reset_session_and_parameters); ZSTD_DCtx_loadDictionary(ag->dctx, ag->dictBuffer, ag->dictBufferSize); return 0; } /* additional argument is just the context */ static size_t local_defaultCompress( const void* srcBuffer, size_t srcSize, void* dstBuffer, size_t dstSize, void* addArgs) { ZSTD_CCtx* cctx = (ZSTD_CCtx*)addArgs; assert(dstSize == ZSTD_compressBound(srcSize)); /* specific to this version, which is only used in paramgrill */ return ZSTD_compress2(cctx, dstBuffer, dstSize, srcBuffer, srcSize); } /* additional argument is just the context */ static size_t local_defaultDecompress( const void* srcBuffer, size_t srcSize, void* dstBuffer, size_t dstSize, void* addArgs) { size_t moreToFlush = 1; ZSTD_DCtx* dctx = (ZSTD_DCtx*)addArgs; ZSTD_inBuffer in; ZSTD_outBuffer out; in.src = srcBuffer; in.size = srcSize; in.pos = 0; out.dst = dstBuffer; out.size = dstSize; out.pos = 0; while (moreToFlush) { if(out.pos == out.size) { return (size_t)-ZSTD_error_dstSize_tooSmall; } moreToFlush = ZSTD_decompressStream(dctx, &out, &in); if (ZSTD_isError(moreToFlush)) { return moreToFlush; } } return out.pos; } /*-************************************ * Data Initialization Functions **************************************/ typedef struct { void* srcBuffer; size_t srcSize; const void** srcPtrs; size_t* srcSizes; void** dstPtrs; size_t* dstCapacities; size_t* dstSizes; void** resPtrs; size_t* resSizes; size_t nbBlocks; size_t maxBlockSize; } buffers_t; typedef struct { size_t dictSize; void* dictBuffer; ZSTD_CCtx* cctx; ZSTD_DCtx* dctx; } contexts_t; static void freeNonSrcBuffers(const buffers_t b) { free(b.srcPtrs); free(b.srcSizes); if(b.dstPtrs != NULL) { free(b.dstPtrs[0]); } free(b.dstPtrs); free(b.dstCapacities); free(b.dstSizes); if(b.resPtrs != NULL) { free(b.resPtrs[0]); } free(b.resPtrs); free(b.resSizes); } static void freeBuffers(const buffers_t b) { if(b.srcPtrs != NULL) { free(b.srcBuffer); } freeNonSrcBuffers(b); } /* srcBuffer will be freed by freeBuffers now */ static int createBuffersFromMemory(buffers_t* buff, void * srcBuffer, const size_t nbFiles, const size_t* fileSizes) { size_t pos = 0, n, blockSize; U32 maxNbBlocks, blockNb = 0; buff->srcSize = 0; for(n = 0; n < nbFiles; n++) { buff->srcSize += fileSizes[n]; } if(buff->srcSize == 0) { DISPLAY("No data to bench\n"); return 1; } blockSize = g_blockSize ? g_blockSize : buff->srcSize; maxNbBlocks = (U32) ((buff->srcSize + (blockSize-1)) / blockSize) + (U32)nbFiles; buff->srcPtrs = (const void**)calloc(maxNbBlocks, sizeof(void*)); buff->srcSizes = (size_t*)malloc(maxNbBlocks * sizeof(size_t)); buff->dstPtrs = (void**)calloc(maxNbBlocks, sizeof(void*)); buff->dstCapacities = (size_t*)malloc(maxNbBlocks * sizeof(size_t)); buff->dstSizes = (size_t*)malloc(maxNbBlocks * sizeof(size_t)); buff->resPtrs = (void**)calloc(maxNbBlocks, sizeof(void*)); buff->resSizes = (size_t*)malloc(maxNbBlocks * sizeof(size_t)); if(!buff->srcPtrs || !buff->srcSizes || !buff->dstPtrs || !buff->dstCapacities || !buff->dstSizes || !buff->resPtrs || !buff->resSizes) { DISPLAY("alloc error\n"); freeNonSrcBuffers(*buff); return 1; } buff->srcBuffer = srcBuffer; buff->srcPtrs[0] = (const void*)buff->srcBuffer; buff->dstPtrs[0] = malloc(ZSTD_compressBound(buff->srcSize) + (maxNbBlocks * 1024)); buff->resPtrs[0] = malloc(buff->srcSize); if(!buff->dstPtrs[0] || !buff->resPtrs[0]) { DISPLAY("alloc error\n"); freeNonSrcBuffers(*buff); return 1; } for(n = 0; n < nbFiles; n++) { size_t pos_end = pos + fileSizes[n]; for(; pos < pos_end; blockNb++) { buff->srcPtrs[blockNb] = (const void*)((char*)srcBuffer + pos); buff->srcSizes[blockNb] = blockSize; pos += blockSize; } if(fileSizes[n] > 0) { buff->srcSizes[blockNb - 1] = ((fileSizes[n] - 1) % blockSize) + 1; } pos = pos_end; } buff->dstCapacities[0] = ZSTD_compressBound(buff->srcSizes[0]); buff->dstSizes[0] = buff->dstCapacities[0]; buff->resSizes[0] = buff->srcSizes[0]; buff->maxBlockSize = buff->srcSizes[0]; for(n = 1; n < blockNb; n++) { buff->dstPtrs[n] = ((char*)buff->dstPtrs[n-1]) + buff->dstCapacities[n-1]; buff->resPtrs[n] = ((char*)buff->resPtrs[n-1]) + buff->resSizes[n-1]; buff->dstCapacities[n] = ZSTD_compressBound(buff->srcSizes[n]); buff->dstSizes[n] = buff->dstCapacities[n]; buff->resSizes[n] = buff->srcSizes[n]; buff->maxBlockSize = MAX(buff->maxBlockSize, buff->srcSizes[n]); } buff->nbBlocks = blockNb; return 0; } /* allocates buffer's arguments. returns success / failure */ static int createBuffers(buffers_t* buff, const char* const * const fileNamesTable, size_t nbFiles) { size_t pos = 0; size_t n; size_t totalSizeToLoad = UTIL_getTotalFileSize(fileNamesTable, (U32)nbFiles); size_t benchedSize = MIN(BMK_findMaxMem(totalSizeToLoad * 3) / 3, totalSizeToLoad); size_t* fileSizes = calloc(sizeof(size_t), nbFiles); void* srcBuffer = NULL; int ret = 0; if(!totalSizeToLoad || !benchedSize) { ret = 1; DISPLAY("Nothing to Bench\n"); goto _cleanUp; } srcBuffer = malloc(benchedSize); if(!fileSizes || !srcBuffer) { ret = 1; goto _cleanUp; } for(n = 0; n < nbFiles; n++) { FILE* f; U64 fileSize = UTIL_getFileSize(fileNamesTable[n]); if (UTIL_isDirectory(fileNamesTable[n])) { DISPLAY("Ignoring %s directory... \n", fileNamesTable[n]); continue; } if (fileSize == UTIL_FILESIZE_UNKNOWN) { DISPLAY("Cannot evaluate size of %s, ignoring ... \n", fileNamesTable[n]); continue; } f = fopen(fileNamesTable[n], "rb"); if (f==NULL) { DISPLAY("impossible to open file %s\n", fileNamesTable[n]); fclose(f); ret = 10; goto _cleanUp; } DISPLAYLEVEL(2, "Loading %s... \r", fileNamesTable[n]); if (fileSize + pos > benchedSize) fileSize = benchedSize - pos, nbFiles=n; /* buffer too small - stop after this file */ { char* buffer = (char*)(srcBuffer); size_t const readSize = fread((buffer)+pos, 1, (size_t)fileSize, f); fclose(f); if (readSize != (size_t)fileSize) { DISPLAY("could not read %s", fileNamesTable[n]); ret = 1; goto _cleanUp; } fileSizes[n] = readSize; pos += readSize; } } ret = createBuffersFromMemory(buff, srcBuffer, nbFiles, fileSizes); _cleanUp: if(ret) { free(srcBuffer); } free(fileSizes); return ret; } static void freeContexts(const contexts_t ctx) { free(ctx.dictBuffer); ZSTD_freeCCtx(ctx.cctx); ZSTD_freeDCtx(ctx.dctx); } static int createContexts(contexts_t* ctx, const char* dictFileName) { FILE* f; size_t readSize; ctx->cctx = ZSTD_createCCtx(); ctx->dctx = ZSTD_createDCtx(); assert(ctx->cctx != NULL); assert(ctx->dctx != NULL); if(dictFileName == NULL) { ctx->dictSize = 0; ctx->dictBuffer = NULL; return 0; } { U64 const dictFileSize = UTIL_getFileSize(dictFileName); assert(dictFileSize != UTIL_FILESIZE_UNKNOWN); ctx->dictSize = dictFileSize; assert((U64)ctx->dictSize == dictFileSize); /* check overflow */ } ctx->dictBuffer = malloc(ctx->dictSize); f = fopen(dictFileName, "rb"); if (f==NULL) { DISPLAY("unable to open file\n"); freeContexts(*ctx); return 1; } if (ctx->dictSize > 64 MB || !