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// Copyright 2025 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "gpu/command_buffer/service/dawn_platform.h"
#include "base/test/metrics/histogram_tester.h"
#include "base/test/task_environment.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace gpu::webgpu {
class DawnPlatformTest : public testing::Test {
public:
DawnPlatformTest()
: task_environment_(base::test::TaskEnvironment::TimeSource::MOCK_TIME) {}
protected:
base::test::TaskEnvironment task_environment_;
base::HistogramTester histogram_tester_;
};
TEST_F(DawnPlatformTest, RecordsCacheHistogramsAfterDelay) {
DawnPlatform platform(nullptr, nullptr, "GPU.GraphiteDawn.", true);
// Simulate some cache hits and misses.
platform.HistogramCustomCounts("D3D11.CompileShader.CacheHit", 1, 1, 100, 50);
platform.HistogramCustomCounts("D3D11.CompileShader.CacheHit", 1, 1, 100, 50);
platform.HistogramCustomCounts("D3D11.CompileShader.CacheMiss", 1, 1, 100,
50);
// The histograms should not be recorded yet.
histogram_tester_.ExpectTotalCount(
"GPU.GraphiteDawn.D3D11.CompileShader.CacheHit.Counts."
"90SecondsPostStartup",
0);
histogram_tester_.ExpectTotalCount(
"GPU.GraphiteDawn.D3D11.CompileShader.CacheMiss.Counts."
"90SecondsPostStartup",
0);
histogram_tester_.ExpectTotalCount(
"GPU.GraphiteDawn.D3D11.CompileShader.CacheHit.Percentage."
"90SecondsPostStartup",
0);
// Fast forward time by 90 seconds to trigger the delayed task.
task_environment_.FastForwardBy(base::Seconds(90));
// Now, the histograms should be recorded.
histogram_tester_.ExpectUniqueSample(
"GPU.GraphiteDawn.D3D11.CompileShader.CacheHit.Counts."
"90SecondsPostStartup",
2, 1);
histogram_tester_.ExpectUniqueSample(
"GPU.GraphiteDawn.D3D11.CompileShader.CacheMiss.Counts."
"90SecondsPostStartup",
1, 1);
// 2 hits / (2 hits + 1 miss) = 66%
histogram_tester_.ExpectUniqueSample(
"GPU.GraphiteDawn.D3D11.CompileShader.CacheHit.Percentage."
"90SecondsPostStartup",
66, 1);
}
TEST_F(DawnPlatformTest, RecordsCacheHistogramsOnFramePresented) {
DawnPlatform platform(nullptr, nullptr, "GPU.GraphiteDawn.", true);
// Simulate some cache hits and misses.
platform.HistogramCustomCounts("D3D11.CompileShader.CacheHit", 1, 1, 100, 50);
platform.HistogramCustomCounts("D3D11.CompileShader.CacheHit", 1, 1, 100, 50);
platform.HistogramCustomCounts("D3D11.CompileShader.CacheMiss", 1, 1, 100,
50);
// The histograms should not be recorded yet.
histogram_tester_.ExpectTotalCount(
"GPU.GraphiteDawn.D3D11.CompileShader.CacheHit.Counts.1stPresent", 0);
histogram_tester_.ExpectTotalCount(
"GPU.GraphiteDawn.D3D11.CompileShader.CacheHit.Percentage.1stPresent", 0);
// Call OnFramePresented to trigger histogram recording.
platform.OnFramePresented();
// Now, the histograms should be recorded.
histogram_tester_.ExpectUniqueSample(
"GPU.GraphiteDawn.D3D11.CompileShader.CacheHit.Counts.1stPresent", 2, 1);
// 2 hits / (2 hits + 1 miss) = 66%
histogram_tester_.ExpectUniqueSample(
"GPU.GraphiteDawn.D3D11.CompileShader.CacheHit.Percentage.1stPresent", 66,
1);
// Call OnFramePresented again and check that histograms are not recorded a
// second time.
platform.OnFramePresented();
histogram_tester_.ExpectUniqueSample(
"GPU.GraphiteDawn.D3D11.CompileShader.CacheHit.Counts.1stPresent", 2, 1);
histogram_tester_.ExpectUniqueSample(
"GPU.GraphiteDawn.D3D11.CompileShader.CacheHit.Percentage.1stPresent", 66,
1);
}
} // namespace gpu::webgpu
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