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// Copyright 2021 the V8 project 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 <memory>
#include <string>
#include "base/time/time.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "testing/perf/perf_result_reporter.h"
#include "third_party/blink/renderer/platform/heap/garbage_collected.h"
#include "third_party/blink/renderer/platform/heap/heap_test_utilities.h"
#include "third_party/blink/renderer/platform/heap/thread_state_scopes.h"
#include "third_party/blink/renderer/platform/heap/trace_traits.h"
namespace blink {
namespace {
class AllocationPerfTest : public TestSupportingGC {};
class TinyObject final : public GarbageCollected<TinyObject> {
public:
void Trace(Visitor*) const {}
};
class LargeObject final : public GarbageCollected<LargeObject> {
static constexpr size_t kLargeObjectSizeThreshold =
cppgc::internal::api_constants::kLargeObjectSizeThreshold;
public:
void Trace(Visitor*) const {}
char padding[kLargeObjectSizeThreshold + 1];
};
template <typename Callback>
base::TimeDelta TimedRun(Callback callback) {
const auto start = base::TimeTicks::Now();
callback();
return base::TimeTicks::Now() - start;
}
constexpr char kMetricPrefix[] = "Allocation.";
constexpr char kMetricThroughput[] = "throughput";
perf_test::PerfResultReporter SetUpReporter(const std::string& story_name) {
perf_test::PerfResultReporter reporter(kMetricPrefix, story_name);
reporter.RegisterImportantMetric(kMetricThroughput, "Mbytes/s");
return reporter;
}
} // namespace
template <>
struct ThreadingTrait<TinyObject> {
STATIC_ONLY(ThreadingTrait);
static const ThreadAffinity kAffinity = ThreadAffinity::kMainThreadOnly;
};
template <>
struct ThreadingTrait<LargeObject> {
STATIC_ONLY(ThreadingTrait);
static const ThreadAffinity kAffinity = ThreadAffinity::kMainThreadOnly;
};
TEST_F(AllocationPerfTest, Allocate10MTiny) {
constexpr size_t kTargetMemoryBytes = 10 * 1024 * 1024;
constexpr size_t kObjectBytes = sizeof(TinyObject);
constexpr size_t kNumObjects = kTargetMemoryBytes / kObjectBytes;
ThreadState* thread_state = ThreadState::Current();
ThreadState::GCForbiddenScope no_gc(thread_state);
auto delta = TimedRun([]() {
for (size_t i = 0; i < kNumObjects; ++i) {
MakeGarbageCollected<TinyObject>();
}
});
auto reporter = SetUpReporter("Allocate10MTiny");
reporter.AddResult(kMetricThroughput,
static_cast<double>(kNumObjects * kObjectBytes) /
(1024 * 1024) / delta.InSecondsF());
}
TEST_F(AllocationPerfTest, Allocate10MLarge) {
constexpr size_t kTargetMemoryBytes = 10 * 1024 * 1024;
constexpr size_t kObjectBytes = sizeof(LargeObject);
constexpr size_t kNumObjects = kTargetMemoryBytes / kObjectBytes + 1;
ThreadState* thread_state = ThreadState::Current();
ThreadState::GCForbiddenScope no_gc(thread_state);
auto delta = TimedRun([]() {
for (size_t i = 0; i < kNumObjects; ++i) {
MakeGarbageCollected<LargeObject>();
}
});
auto reporter = SetUpReporter("Allocate10MLarge");
reporter.AddResult(kMetricThroughput,
static_cast<double>(kNumObjects * kObjectBytes) /
(1024 * 1024) / delta.InSecondsF());
}
} // namespace blink
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