(ctx->dictBuffer)) { DISPLAY("dictionary too large\n"); fclose(f); freeContexts(*ctx); return 1; } readSize = fread(ctx->dictBuffer, 1, ctx->dictSize, f); fclose(f); if (readSize != ctx->dictSize) { DISPLAY("unable to read file\n"); freeContexts(*ctx); return 1; } return 0; } /*-************************************ * Optimizer Memoization Functions **************************************/ /* return: new length */ /* keep old array, will need if iter over strategy. */ /* prunes useless params */ static size_t sanitizeVarArray(varInds_t* varNew, const size_t varLength, const varInds_t* varArray, const ZSTD_strategy strat) { size_t i, j = 0; for(i = 0; i < varLength; i++) { if( !((varArray[i] == clog_ind && strat == ZSTD_fast) || (varArray[i] == slog_ind && strat == ZSTD_fast) || (varArray[i] == slog_ind && strat == ZSTD_dfast) || (varArray[i] == tlen_ind && strat < ZSTD_btopt && strat != ZSTD_fast))) { varNew[j] = varArray[i]; j++; } } return j; } /* res should be NUM_PARAMS size */ /* constructs varArray from paramValues_t style parameter */ /* pass in using dict. */ static size_t variableParams(const paramValues_t paramConstraints, varInds_t* res, const int usingDictionary) { varInds_t i; size_t j = 0; for(i = 0; i < NUM_PARAMS; i++) { if(paramConstraints.vals[i] == PARAM_UNSET) { if(i == fadt_ind && !usingDictionary) continue; /* don't use fadt if no dictionary */ res[j] = i; j++; } } return j; } /* length of memo table given free variables */ static size_t memoTableLen(const varInds_t* varyParams, const size_t varyLen) { size_t arrayLen = 1; size_t i; for(i = 0; i < varyLen; i++) { if(varyParams[i] == strt_ind) continue; /* strategy separated by table */ arrayLen *= rangetable[varyParams[i]]; } return arrayLen; } /* returns unique index in memotable of compression parameters */ static unsigned memoTableIndDirect(const paramValues_t* ptr, const varInds_t* varyParams, const size_t varyLen) { size_t i; unsigned ind = 0; for(i = 0; i < varyLen; i++) { varInds_t v = varyParams[i]; if(v == strt_ind) continue; /* exclude strategy from memotable */ ind *= rangetable[v]; ind += (unsigned)invRangeMap(v, ptr->vals[v]); } return ind; } static size_t memoTableGet(const memoTable_t* memoTableArray, const paramValues_t p) { const memoTable_t mt = memoTableArray[p.vals[strt_ind]]; switch(mt.tableType) { case directMap: return mt.table[memoTableIndDirect(&p, mt.varArray, mt.varLen)]; case xxhashMap: return mt.table[(XXH64(&p.vals, sizeof(U32) * NUM_PARAMS, 0) >> 3) % mt.tableLen]; case noMemo: return 0; } return 0; /* should never happen, stop compiler warnings */ } static void memoTableSet(const memoTable_t* memoTableArray, const paramValues_t p, const BYTE value) { const memoTable_t mt = memoTableArray[p.vals[strt_ind]]; switch(mt.tableType) { case directMap: mt.table[memoTableIndDirect(&p, mt.varArray, mt.varLen)] = value; break; case xxhashMap: mt.table[(XXH64(&p.vals, sizeof(U32) * NUM_PARAMS, 0) >> 3) % mt.tableLen] = value; break; case noMemo: break; } } /* frees all allocated memotables */ /* secret contract : * mtAll is a table of (ZSTD_STRATEGY_MAX+1) memoTable_t */ static void freeMemoTableArray(memoTable_t* const mtAll) { int i; if(mtAll == NULL) { return; } for(i = 1; i <= (int)ZSTD_STRATEGY_MAX; i++) { free(mtAll[i].table); } free(mtAll); } /* inits memotables for all (including mallocs), all strategies */ /* takes unsanitized varyParams */ static memoTable_t* createMemoTableArray(const paramValues_t p, const varInds_t* const varyParams, const size_t varyLen, const U32 memoTableLog) { memoTable_t* const mtAll = (memoTable_t*)calloc(sizeof(memoTable_t),(ZSTD_STRATEGY_MAX + 1)); ZSTD_strategy i, stratMin = ZSTD_STRATEGY_MIN, stratMax = ZSTD_STRATEGY_MAX; if(mtAll == NULL) { return NULL; } for(i = 1; i <= (int)ZSTD_STRATEGY_MAX; i++) { mtAll[i].varLen = sanitizeVarArray(mtAll[i].varArray, varyLen, varyParams, i); } /* no memoization */ if(memoTableLog == 0) { for(i = 1; i <= (int)ZSTD_STRATEGY_MAX; i++) { mtAll[i].tableType = noMemo; mtAll[i].table = NULL; mtAll[i].tableLen = 0; } return mtAll; } if(p.vals[strt_ind] != PARAM_UNSET) { stratMin = p.vals[strt_ind]; stratMax = p.vals[strt_ind]; } for(i = stratMin; i <= stratMax; i++) { size_t mtl = memoTableLen(mtAll[i].varArray, mtAll[i].varLen); mtAll[i].tableType = directMap; if(memoTableLog != PARAM_UNSET && mtl > (1ULL << memoTableLog)) { /* use hash table */ /* provide some option to only use hash tables? */ mtAll[i].tableType = xxhashMap; mtl = (1ULL << memoTableLog); } mtAll[i].table = (BYTE*)calloc(sizeof(BYTE), mtl); mtAll[i].tableLen = mtl; if(mtAll[i].table == NULL) { freeMemoTableArray(mtAll); return NULL; } } return mtAll; } /* Sets pc to random unmeasured set of parameters */ /* specify strategy */ static void randomConstrainedParams(paramValues_t* pc, const memoTable_t* memoTableArray, const ZSTD_strategy st) { size_t j; const memoTable_t mt = memoTableArray[st]; pc->vals[strt_ind] = st; for(j = 0; j < mt.tableLen; j++) { int i; for(i = 0; i < NUM_PARAMS; i++) { varInds_t v = mt.varArray[i]; if(v == strt_ind) continue; pc->vals[v] = rangeMap(v, FUZ_rand(&g_rand) % rangetable[v]); } if(!(memoTableGet(memoTableArray, *pc))) break; /* only pick unpicked params. */ } } /*-************************************ * Benchmarking Functions **************************************/ static void display_params_tested(paramValues_t cParams) { varInds_t vi; DISPLAYLEVEL(3, "\r testing :"); for (vi=0; vi < NUM_PARAMS; vi++) { DISPLAYLEVEL(3, "%3u,", (unsigned)cParams.vals[vi]); } DISPLAYLEVEL(3, "\b \r"); } /* Replicate functionality of benchMemAdvanced, but with pre-split src / dst buffers */ /* The purpose is so that sufficient information is returned so that a decompression call to benchMemInvertible is possible */ /* BMK_benchMemAdvanced(srcBuffer,srcSize, dstBuffer, dstSize, fileSizes, nbFiles, 0, &cParams, dictBuffer, dictSize, ctx, dctx, 0, "File", &adv); */ /* nbSeconds used in same way as in BMK_advancedParams_t */ /* if in decodeOnly, then srcPtr's will be compressed blocks, and uncompressedBlocks will be written to dstPtrs */ /* dictionary nullable, nothing else though. */ /* note : it would be a lot better if this function was present in benchzstd.c, * sharing code with benchMemAdvanced(), since it's technically a part of it */ static BMK_benchOutcome_t BMK_benchMemInvertible( buffers_t buf, contexts_t ctx, int cLevel, const paramValues_t* comprParams, BMK_mode_t mode, unsigned nbSeconds) { U32 i; BMK_benchResult_t bResult; const void *const *const srcPtrs = (const void *const *const)buf.srcPtrs; size_t const *const srcSizes = buf.srcSizes; void** const dstPtrs = buf.dstPtrs; size_t const *const dstCapacities = buf.dstCapacities; size_t* const dstSizes = buf.dstSizes; void** const