cf6ab6bb2b
- b527a3e4b36b644ac424e3c525b1cd393f6f6c40 Fix some typos in the usage examples by Jorg Brown <jorg@google.com>
- 82be4a9adf3bb0ddafc0d46274969c99afffe870 Fix typo in optional.h comment. by Abseil Team <absl-team@google.com>
- d6ee63bf8fc51fba074c23b33cebc28c808d7f07 Remove internal-only identifiers from code. by Daniel Katz <katzdm@google.com>
- f9c3ad2f0d73f53b21603638af8b4bed636e79f4 Use easier understandable names for absl::StartsWith and ... by Abseil Team <absl-team@google.com>
- 7c16c14fefee89c927b8789d6043c4691bcffc9b Add -Wno-missing-prototypes back to the LLVM copts. by Derek Mauro <dmauro@google.com>
- 2f4b7d2e50c7023240242f1e15db60ccd7e8768d IWYU | absl/strings by Juemin Yang <jueminyang@google.com>
- a99cbcc1daa34a2d6a2bb26de275e05173cc77e9 IWYU | absl/type by Juemin Yang <jueminyang@google.com>
- 12e1146d0fc76c071d7e0ebaabb62f0a984fae66 Use LLVM_FLAGS and LLVM_TEST_FLAGS when --compiler=llvm. by Derek Mauro <dmauro@google.com>
- cd6bea616abda558d0bace5bd77455662a233688 IWYU | absl/debugging by Juemin Yang <jueminyang@google.com>
- d9a7382e59d46a8581b6b7a31cd5a48bb89326e9 IWYU | absl/synchronization by Juemin Yang <jueminyang@google.com>
- 07ec7d6d5a4a666f4183c5d0ed9c342baa7b24bc IWYU | absl/numeric by Juemin Yang <jueminyang@google.com>
- 12bfe40051f4270f8707e191af5652f83f2f750c Remove the RoundTrip{Float,Double}ToBuffer routines from ... by Jorg Brown <jorg@google.com>
- eeb4fd67c9d97f66cb9475c3c5e51ab132f1c810 Adds conversion functions for converting between absl/tim... by Greg Miller <jgm@google.com>
- 59a2108d05d4ea85dc5cc11e49b2cd2335d4295a Change Substitute to use %.6g formatting rather than 15/1... by Jorg Brown <jorg@google.com>
- 394becb48e0fcd161642cdaac5120d32567e0ef8 IWYU | absl/meta by Juemin Yang <jueminyang@google.com>
- 1e5da6e8da336699b2469dcf6dda025b9b0ec4c9 Rewrite atomic_hook.h to not use std::atomic<T*> under Wi... by Greg Falcon <gfalcon@google.com>
GitOrigin-RevId: b527a3e4b36b644ac424e3c525b1cd393f6f6c40
Change-Id: I14e331d91c956ef045ac7927091a9f179716de0c
98 lines
2.9 KiB
C++
98 lines
2.9 KiB
C++
// Copyright 2017 The Abseil Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "absl/base/internal/sysinfo.h"
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#ifndef _WIN32
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#include <sys/types.h>
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#include <unistd.h>
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#endif
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#include <thread> // NOLINT(build/c++11)
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#include <unordered_set>
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#include <vector>
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#include "gtest/gtest.h"
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#include "absl/synchronization/barrier.h"
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#include "absl/synchronization/mutex.h"
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namespace absl {
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namespace base_internal {
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namespace {
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TEST(SysinfoTest, NumCPUs) {
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EXPECT_NE(NumCPUs(), 0)
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<< "NumCPUs() should not have the default value of 0";
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}
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TEST(SysinfoTest, NominalCPUFrequency) {
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#if !(defined(__aarch64__) && defined(__linux__))
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EXPECT_GE(NominalCPUFrequency(), 1000.0)
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<< "NominalCPUFrequency() did not return a reasonable value";
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#else
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// TODO(absl-team): Aarch64 cannot read the CPU frequency from sysfs, so we
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// get back 1.0. Fix once the value is available.
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EXPECT_EQ(NominalCPUFrequency(), 1.0)
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<< "CPU frequency detection was fixed! Please update unittest.";
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#endif
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}
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TEST(SysinfoTest, GetTID) {
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EXPECT_EQ(GetTID(), GetTID()); // Basic compile and equality test.
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#ifdef __native_client__
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// Native Client has a race condition bug that leads to memory
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// exaustion when repeatedly creating and joining threads.
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// https://bugs.chromium.org/p/nativeclient/issues/detail?id=1027
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return;
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#endif
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// Test that TIDs are unique to each thread.
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// Uses a few loops to exercise implementations that reallocate IDs.
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for (int i = 0; i < 32; ++i) {
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constexpr int kNumThreads = 64;
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Barrier all_threads_done(kNumThreads);
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std::vector<std::thread> threads;
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Mutex mutex;
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std::unordered_set<pid_t> tids;
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for (int j = 0; j < kNumThreads; ++j) {
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threads.push_back(std::thread([&]() {
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pid_t id = GetTID();
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{
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MutexLock lock(&mutex);
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ASSERT_TRUE(tids.find(id) == tids.end());
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tids.insert(id);
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}
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// We can't simply join the threads here. The threads need to
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// be alive otherwise the TID might have been reallocated to
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// another live thread.
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all_threads_done.Block();
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}));
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}
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for (auto& thread : threads) {
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thread.join();
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}
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}
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}
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#ifdef __linux__
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TEST(SysinfoTest, LinuxGetTID) {
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// On Linux, for the main thread, GetTID()==getpid() is guaranteed by the API.
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EXPECT_EQ(GetTID(), getpid());
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}
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#endif
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} // namespace
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} // namespace base_internal
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} // namespace absl
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