chromium_src/third_party/blink/perf_tests/webgpu/async-2-map-read-after-unrelated-submit.html · OpenHarmony-TPC/chromium_src - AtomGit

<!DOCTYPE html>
<html>

<head>
  <title>
    Time mapAsync READ after a submit that doesn't use the buffer
  </title>
  <script src="../resources/runner.js"></script>
  <script src="./resources/webgpu-perf-utils.js"></script>
</head>

<body>
  <script>
    (async () => {
      const adapter = await getAdapter();
      const device = await adapter.requestDevice();
      const mappableBuffer = device.createBuffer({
        size: 4,
        usage: GPUBufferUsage.MAP_READ | GPUBufferUsage.COPY_DST,
      });
      const otherBuffer1 = device.createBuffer({
        size: 4,
        usage: GPUBufferUsage.COPY_DST | GPUBufferUsage.COPY_SRC,
      });
      const otherBuffer2 = device.createBuffer({
        size: 4,
        usage: GPUBufferUsage.COPY_DST | GPUBufferUsage.COPY_SRC,
      });

      // Wait to make sure the device is fully ready
      await device.queue.onSubmittedWorkDone();

      PerfTestRunner.startMeasureValuesAsync({
        unit: 'ms',
        warmUpCount: 1,
        iterationCount: 15,
        ...loopTestForTime(250, async () => {
          // Enqueue some work that mapAsync must wait for
          const enc = device.createCommandEncoder();
          enc.copyBufferToBuffer(otherBuffer1, 0, otherBuffer2, 0, 4);
          device.queue.submit([enc.finish()]);
          // Map the buffer
          await mappableBuffer.mapAsync(GPUMapMode.READ);
          mappableBuffer.getMappedRange();
          mappableBuffer.unmap();
        }),
      });
    })();
  </script>
</body>

</html>