chromium/third_party/dawn/src/dawn/tests/white_box/QueryInternalShaderTests.cpp

// Copyright 2020 The Dawn & Tint Authors
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#include <vector>

#include "dawn/native/Buffer.h"
#include "dawn/native/CommandEncoder.h"
#include "dawn/native/QueryHelper.h"
#include "dawn/tests/DawnTest.h"
#include "dawn/utils/WGPUHelpers.h"

namespace dawn {
namespace {

void EncodeConvertTimestampsToNanoseconds(wgpu::CommandEncoder encoder,
                                          wgpu::Buffer timestamps,
                                          wgpu::Buffer availability,
                                          wgpu::Buffer params) { … }

class InternalShaderExpectation : public ::dawn::detail::Expectation { … };

constexpr static uint64_t kSentinelValue = …;

class QueryInternalShaderTests : public DawnTest { … };

// Test the accuracy of timestamp compute shader which uses unsigned 32-bit integers to simulate
// unsigned 64-bit integers (timestamps) multiplied by float (period).
// The arguments pass to timestamp internal pipeline:
// - The timestamps buffer contains the original timestamps resolved from query set (created
//   manually here), and will be used to store the results processed by the compute shader.
//   Expect 0 for unavailable timestamps and nanoseconds for available timestamps in an expected
//   error tolerance ratio.
// - The availability buffer passes the data of which slot in timestamps buffer is an initialized
//    timestamp.
// - The params buffer passes the timestamp count, the offset in timestamps buffer and the
//   timestamp period (here use GPU frequency (HZ) on Intel D3D12 to calculate the period in
//   ns for testing).
TEST_P(QueryInternalShaderTests, TimestampComputeShaderMultiplication) { … }

TEST_P(QueryInternalShaderTests, TimestampComputeShaderQuantization) { … }

DAWN_INSTANTIATE_TEST(…);

}  // anonymous namespace
}  // namespace dawn