resPtrs = buf.resPtrs; size_t const *const resSizes = buf.resSizes; const void* dictBuffer = ctx.dictBuffer; const size_t dictBufferSize = ctx.dictSize; const size_t nbBlocks = buf.nbBlocks; const size_t srcSize = buf.srcSize; ZSTD_CCtx* cctx = ctx.cctx; ZSTD_DCtx* dctx = ctx.dctx; /* init */ display_params_tested(*comprParams); memset(&bResult, 0, sizeof(bResult)); /* warming up memory */ for (i = 0; i < buf.nbBlocks; i++) { if (mode != BMK_decodeOnly) { RDG_genBuffer(dstPtrs[i], dstCapacities[i], 0.10, 0.50, 1); } else { RDG_genBuffer(resPtrs[i], resSizes[i], 0.10, 0.50, 1); } } /* Bench */ { /* init args */ int compressionCompleted = (mode == BMK_decodeOnly); int decompressionCompleted = (mode == BMK_compressOnly); BMK_timedFnState_t* timeStateCompress = BMK_createTimedFnState(nbSeconds * 1000, 1000); BMK_timedFnState_t* timeStateDecompress = BMK_createTimedFnState(nbSeconds * 1000, 1000); BMK_benchParams_t cbp, dbp; BMK_initCCtxArgs cctxprep; BMK_initDCtxArgs dctxprep; cbp.benchFn = local_defaultCompress; cbp.benchPayload = cctx; cbp.initFn = local_initCCtx; cbp.initPayload = &cctxprep; cbp.errorFn = ZSTD_isError; cbp.blockCount = nbBlocks; cbp.srcBuffers = srcPtrs; cbp.srcSizes = srcSizes; cbp.dstBuffers = dstPtrs; cbp.dstCapacities = dstCapacities; cbp.blockResults = dstSizes; cctxprep.cctx = cctx; cctxprep.dictBuffer = dictBuffer; cctxprep.dictBufferSize = dictBufferSize; cctxprep.cLevel = cLevel; cctxprep.comprParams = comprParams; dbp.benchFn = local_defaultDecompress; dbp.benchPayload = dctx; dbp.initFn = local_initDCtx; dbp.initPayload = &dctxprep; dbp.errorFn = ZSTD_isError; dbp.blockCount = nbBlocks; dbp.srcBuffers = (const void* const *) dstPtrs; dbp.srcSizes = dstCapacities; dbp.dstBuffers = resPtrs; dbp.dstCapacities = resSizes; dbp.blockResults = NULL; dctxprep.dctx = dctx; dctxprep.dictBuffer = dictBuffer; dctxprep.dictBufferSize = dictBufferSize; assert(timeStateCompress != NULL); assert(timeStateDecompress != NULL); while(!compressionCompleted) { BMK_runOutcome_t const cOutcome = BMK_benchTimedFn(timeStateCompress, cbp); if (!BMK_isSuccessful_runOutcome(cOutcome)) { BMK_benchOutcome_t bOut; memset(&bOut, 0, sizeof(bOut)); bOut.tag = 1; /* should rather be a function or a constant */ BMK_freeTimedFnState(timeStateCompress); BMK_freeTimedFnState(timeStateDecompress); return bOut; } { BMK_runTime_t const rResult = BMK_extract_runTime(cOutcome); bResult.cSpeed = (unsigned long long)((double)srcSize * TIMELOOP_NANOSEC / rResult.nanoSecPerRun); bResult.cSize = rResult.sumOfReturn; } compressionCompleted = BMK_isCompleted_TimedFn(timeStateCompress); } while (!decompressionCompleted) { BMK_runOutcome_t const dOutcome = BMK_benchTimedFn(timeStateDecompress, dbp); if (!BMK_isSuccessful_runOutcome(dOutcome)) { BMK_benchOutcome_t bOut; memset(&bOut, 0, sizeof(bOut)); bOut.tag = 1; /* should rather be a function or a constant */ BMK_freeTimedFnState(timeStateCompress); BMK_freeTimedFnState(timeStateDecompress); return bOut; } { BMK_runTime_t const rResult = BMK_extract_runTime(dOutcome); bResult.dSpeed = (unsigned long long)((double)srcSize * TIMELOOP_NANOSEC / rResult.nanoSecPerRun); } decompressionCompleted = BMK_isCompleted_TimedFn(timeStateDecompress); } BMK_freeTimedFnState(timeStateCompress); BMK_freeTimedFnState(timeStateDecompress); } /* Bench */ bResult.cMem = (1 << (comprParams->vals[wlog_ind])) + ZSTD_sizeof_CCtx(cctx); { BMK_benchOutcome_t bOut; bOut.tag = 0; bOut.internal_never_use_directly = bResult; /* should be a function */ return bOut; } } /* BMK_benchParam() : * benchmark a set of `cParams` over sample `buf`, * store the result in `resultPtr`. * @return : 0 if success, 1 if error */ static int BMK_benchParam ( BMK_benchResult_t* resultPtr, buffers_t buf, contexts_t ctx, paramValues_t cParams) { BMK_benchOutcome_t const outcome = BMK_benchMemInvertible(buf, ctx, BASE_CLEVEL, &cParams, BMK_both, 3); if (!BMK_isSuccessful_benchOutcome(outcome)) return 1; *resultPtr = BMK_extract_benchResult(outcome); return 0; } /* Benchmarking which stops when we are sufficiently sure the solution is infeasible / worse than the winner */ #define VARIANCE 1.2 static int allBench(BMK_benchResult_t* resultPtr, const buffers_t buf, const contexts_t ctx, const paramValues_t cParams, const constraint_t target, BMK_benchResult_t* winnerResult, int feas) { BMK_benchResult_t benchres; double uncertaintyConstantC = 3., uncertaintyConstantD = 3.; double winnerRS; BMK_benchOutcome_t const outcome = BMK_benchMemInvertible(buf, ctx, BASE_CLEVEL, &cParams, BMK_both, 2); if (!BMK_isSuccessful_benchOutcome(outcome)) { DEBUGOUTPUT("Benchmarking failed \n"); return ERROR_RESULT; } benchres = BMK_extract_benchResult(outcome); winnerRS = resultScore(*winnerResult, buf.srcSize, target); DEBUGOUTPUT("WinnerScore: %f \n ", winnerRS); *resultPtr = benchres; /* anything with worse ratio in feas is definitely worse, discard */ if(feas && benchres.cSize < winnerResult->cSize && !g_optmode) { return WORSE_RESULT; } /* calculate uncertainty in compression / decompression runs */ if (benchres.cSpeed) { U64 const loopDurationC = (((U64)buf.srcSize * TIMELOOP_NANOSEC) / benchres.cSpeed); uncertaintyConstantC = ((loopDurationC + (double)(2 * g_clockGranularity))/loopDurationC); } if (benchres.dSpeed) { U64 const loopDurationD = (((U64)buf.srcSize * TIMELOOP_NANOSEC) / benchres.dSpeed); uncertaintyConstantD = ((loopDurationD + (double)(2 * g_clockGranularity))/loopDurationD); } /* optimistic assumption of benchres */ { BMK_benchResult_t resultMax = benchres; resultMax.cSpeed *= uncertaintyConstantC * VARIANCE; resultMax.dSpeed *= uncertaintyConstantD * VARIANCE; /* disregard infeasible results in feas mode */ /* disregard if resultMax < winner in infeas mode */ if((feas && !feasible(resultMax, target)) || (!feas && (winnerRS > resultScore(resultMax, buf.srcSize, target)))) { return WORSE_RESULT; } } /* compare by resultScore when in infeas */ /* compare by compareResultLT when in feas */ if((!feas && (resultScore(benchres, buf.srcSize, target) > resultScore(*winnerResult, buf.srcSize, target))) || (feas && (compareResultLT(*winnerResult, benchres, target, buf.srcSize))) ) { return BETTER_RESULT; } else { return WORSE_RESULT; } } #define INFEASIBLE_THRESHOLD 200 /* Memoized benchmarking, won't benchmark anything which has already been benchmarked before. */ static int benchMemo(BMK_benchResult_t* resultPtr, const buffers_t buf, const contexts_t ctx, const paramValues_t cParams, const constraint_t target, BMK_benchResult_t* winnerResult, memoTable_t* const memoTableArray, const int feas) { static int bmcount = 0; int res; if ( memoTableGet(memoTableArray, cParams) >= INFEASIBLE_THRESHOLD || redundantParams(cParams, target, buf.maxBlockSize) ) { return WORSE_RESULT; } res = allBench(resultPtr, buf, ctx, cParams, target, winnerResult, feas); if(DEBUG && !