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- // Copyright (c) 2016 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- #include "base/metrics/persistent_sample_map.h"
- #include <memory>
- #include "base/memory/ptr_util.h"
- #include "base/metrics/persistent_histogram_allocator.h"
- #include "base/test/gtest_util.h"
- #include "testing/gtest/include/gtest/gtest.h"
- namespace base {
- namespace {
- std::unique_ptr<PersistentHistogramAllocator> CreateHistogramAllocator(
- size_t bytes) {
- return std::make_unique<PersistentHistogramAllocator>(
- std::make_unique<LocalPersistentMemoryAllocator>(bytes, 0, ""));
- }
- std::unique_ptr<PersistentHistogramAllocator> DuplicateHistogramAllocator(
- PersistentHistogramAllocator* original) {
- return std::make_unique<PersistentHistogramAllocator>(
- std::make_unique<PersistentMemoryAllocator>(
- const_cast<void*>(original->data()), original->length(), 0,
- original->Id(), original->Name(), false));
- }
- TEST(PersistentSampleMapTest, AccumulateTest) {
- std::unique_ptr<PersistentHistogramAllocator> allocator =
- CreateHistogramAllocator(64 << 10); // 64 KiB
- HistogramSamples::LocalMetadata meta;
- PersistentSampleMap samples(1, allocator.get(), &meta);
- samples.Accumulate(1, 100);
- samples.Accumulate(2, 200);
- samples.Accumulate(1, -200);
- EXPECT_EQ(-100, samples.GetCount(1));
- EXPECT_EQ(200, samples.GetCount(2));
- EXPECT_EQ(300, samples.sum());
- EXPECT_EQ(100, samples.TotalCount());
- EXPECT_EQ(samples.redundant_count(), samples.TotalCount());
- }
- TEST(PersistentSampleMapTest, Accumulate_LargeValuesDontOverflow) {
- std::unique_ptr<PersistentHistogramAllocator> allocator =
- CreateHistogramAllocator(64 << 10); // 64 KiB
- HistogramSamples::LocalMetadata meta;
- PersistentSampleMap samples(1, allocator.get(), &meta);
- samples.Accumulate(250000000, 100);
- samples.Accumulate(500000000, 200);
- samples.Accumulate(250000000, -200);
- EXPECT_EQ(-100, samples.GetCount(250000000));
- EXPECT_EQ(200, samples.GetCount(500000000));
- EXPECT_EQ(75000000000LL, samples.sum());
- EXPECT_EQ(100, samples.TotalCount());
- EXPECT_EQ(samples.redundant_count(), samples.TotalCount());
- }
- TEST(PersistentSampleMapTest, AddSubtractTest) {
- std::unique_ptr<PersistentHistogramAllocator> allocator1 =
- CreateHistogramAllocator(64 << 10); // 64 KiB
- HistogramSamples::LocalMetadata meta1;
- PersistentSampleMap samples1(1, allocator1.get(), &meta1);
- samples1.Accumulate(1, 100);
- samples1.Accumulate(2, 100);
- samples1.Accumulate(3, 100);
- std::unique_ptr<PersistentHistogramAllocator> allocator2 =
- DuplicateHistogramAllocator(allocator1.get());
- HistogramSamples::LocalMetadata meta2;
- PersistentSampleMap samples2(2, allocator2.get(), &meta2);
- samples2.Accumulate(1, 200);
- samples2.Accumulate(2, 200);
- samples2.Accumulate(4, 200);
- samples1.Add(samples2);
- EXPECT_EQ(300, samples1.GetCount(1));
- EXPECT_EQ(300, samples1.GetCount(2));
- EXPECT_EQ(100, samples1.GetCount(3));
- EXPECT_EQ(200, samples1.GetCount(4));
- EXPECT_EQ(2000, samples1.sum());
- EXPECT_EQ(900, samples1.TotalCount());
- EXPECT_EQ(samples1.redundant_count(), samples1.TotalCount());
- samples1.Subtract(samples2);
- EXPECT_EQ(100, samples1.GetCount(1));
- EXPECT_EQ(100, samples1.GetCount(2));
- EXPECT_EQ(100, samples1.GetCount(3));
- EXPECT_EQ(0, samples1.GetCount(4));
- EXPECT_EQ(600, samples1.sum());
- EXPECT_EQ(300, samples1.TotalCount());
- EXPECT_EQ(samples1.redundant_count(), samples1.TotalCount());
- }
- TEST(PersistentSampleMapTest, PersistenceTest) {
- std::unique_ptr<PersistentHistogramAllocator> allocator1 =
- CreateHistogramAllocator(64 << 10); // 64 KiB
- HistogramSamples::LocalMetadata meta12;
- PersistentSampleMap samples1(12, allocator1.get(), &meta12);
- samples1.Accumulate(1, 100);
- samples1.Accumulate(2, 200);
- samples1.Accumulate(1, -200);
- samples1.Accumulate(-1, 1);
- EXPECT_EQ(-100, samples1.GetCount(1));
- EXPECT_EQ(200, samples1.GetCount(2));
- EXPECT_EQ(1, samples1.GetCount(-1));
- EXPECT_EQ(299, samples1.sum());
- EXPECT_EQ(101, samples1.TotalCount());
- EXPECT_EQ(samples1.redundant_count(), samples1.TotalCount());
- std::unique_ptr<PersistentHistogramAllocator> allocator2 =
- DuplicateHistogramAllocator(allocator1.get());
