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master
tests/cpp/misc/base.cc
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mozga
[master][clang-format] Re-format cc. .h. .cu files; cond. (#20704)
19 ноя 2021, 11:27
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19 ноя 2021, 11:27
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/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. */ #include <gtest/gtest.h> #include <mxnet/base.h> using namespace mxnet; using namespace std; /* * Test that different Context have different hash values */ TEST(ContextHashTest, ContextHashUnique) { set<size_t> hashes; size_t collision_count = 0; size_t total = 0; for (size_t dev_type = 0; dev_type < 32; ++dev_type) { for (size_t dev_id = 0; dev_id < 64; ++dev_id) { auto ctx = Context::Create(static_cast<Context::DeviceType>(dev_type), dev_id); size_t res = std::hash<Context>()(ctx); auto insert_res = hashes.insert(res); if (!insert_res.second) ++collision_count; ++total; } } double collision = collision_count / static_cast<double>(total); cout << "mxnet::Context std::hash collision ratio: " << collision << endl; EXPECT_LE(collision, 0.04); }