(bmcount % 250)) { DISPLAY("Count: %d\n", bmcount); bmcount++; } BMK_printWinnerOpt(stdout, CUSTOM_LEVEL, *resultPtr, cParams, target, buf.srcSize); if(res == BETTER_RESULT || feas) { memoTableSet(memoTableArray, cParams, 255); /* what happens if collisions are frequent */ } return res; } typedef struct { U64 cSpeed_min; U64 dSpeed_min; U32 windowLog_max; ZSTD_strategy strategy_max; } level_constraints_t; static level_constraints_t g_level_constraint[NB_LEVELS_TRACKED+1]; static void BMK_init_level_constraints(int bytePerSec_level1) { assert(NB_LEVELS_TRACKED >= ZSTD_maxCLevel()); memset(g_level_constraint, 0, sizeof(g_level_constraint)); g_level_constraint[1].cSpeed_min = bytePerSec_level1; g_level_constraint[1].dSpeed_min = 0.; g_level_constraint[1].windowLog_max = 19; g_level_constraint[1].strategy_max = ZSTD_fast; /* establish speed objectives (relative to level 1) */ { int l; for (l=2; l<=NB_LEVELS_TRACKED; l++) { g_level_constraint[l].cSpeed_min = (g_level_constraint[l-1].cSpeed_min * 49) / 64; g_level_constraint[l].dSpeed_min = 0.; g_level_constraint[l].windowLog_max = (l<20) ? 23 : l+5; /* only --ultra levels >= 20 can use windowlog > 23 */ g_level_constraint[l].strategy_max = ZSTD_STRATEGY_MAX; } } } static int BMK_seed(winnerInfo_t* winners, const paramValues_t params, const buffers_t buf, const contexts_t ctx) { BMK_benchResult_t testResult; int better = 0; int cLevel; BMK_benchParam(&testResult, buf, ctx, params); for (cLevel = 1; cLevel <= NB_LEVELS_TRACKED; cLevel++) { if (testResult.cSpeed < g_level_constraint[cLevel].cSpeed_min) continue; /* not fast enough for this level */ if (testResult.dSpeed < g_level_constraint[cLevel].dSpeed_min) continue; /* not fast enough for this level */ if (params.vals[wlog_ind] > g_level_constraint[cLevel].windowLog_max) continue; /* too much memory for this level */ if (params.vals[strt_ind] > g_level_constraint[cLevel].strategy_max) continue; /* forbidden strategy for this level */ if (winners[cLevel].result.cSize==0) { /* first solution for this cLevel */ winners[cLevel].result = testResult; winners[cLevel].params = params; BMK_print_cLevelEntry(stdout, cLevel, params, testResult, buf.srcSize); better = 1; continue; } if ((double)testResult.cSize <= ((double)winners[cLevel].result.cSize * (1. + (0.02 / cLevel))) ) { /* Validate solution is "good enough" */ double W_ratio = (double)buf.srcSize / testResult.cSize; double O_ratio = (double)buf.srcSize / winners[cLevel].result.cSize; double W_ratioNote = log (W_ratio); double O_ratioNote = log (O_ratio); size_t W_DMemUsed = (1 << params.vals[wlog_ind]) + (16 KB); size_t O_DMemUsed = (1 << winners[cLevel].params.vals[wlog_ind]) + (16 KB); double W_DMemUsed_note = W_ratioNote * ( 40 + 9*cLevel) - log((double)W_DMemUsed); double O_DMemUsed_note = O_ratioNote * ( 40 + 9*cLevel) - log((double)O_DMemUsed); size_t W_CMemUsed = (1 << params.vals[wlog_ind]) + ZSTD_estimateCCtxSize_usingCParams(pvalsToCParams(params)); size_t O_CMemUsed = (1 << winners[cLevel].params.vals[wlog_ind]) + ZSTD_estimateCCtxSize_usingCParams(pvalsToCParams(winners[cLevel].params)); double W_CMemUsed_note = W_ratioNote * ( 50 + 13*cLevel) - log((double)W_CMemUsed); double O_CMemUsed_note = O_ratioNote * ( 50 + 13*cLevel) - log((double)O_CMemUsed); double W_CSpeed_note = W_ratioNote * ( 30 + 10*cLevel) + log(testResult.cSpeed); double O_CSpeed_note = O_ratioNote * ( 30 + 10*cLevel) + log(winners[cLevel].result.cSpeed); double W_DSpeed_note = W_ratioNote * ( 20 + 2*cLevel) + log(testResult.dSpeed); double O_DSpeed_note = O_ratioNote * ( 20 + 2*cLevel) + log(winners[cLevel].result.dSpeed); if (W_DMemUsed_note < O_DMemUsed_note) { /* uses too much Decompression memory for too little benefit */ if (W_ratio > O_ratio) DISPLAYLEVEL(3, "Decompression Memory : %5.3f @ %4.1f MB vs %5.3f @ %4.1f MB : not enough for level %i\n", W_ratio, (double)(W_DMemUsed) / 1024 / 1024, O_ratio, (double)(O_DMemUsed) / 1024 / 1024, cLevel); continue; } if (W_CMemUsed_note < O_CMemUsed_note) { /* uses too much memory for compression for too little benefit */ if (W_ratio > O_ratio) DISPLAYLEVEL(3, "Compression Memory : %5.3f @ %4.1f MB vs %5.3f @ %4.1f MB : not enough for level %i\n", W_ratio, (double)(W_CMemUsed) / 1024 / 1024, O_ratio, (double)(O_CMemUsed) / 1024 / 1024, cLevel); continue; } if (W_CSpeed_note < O_CSpeed_note ) { /* too large compression speed difference for the compression benefit */ if (W_ratio > O_ratio) DISPLAYLEVEL(3, "Compression Speed : %5.3f @ %4.1f MB/s vs %5.3f @ %4.1f MB/s : not enough for level %i\n", W_ratio, (double)testResult.cSpeed / MB_UNIT, O_ratio, (double)winners[cLevel].result.cSpeed / MB_UNIT, cLevel); continue; } if (W_DSpeed_note < O_DSpeed_note ) { /* too large decompression speed difference for the compression benefit */ if (W_ratio > O_ratio) DISPLAYLEVEL(3, "Decompression Speed : %5.3f @ %4.1f MB/s vs %5.3f @ %4.1f MB/s : not enough for level %i\n", W_ratio, (double)testResult.dSpeed / MB_UNIT, O_ratio, (double)winners[cLevel].result.dSpeed / MB_UNIT, cLevel); continue; } if (W_ratio < O_ratio) DISPLAYLEVEL(3, "Solution %4.3f selected over %4.3f at level %i, due to better secondary statistics \n", W_ratio, O_ratio, cLevel); winners[cLevel].result = testResult; winners[cLevel].params = params; BMK_print_cLevelEntry(stdout, cLevel, params, testResult, buf.srcSize); better = 1; } } return better; } /*-************************************ * Compression Level Table Generation Functions **************************************/ #define PARAMTABLELOG 25 #define PARAMTABLESIZE (1<<PARAMTABLELOG) #define PARAMTABLEMASK (PARAMTABLESIZE-1) static BYTE g_alreadyTested[PARAMTABLESIZE] = {0}; /* init to zero */ static BYTE* NB_TESTS_PLAYED(paramValues_t p) { ZSTD_compressionParameters const cParams = pvalsToCParams(sanitizeParams(p)); unsigned long long const h64 = XXH64(&cParams, sizeof(cParams), 0); return &g_alreadyTested[(h64 >> 3) & PARAMTABLEMASK]; } static void playAround(FILE* f, winnerInfo_t* winners, paramValues_t p, const buffers_t buf, const contexts_t ctx) { int nbVariations = 0; UTIL_time_t const clockStart = UTIL_getTime(); while (UTIL_clockSpanMicro(clockStart) < g_maxVariationTime) { if (nbVariations++ > g_maxNbVariations) break; do { int i; for(i = 0; i < 4; i++) { paramVaryOnce(FUZ_rand(&g_rand) % (strt_ind + 1), ((FUZ_rand(&g_rand) & 1) << 1) - 1, &p); } } while (!paramValid(p)); /* exclude faster if already played params */ if (FUZ_rand(&g_rand) & ((1 << *NB_TESTS_PLAYED(p))-1)) continue; /* test */ { BYTE* const b = NB_TESTS_PLAYED(p); (*b)++; } if (!BMK_seed(winners, p, buf, ctx)) continue; /* improvement found => search more */ BMK_saveAndPrint_cLevelTable(f, winners, buf.srcSize); playAround(f, winners, p, buf, ctx); } } static void BMK_selectRandomStart( FILE* f, winnerInfo_t* winners, const