- PersistentSampleMap samples2(12, allocator2.get(), &meta12);
- EXPECT_EQ(samples1.id(), samples2.id());
- EXPECT_EQ(samples1.sum(), samples2.sum());
- EXPECT_EQ(samples1.redundant_count(), samples2.redundant_count());
- EXPECT_EQ(samples1.TotalCount(), samples2.TotalCount());
- EXPECT_EQ(-100, samples2.GetCount(1));
- EXPECT_EQ(200, samples2.GetCount(2));
- EXPECT_EQ(1, samples2.GetCount(-1));
- EXPECT_EQ(299, samples2.sum());
- EXPECT_EQ(101, samples2.TotalCount());
- EXPECT_EQ(samples2.redundant_count(), samples2.TotalCount());
- samples1.Accumulate(-1, -1);
- EXPECT_EQ(0, samples2.GetCount(3));
- EXPECT_EQ(0, samples1.GetCount(3));
- samples2.Accumulate(3, 300);
- EXPECT_EQ(300, samples2.GetCount(3));
- EXPECT_EQ(300, samples1.GetCount(3));
- EXPECT_EQ(samples1.sum(), samples2.sum());
- EXPECT_EQ(samples1.redundant_count(), samples2.redundant_count());
- EXPECT_EQ(samples1.TotalCount(), samples2.TotalCount());
- EXPECT_EQ(0, samples2.GetCount(4));
- EXPECT_EQ(0, samples1.GetCount(4));
- samples1.Accumulate(4, 400);
- EXPECT_EQ(400, samples2.GetCount(4));
- EXPECT_EQ(400, samples1.GetCount(4));
- samples2.Accumulate(4, 4000);
- EXPECT_EQ(4400, samples2.GetCount(4));
- EXPECT_EQ(4400, samples1.GetCount(4));
- EXPECT_EQ(samples1.sum(), samples2.sum());
- EXPECT_EQ(samples1.redundant_count(), samples2.redundant_count());
- EXPECT_EQ(samples1.TotalCount(), samples2.TotalCount());
- }
- TEST(PersistentSampleMapIteratorTest, IterateTest) {
- std::unique_ptr<PersistentHistogramAllocator> allocator =
- CreateHistogramAllocator(64 << 10); // 64 KiB
- HistogramSamples::LocalMetadata meta;
- PersistentSampleMap samples(1, allocator.get(), &meta);
- samples.Accumulate(1, 100);
- samples.Accumulate(2, 200);
- samples.Accumulate(4, -300);
- samples.Accumulate(5, 0);
- std::unique_ptr<SampleCountIterator> it = samples.Iterator();
- HistogramBase::Sample min;
- int64_t max;
- HistogramBase::Count count;
- it->Get(&min, &max, &count);
- EXPECT_EQ(1, min);
- EXPECT_EQ(2, max);
- EXPECT_EQ(100, count);
- EXPECT_FALSE(it->GetBucketIndex(nullptr));
- it->Next();
- it->Get(&min, &max, &count);
- EXPECT_EQ(2, min);
- EXPECT_EQ(3, max);
- EXPECT_EQ(200, count);
- it->Next();
- it->Get(&min, &max, &count);
- EXPECT_EQ(4, min);
- EXPECT_EQ(5, max);
- EXPECT_EQ(-300, count);
- it->Next();
- EXPECT_TRUE(it->Done());
- }
- TEST(PersistentSampleMapIteratorTest, SkipEmptyRanges) {
- std::unique_ptr<PersistentHistogramAllocator> allocator1 =
- CreateHistogramAllocator(64 << 10); // 64 KiB
- HistogramSamples::LocalMetadata meta1;
- PersistentSampleMap samples1(1, allocator1.get(), &meta1);
- samples1.Accumulate(5, 1);
- samples1.Accumulate(10, 2);
- samples1.Accumulate(15, 3);
- samples1.Accumulate(20, 4);
- samples1.Accumulate(25, 5);
- std::unique_ptr<PersistentHistogramAllocator> allocator2 =
- DuplicateHistogramAllocator(allocator1.get());
- HistogramSamples::LocalMetadata meta2;
- PersistentSampleMap samples2(2, allocator2.get(), &meta2);
- samples2.Accumulate(5, 1);
- samples2.Accumulate(20, 4);
- samples2.Accumulate(25, 5);
- samples1.Subtract(samples2);
- std::unique_ptr<SampleCountIterator> it = samples1.Iterator();
- EXPECT_FALSE(it->Done());
- HistogramBase::Sample min;
- int64_t max;
- HistogramBase::Count count;
- it->Get(&min, &max, &count);
- EXPECT_EQ(10, min);
- EXPECT_EQ(11, max);
- EXPECT_EQ(2, count);
- it->Next();
- EXPECT_FALSE(it->Done());
- it->Get(&min, &max, &count);
- EXPECT_EQ(15, min);
- EXPECT_EQ(16, max);
- EXPECT_EQ(3, count);
- it->Next();
- EXPECT_TRUE(it->Done());
- }
- TEST(PersistentSampleMapIteratorDeathTest, IterateDoneTest) {
- std::unique_ptr<PersistentHistogramAllocator> allocator =
- CreateHistogramAllocator(64 << 10); // 64 KiB
- HistogramSamples::LocalMetadata meta;
- PersistentSampleMap samples(1, allocator.get(), &meta);
- std::unique_ptr<SampleCountIterator> it = samples.Iterator();
- EXPECT_TRUE(it->Done());
- HistogramBase::Sample min;
- int64_t max;
- HistogramBase::Count count;
- EXPECT_DCHECK_DEATH(it->Get(&min, &max, &count));
- EXPECT_DCHECK_DEATH(it->Next());
- samples.Accumulate(1, 100);
- it = samples.Iterator();
- EXPECT_FALSE(it->Done());
- }
- } // namespace
- } // namespace base
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