buffers_t buf, const contexts_t ctx) { U32 const id = FUZ_rand(&g_rand) % (NB_LEVELS_TRACKED+1); if ((id==0) || (winners[id].params.vals[wlog_ind]==0)) { /* use some random entry */ paramValues_t const p = adjustParams(cParamsToPVals(pvalsToCParams(randomParams())), /* defaults nonCompression parameters */ buf.srcSize, 0); playAround(f, winners, p, buf, ctx); } else { playAround(f, winners, winners[id].params, buf, ctx); } } /* BMK_generate_cLevelTable() : * test a large number of configurations * and distribute them across compression levels according to speed conditions. * display and save all intermediate results into rfName = "grillResults.txt". * the function automatically stops after g_timeLimit_s. * this function cannot error, it directly exit() in case of problem. */ static void BMK_generate_cLevelTable(const buffers_t buf, const contexts_t ctx) { paramValues_t params; winnerInfo_t winners[NB_LEVELS_TRACKED+1]; const char* const rfName = "grillResults.txt"; FILE* const f = fopen(rfName, "w"); /* init */ assert(g_singleRun==0); memset(winners, 0, sizeof(winners)); if (f==NULL) { DISPLAY("error opening %s \n", rfName); exit(1); } if (g_target) { BMK_init_level_constraints(g_target * MB_UNIT); } else { /* baseline config for level 1 */ paramValues_t const l1params = cParamsToPVals(ZSTD_getCParams(1, buf.maxBlockSize, ctx.dictSize)); BMK_benchResult_t testResult; BMK_benchParam(&testResult, buf, ctx, l1params); BMK_init_level_constraints((int)((testResult.cSpeed * 31) / 32)); } /* populate initial solution */ { const int maxSeeds = g_noSeed ? 1 : ZSTD_maxCLevel(); int i; for (i=0; i<=maxSeeds; i++) { params = cParamsToPVals(ZSTD_getCParams(i, buf.maxBlockSize, 0)); BMK_seed(winners, params, buf, ctx); } } BMK_saveAndPrint_cLevelTable(f, winners, buf.srcSize); /* start tests */ { const UTIL_time_t grillStart = UTIL_getTime(); do { BMK_selectRandomStart(f, winners, buf, ctx); } while (BMK_timeSpan_s(grillStart) < g_timeLimit_s); } /* end summary */ BMK_saveAndPrint_cLevelTable(f, winners, buf.srcSize); DISPLAY("grillParams operations completed \n"); /* clean up*/ fclose(f); } /*-************************************ * Single Benchmark Functions **************************************/ static int benchOnce(const buffers_t buf, const contexts_t ctx, const int cLevel) { BMK_benchResult_t testResult; g_params = adjustParams(overwriteParams(cParamsToPVals(ZSTD_getCParams(cLevel, buf.maxBlockSize, ctx.dictSize)), g_params), buf.maxBlockSize, ctx.dictSize); if (BMK_benchParam(&testResult, buf, ctx, g_params)) { DISPLAY("Error during benchmarking\n"); return 1; } BMK_printWinner(stdout, CUSTOM_LEVEL, testResult, g_params, buf.srcSize); return 0; } static int benchSample(double compressibility, int cLevel) { const char* const name = "Sample 10MB"; size_t const benchedSize = 10 MB; void* const srcBuffer = malloc(benchedSize); int ret = 0; buffers_t buf; contexts_t ctx; if(srcBuffer == NULL) { DISPLAY("Out of Memory\n"); return 2; } RDG_genBuffer(srcBuffer, benchedSize, compressibility, 0.0, 0); if(createBuffersFromMemory(&buf, srcBuffer, 1, &benchedSize)) { DISPLAY("Buffer Creation Error\n"); free(srcBuffer); return 3; } if(createContexts(&ctx, NULL)) { DISPLAY("Context Creation Error\n"); freeBuffers(buf); return 1; } /* bench */ DISPLAY("\r%79s\r", ""); DISPLAY("using %s %i%%: \n", name, (int)(compressibility*100)); if(g_singleRun) { ret = benchOnce(buf, ctx, cLevel); } else { BMK_generate_cLevelTable(buf, ctx); } freeBuffers(buf); freeContexts(ctx); return ret; } /* benchFiles() : * note: while this function takes a table of filenames, * in practice, only the first filename will be used */ static int benchFiles(const char** fileNamesTable, int nbFiles, const char* dictFileName, int cLevel) { buffers_t buf; contexts_t ctx; int ret = 0; if (createBuffers(&buf, fileNamesTable, nbFiles)) { DISPLAY("unable to load files\n"); return 1; } if (createContexts(&ctx, dictFileName)) { DISPLAY("unable to load dictionary\n"); freeBuffers(buf); return 2; } DISPLAY("\r%79s\r", ""); if (nbFiles == 1) { DISPLAY("using %s : \n", fileNamesTable[0]); } else { DISPLAY("using %d Files : \n", nbFiles); } if (g_singleRun) { ret = benchOnce(buf, ctx, cLevel); } else { BMK_generate_cLevelTable(buf, ctx); } freeBuffers(buf); freeContexts(ctx); return ret; } /*-************************************ * Local Optimization Functions **************************************/ /* One iteration of hill climbing. Specifically, it first tries all * valid parameter configurations w/ manhattan distance 1 and picks the best one * failing that, it progressively tries candidates further and further away (up to #dim + 2) * if it finds a candidate exceeding winnerInfo, it will repeat. Otherwise, it will stop the * current stage of hill climbing. * Each iteration of hill climbing proceeds in 2 'phases'. Phase 1 climbs according to * the resultScore function, which is effectively a linear increase in reward until it reaches * the constraint-satisfying value, it which point any excess results in only logarithmic reward. * This aims to find some constraint-satisfying point. * Phase 2 optimizes in accordance with what the original function sets out to maximize, with * all feasible solutions valued over all infeasible solutions. */ /* sanitize all params here. * all generation after random should be sanitized. (maybe sanitize random) */ static winnerInfo_t climbOnce(const constraint_t target, memoTable_t* mtAll, const buffers_t buf, const contexts_t ctx, const paramValues_t init) { /* * cparam - currently considered 'center' * candidate - params to benchmark/results * winner - best option found so far. */ paramValues_t cparam = init; winnerInfo_t candidateInfo, winnerInfo; int better = 1; int feas = 0; winnerInfo = initWinnerInfo(init); candidateInfo = winnerInfo; { winnerInfo_t bestFeasible1 = initWinnerInfo(cparam); DEBUGOUTPUT("Climb Part 1\n"); while(better) { int offset; size_t i, dist; const size_t varLen = mtAll[cparam.vals[strt_ind]].varLen; better = 0; DEBUGOUTPUT("Start\n"); cparam = winnerInfo.params; candidateInfo.params = cparam; /* all dist-1 candidates */ for (i = 0; i < varLen; i++) { for (offset = -1; offset <= 1; offset += 2) { CHECKTIME(winnerInfo); candidateInfo.params = cparam; paramVaryOnce(mtAll[cparam.vals[strt_ind]].varArray[i], offset, &candidateInfo.params); if(paramValid(candidateInfo.params)) { int res; res = benchMemo(&candidateInfo.result, buf, ctx, sanitizeParams(candidateInfo.params), target, &winnerInfo.result, mtAll, feas); DEBUGOUTPUT("Res: %d\n", res); if(res == BETTER_RESULT) { /* synonymous with better when called w/ infeasibleBM */ winnerInfo = candidateInfo; better = 1; if(compareResultLT(bestFeasible1.result, winnerInfo.result, target, buf.srcSize)) { bestFeasible1 = winnerInfo; } } } } /* for (offset = -1; offset <= 1; offset += 2) */ } /* for (i = 0; i < varLen; i++) */ if(better) { continue; } for (dist = 2; dist < varLen + 2; dist++) { /* varLen is # dimensions */ for (i = 0; i < (1 << varLen) / varLen + 2; i++) { int res; CHECKTIME(winnerInfo); candidateInfo.params = cparam; /* param error checking already done here */ paramVariation(&candidateInfo.params, mtAll, (U32)dist); res = benchMemo(&candidateInfo.result, buf, ctx, sanitizeParams(candidateInfo.params), target, &winnerInfo.result, mtAll, feas); DEBUGOUTPUT("Res: %d\n", res); if (res == BETTER_RESULT) { /* synonymous with better in this case*/ winnerInfo = candidateInfo; better = 1; if (compareResultLT(bestFeasible1.result, winnerInfo.result, target, buf.srcSize)) { bestFeasible1 = winnerInfo; } break; } } if (better) { break; } } /* for(dist = 2; dist < varLen + 2; dist++) */ if (!better) { /* infeas -> feas -> stop */ if (feas) return winnerInfo; feas = 1; better = 1; winnerInfo = bestFeasible1; /* note with change, bestFeasible may not necessarily be feasible, but if one has been benchmarked, it will be. */ DEBUGOUTPUT("Climb Part 2\n"); } } winnerInfo = bestFeasible1; } return winnerInfo; } /* Optimizes for a fixed strategy */ /* flexible parameters: iterations of failed climbing (or if we do non-random, maybe this is when everything is close to visited) weight more on visit for bad results, less on good results/more on later results / ones with more failures. allocate memoTable here. */ static winnerInfo_t optimizeFixedStrategy(const buffers_t buf, const contexts_t ctx, const constraint_t target, paramValues_t paramTarget, const ZSTD_strategy strat, memoTable_t* memoTableArray, const int tries) { int i = 0; paramValues_t init; winnerInfo_t winnerInfo, candidateInfo; winnerInfo = initWinnerInfo(emptyParams()); /* so climb is given the right fixed strategy */ paramTarget.vals[strt_ind] = strat; /* to pass ZSTD_checkCParams */ paramTarget = cParamUnsetMin(paramTarget); init = paramTarget; for(i = 0; i < tries; i++) { DEBUGOUTPUT("Restart\n"); do { randomConstrainedParams(&init, memoTableArray, strat); } while(redundantParams(init, target, buf.maxBlockSize)); candidateInfo = climbOnce(target, memoTableArray, buf, ctx, init); if (compareResultLT(winnerInfo.result, candidateInfo.result, target, buf.srcSize)) { winnerInfo = candidateInfo; BMK_printWinnerOpt(stdout, CUSTOM_LEVEL, winnerInfo.result, winnerInfo.params, target, buf.srcSize); i = 0; continue; } CHECKTIME(winnerInfo); i++; } return winnerInfo; } /* goes best, best-1, best+1, best-2, ... */ /* return 0 if nothing remaining */ static int nextStrategy(const int currentStrategy, const int bestStrategy) { if(bestStrategy <= currentStrategy) { int candidate = 2 * bestStrategy - currentStrategy - 1; if(candidate < 1) { candidate = currentStrategy + 1; if(candidate > (int)ZSTD_STRATEGY_MAX) { return 0; } else { return candidate; } } else { return candidate; } } else { /* bestStrategy >= currentStrategy */ int candidate = 2 * bestStrategy - currentStrategy; if(candidate > (int)ZSTD_STRATEGY_MAX) { candidate = currentStrategy - 1; if(candidate < 1) { return 0; } else { return candidate; } } else { return candidate; } } } /* experiment with playing with this and decay value */ /* main fn called when using --optimize */ /* Does strategy selection by benchmarking default compression levels * then optimizes by strategy, starting with the best one and moving * progressively moving further away by number * args: * fileNamesTable - list of files to benchmark * nbFiles - length of fileNamesTable * dictFileName - name of dictionary file if one, else NULL * target - performance constraints (cSpeed, dSpeed, cMem) * paramTarget - parameter constraints (i.e. restriction search space to where strategy = ZSTD_fast) * cLevel - compression level to exceed (all solutions must be > lvl in cSpeed + ratio) */ static unsigned g_maxTries = 5; #define TRY_DECAY 1 static int optimizeForSize(const char* const * const fileNamesTable, const size_t nbFiles, const char* dictFileName, constraint_t target, paramValues_t paramTarget, const int cLevelOpt, const int cLevelRun, const U32 memoTableLog) { varInds_t varArray [NUM_PARAMS]; int ret = 0; const size_t varLen = variableParams(paramTarget, varArray, dictFileName != NULL); winnerInfo_t winner = initWinnerInfo(emptyParams()); memoTable_t* allMT = NULL; paramValues_t paramBase; contexts_t ctx; buffers_t buf; g_time = UTIL_getTime(); if (createBuffers(&buf, fileNamesTable, nbFiles)) { DISPLAY("unable to load files\n"); return 1; } if (createContexts(&ctx, dictFileName)) { DISPLAY("unable to load dictionary\n"); freeBuffers(buf); return 2; } if (nbFiles == 1) { DISPLAYLEVEL(2, "Loading %s... \r", fileNamesTable[0]); } else { DISPLAYLEVEL(2, "Loading %lu Files... \r", (unsigned long)nbFiles); } /* sanitize paramTarget */ optimizerAdjustInput(¶mTarget, buf.maxBlockSize); paramBase = cParamUnsetMin(paramTarget); allMT = createMemoTableArray(paramTarget, varArray, varLen, memoTableLog); if (!allMT) { DISPLAY("MemoTable Init Error\n"); ret = 2; goto _cleanUp; } /* default strictnesses */ if (g_strictness == PARAM_UNSET) { if(g_optmode) { g_strictness = 100; } else { g_strictness = 90; } } else { if(0 >= g_strictness || g_strictness > 100) { DISPLAY("Strictness Outside of Bounds\n"); ret = 4; goto _cleanUp; } } /* use level'ing mode instead of normal target mode */ if (g_optmode) { winner.params = cParamsToPVals(ZSTD_getCParams(cLevelOpt, buf.maxBlockSize, ctx.dictSize)); if(BMK_benchParam(&winner.result, buf, ctx, winner.params)) { ret = 3; goto _cleanUp; } g_lvltarget = winner.result; g_lvltarget.cSpeed *= ((double)g_strictness) / 100; g_lvltarget.dSpeed *= ((double)g_strictness) / 100; g_lvltarget.cSize /= ((double)g_strictness) / 100; target.cSpeed = (U32)g_lvltarget.cSpeed; target.dSpeed = (U32)g_lvltarget.dSpeed; BMK_printWinnerOpt(stdout, cLevelOpt, winner.result, winner.params, target, buf.srcSize); } /* Don't want it to return anything worse than the best known result */ if (g_singleRun) { BMK_benchResult_t res; g_params = adjustParams(overwriteParams(cParamsToPVals(ZSTD_getCParams(cLevelRun, buf.maxBlockSize, ctx.dictSize)), g_params), buf.maxBlockSize, ctx.dictSize); if (BMK_benchParam(&res, buf, ctx, g_params)) { ret = 45; goto _cleanUp; } if(compareResultLT(winner.result, res, relaxTarget(target), buf.srcSize)) { winner.result = res; winner.params = g_params; } } /* bench */ DISPLAYLEVEL(2, "\r%79s\r", ""); if(nbFiles == 1) { DISPLAYLEVEL(2, "optimizing for %s", fileNamesTable[0]); } else { DISPLAYLEVEL(2, "optimizing for %lu Files", (unsigned long)nbFiles); } if(target.cSpeed != 0) { DISPLAYLEVEL(2," - limit compression speed %u MB/s", (unsigned)(target.cSpeed >> 20)); } if(target.dSpeed != 0) { DISPLAYLEVEL(2, " - limit decompression speed %u MB/s", (unsigned)(target.dSpeed >> 20)); } if(target.cMem != (U32)-1) { DISPLAYLEVEL(2, " - limit memory %u MB", (unsigned)(target.cMem >> 20)); } DISPLAYLEVEL(2, "\n"); init_clockGranularity(); { paramValues_t CParams; /* find best solution from default params */ { const int maxSeeds = g_noSeed ? 1 : ZSTD_maxCLevel(); DEBUGOUTPUT("Strategy Selection\n"); if (paramTarget.vals[strt_ind] == PARAM_UNSET) { BMK_benchResult_t candidate; int i; for (i=1; i<=maxSeeds; i++) { int ec; CParams = overwriteParams(cParamsToPVals(ZSTD_getCParams(i, buf.maxBlockSize, ctx.dictSize)), paramTarget); ec = BMK_benchParam(&candidate, buf, ctx, CParams); BMK_printWinnerOpt(stdout, i, candidate, CParams, target, buf.srcSize); if(!ec && compareResultLT(winner.result, candidate, relaxTarget(target), buf.srcSize)) { winner.result = candidate; winner.params = CParams; } CHECKTIMEGT(ret, 0, _displayCleanUp); /* if pass time limit, stop */ /* if the current params are too slow, just stop. */ if(target.cSpeed > candidate.cSpeed * 3 / 2) { break; } } BMK_printWinnerOpt(stdout, CUSTOM_LEVEL, winner.result, winner.params, target, buf.srcSize); } } DEBUGOUTPUT("Real Opt\n"); /* start 'real' optimization */ { int bestStrategy = (int)winner.params.vals[strt_ind]; if (paramTarget.vals[strt_ind] == PARAM_UNSET) { int st = bestStrategy; int tries = g_maxTries; /* one iterations of hill climbing with the level-defined parameters. */ { winnerInfo_t const w1 = climbOnce(target, allMT, buf, ctx, winner.params); if (compareResultLT(winner.result, w1.result, target, buf.srcSize)) { winner = w1; } CHECKTIMEGT(ret, 0, _displayCleanUp); } while(st && tries > 0) { winnerInfo_t wc; DEBUGOUTPUT("StrategySwitch: %s\n", g_stratName[st]); wc = optimizeFixedStrategy(buf, ctx, target, paramBase, st, allMT, tries); if(compareResultLT(winner.result, wc.result, target, buf.srcSize)) { winner = wc; tries = g_maxTries; bestStrategy = st; } else { st = nextStrategy(st, bestStrategy); tries -= TRY_DECAY; } CHECKTIMEGT(ret, 0, _displayCleanUp); } } else { winner = optimizeFixedStrategy(buf, ctx, target, paramBase, paramTarget.vals[strt_ind], allMT, g_maxTries); } } /* no solution found */ if(winner.result.cSize == (size_t)-1) { ret = 1; DISPLAY("No feasible solution found\n"); goto _cleanUp; } /* end summary */ _displayCleanUp: if (g_displayLevel >= 0) { BMK_displayOneResult(stdout, winner, buf.srcSize); } BMK_paramValues_into_commandLine(stdout, winner.params); DISPLAYLEVEL(1, "grillParams size - optimizer completed \n"); } _cleanUp: freeContexts(ctx); freeBuffers(buf); freeMemoTableArray(allMT); return ret; } /*-************************************ * CLI parsing functions **************************************/ /** longCommandWArg() : * check if *stringPtr is the same as longCommand. * If yes, @return 1 and advances *stringPtr to the position which immediately follows longCommand. * @return 0 and doesn't modify *stringPtr otherwise. * from zstdcli.c */ static int longCommandWArg(const char** stringPtr, const char* longCommand) { size_t const comSize = strlen(longCommand); int const result = !strncmp(*stringPtr, longCommand, comSize); if (result) *stringPtr += comSize; return result; } static void errorOut(const char* msg) { DISPLAY("%s \n", msg); exit(1); } /*! readU32FromChar() : * @return : unsigned integer value read from input in `char` format. * allows and interprets K, KB, KiB, M, MB and MiB suffix. * Will also modify `*stringPtr`, advancing it to position where it stopped reading. * Note : function will exit() program if digit sequence overflows */ static unsigned readU32FromChar(const char** stringPtr) { const char errorMsg[] = "error: numeric value too large"; unsigned sign = 1; unsigned result = 0; if(**stringPtr == '-') { sign = (unsigned)-1; (*stringPtr)++; } while ((**stringPtr >='0') && (**stringPtr <='9')) { unsigned const max = (((unsigned)(-1)) / 10) - 1; if (result > max) errorOut(errorMsg); result *= 10; assert(**stringPtr >= '0'); result += (unsigned)(**stringPtr - '0'); (*stringPtr)++ ; } if ((**stringPtr=='K') || (**stringPtr=='M')) { unsigned const maxK = ((unsigned)(-1)) >> 10; if (result > maxK) errorOut(errorMsg); result <<= 10; if (**stringPtr=='M') { if (result > maxK) errorOut(errorMsg); result <<= 10; } (*stringPtr)++; /* skip `K` or `M` */ if (**stringPtr=='i') (*stringPtr)++; if (**stringPtr=='B') (*stringPtr)++; } return result * sign; } static double readDoubleFromChar(const char** stringPtr) { double result = 0, divide = 10; while ((**stringPtr >='0') && (**stringPtr <='9')) { result *= 10, result += **stringPtr - '0', (*stringPtr)++ ; } if(**stringPtr!='.') { return result; } (*stringPtr)++; while ((**stringPtr >='0') && (**stringPtr <='9')) { result += (double)(**stringPtr - '0') / divide, divide *= 10, (*stringPtr)++ ; } return result; } static int usage(const char* exename) { DISPLAY( "Usage :\n"); DISPLAY( " %s [arg] file\n", exename); DISPLAY( "Arguments :\n"); DISPLAY( " file : path to the file used as reference (if none, generates a compressible sample)\n"); DISPLAY( " -H/-h : Help (this text + advanced options)\n"); return 0; } static int usage_advanced(void) { DISPLAY( "\nAdvanced options :\n"); DISPLAY( " -T# : set level 1 speed objective \n"); DISPLAY( " -B# : cut input into blocks of size # (default : single block) \n"); DISPLAY( " --optimize= : same as -O with more verbose syntax (see README.md)\n"); DISPLAY( " -S : Single run \n"); DISPLAY( " --zstd : Single run, parameter selection same as zstdcli \n"); DISPLAY( " -P# : generated sample compressibility (default : %.1f%%) \n", COMPRESSIBILITY_DEFAULT * 100); DISPLAY( " -t# : Caps runtime of operation in seconds (default : %u seconds (%.1f hours)) \n", (unsigned)g_timeLimit_s, (double)g_timeLimit_s / 3600); DISPLAY( " -v : Prints Benchmarking output\n"); DISPLAY( " -D : Next argument dictionary file\n"); DISPLAY( " -s : Seperate Files\n"); return 0; } static int badusage(const char* exename) { DISPLAY("Wrong parameters\n"); usage(exename); return 1; } #define PARSE_SUB_ARGS(stringLong, stringShort, variable) { \ if ( longCommandWArg(&argument, stringLong) \ || longCommandWArg(&argument, stringShort) ) { \ variable = readU32FromChar(&argument); \ if (argument[0]==',') { \ argument++; continue; \ } else break; \ } } /* 1 if successful parse, 0 otherwise */ static int parse_params(const char** argptr, paramValues_t* pv) { int matched = 0; const char* argOrig = *argptr; varInds_t v; for(v = 0; v < NUM_PARAMS; v++) { if ( longCommandWArg(argptr,g_shortParamNames[v]) || longCommandWArg(argptr, g_paramNames[v]) ) { if(**argptr == '=') { (*argptr)++; pv->vals[v] = readU32FromChar(argptr); matched = 1; break; } } /* reset and try again */ *argptr = argOrig; } return matched; } /*-************************************ * Main **************************************/ int main(int argc, const char** argv) { int i, filenamesStart=0, result; const char* exename=argv[0]; const char* input_filename = NULL; const char* dictFileName = NULL; U32 main_pause = 0; int cLevelOpt = 0, cLevelRun = 0; int seperateFiles = 0; double compressibility = COMPRESSIBILITY_DEFAULT; U32 memoTableLog = PARAM_UNSET; constraint_t target = { 0, 0, (U32)-1 }; paramValues_t paramTarget = emptyParams(); g_params = emptyParams(); assert(argc>=1); /* for exename */ for(i=1; i<argc; i++) { const char* argument = argv[i]; DEBUGOUTPUT("%d: %s\n", i, argument); assert(argument != NULL); if(!strcmp(argument,"--no-seed")) { g_noSeed = 1; continue; } if (longCommandWArg(&argument, "--optimize=")) { g_optimizer = 1; for ( ; ;) { if(parse_params(&argument, ¶mTarget)) { if(argument[0] == ',') { argument++; continue; } else break; } PARSE_SUB_ARGS("compressionSpeed=" , "cSpeed=", target.cSpeed); PARSE_SUB_ARGS("decompressionSpeed=", "dSpeed=", target.dSpeed); PARSE_SUB_ARGS("compressionMemory=" , "cMem=", target.cMem); PARSE_SUB_ARGS("strict=", "stc=", g_strictness); PARSE_SUB_ARGS("maxTries=", "tries=", g_maxTries); PARSE_SUB_ARGS("memoLimitLog=", "memLog=", memoTableLog); if (longCommandWArg(&argument, "level=") || longCommandWArg(&argument, "lvl=")) { cLevelOpt = (int)readU32FromChar(&argument); g_optmode = 1; if (argument[0]==',') { argument++; continue; } else break; } if (longCommandWArg(&argument, "speedForRatio=") || longCommandWArg(&argument, "speedRatio=")) { g_ratioMultiplier = readDoubleFromChar(&argument); if (argument[0]==',') { argument++; continue; } else break; } DISPLAY("invalid optimization parameter \n"); return 1; } if (argument[0] != 0) { DISPLAY("invalid --optimize= format\n"); return 1; /* check the end of string */ } continue; } else if (longCommandWArg(&argument, "--zstd=")) { /* Decode command (note : aggregated commands are allowed) */ g_singleRun = 1; for ( ; ;) { if(parse_params(&argument, &g_params)) { if(argument[0] == ',') { argument++; continue; } else break; } if (longCommandWArg(&argument, "level=") || longCommandWArg(&argument, "lvl=")) { cLevelRun = (int)readU32FromChar(&argument); g_params = emptyParams(); if (argument[0]==',') { argument++; continue; } else break; } DISPLAY("invalid compression parameter \n"); return 1; } if (argument[0] != 0) { DISPLAY("invalid --zstd= format\n"); return 1; /* check the end of string */ } continue; /* if not return, success */ } else if (longCommandWArg(&argument, "--display=")) { /* Decode command (note : aggregated commands are allowed) */ memset(g_silenceParams, 1, sizeof(g_silenceParams)); for ( ; ;) { int found = 0; varInds_t v; for(v = 0; v < NUM_PARAMS; v++) { if(longCommandWArg(&argument, g_shortParamNames[v]) || longCommandWArg(&argument, g_paramNames[v])) { g_silenceParams[v] = 0; found = 1; } } if(longCommandWArg(&argument, "compressionParameters") || longCommandWArg(&argument, "cParams")) { for(v = 0; v <= strt_ind; v++) { g_silenceParams[v] = 0; } found = 1; } if(found) { if(argument[0]==',') { continue; } else { break; } } DISPLAY("invalid parameter name parameter \n"); return 1; } if (argument[0] != 0) { DISPLAY("invalid --display format\n"); return 1; /* check the end of string */ } continue; } else if (argument[0]=='-') { argument++; while (argument[0]!=0) { switch(argument[0]) { /* Display help on usage */ case 'h' : case 'H': usage(exename); usage_advanced(); return 0; /* Pause at the end (hidden option) */ case 'p': main_pause = 1; argument++; break; /* Sample compressibility (when no file provided) */ case 'P': argument++; { U32 const proba32 = readU32FromChar(&argument); compressibility = (double)proba32 / 100.; } break; /* Run Single conf */ case 'S': g_singleRun = 1; argument++; for ( ; ; ) { switch(*argument) { case 'w': argument++; g_params.vals[wlog_ind] = readU32FromChar(&argument); continue; case 'c': argument++; g_params.vals[clog_ind] = readU32FromChar(&argument); continue; case 'h': argument++; g_params.vals[hlog_ind] = readU32FromChar(&argument); continue; case 's': argument++; g_params.vals[slog_ind] = readU32FromChar(&argument); continue; case 'l': /* search length */ argument++; g_params.vals[mml_ind] = readU32FromChar(&argument); continue; case 't': /* target length */ argument++; g_params.vals[tlen_ind] = readU32FromChar(&argument); continue; case 'S': /* strategy */ argument++; g_params.vals[strt_ind] = readU32FromChar(&argument); continue; case 'f': /* forceAttachDict */ argument++; g_params.vals[fadt_ind] = readU32FromChar(&argument); continue; case 'L': { argument++; cLevelRun = (int)readU32FromChar(&argument); g_params = emptyParams(); continue; } default : ; } break; } break; /* target level1 speed objective, in MB/s */ case 'T': argument++; g_target = readU32FromChar(&argument); break; /* cut input into blocks */ case 'B': argument++; g_blockSize = readU32FromChar(&argument); DISPLAY("using %u KB block size \n", (unsigned)(g_blockSize>>10)); break; /* caps runtime (in seconds) */ case 't': argument++; g_timeLimit_s = readU32FromChar(&argument); break; case 's': argument++; seperateFiles = 1; break; case 'q': while (argument[0] == 'q') { argument++; g_displayLevel--; } break; case 'v': while (argument[0] == 'v') { argument++; g_displayLevel++; } break; /* load dictionary file (only applicable for optimizer rn) */ case 'D': if(i == argc - 1) { /* last argument, return error. */ DISPLAY("Dictionary file expected but not given : %d\n", i); return 1; } else { i++; dictFileName = argv[i]; argument += strlen(argument); } break; /* Unknown command */ default : return badusage(exename); } } continue; } /* if (argument[0]=='-') */ /* first provided filename is input */ if (!input_filename) { input_filename=argument; filenamesStart=i; continue; } } /* Welcome message */ DISPLAYLEVEL(2, WELCOME_MESSAGE); if (filenamesStart==0) { if (g_optimizer) { DISPLAY("Optimizer Expects File\n"); return 1; } else { result = benchSample(compressibility, cLevelRun); } } else { if(seperateFiles) { for(i = 0; i < argc - filenamesStart; i++) { if (g_optimizer) { result = optimizeForSize(argv+filenamesStart + i, 1, dictFileName, target, paramTarget, cLevelOpt, cLevelRun, memoTableLog); if(result) { DISPLAY("Error on File %d", i); return result; } } else { result = benchFiles(argv+filenamesStart + i, 1, dictFileName, cLevelRun); if(result) { DISPLAY("Error on File %d", i); return result; } } } } else { if (g_optimizer) { assert(filenamesStart < argc); result = optimizeForSize(argv+filenamesStart, (size_t)(argc-filenamesStart), dictFileName, target, paramTarget, cLevelOpt, cLevelRun, memoTableLog); } else { result = benchFiles(argv+filenamesStart, argc-filenamesStart, dictFileName, cLevelRun); } } } if (main_pause) { int unused; printf("press enter...\n"); unused = getchar(); (void)unused; } return result; }