1 files changed, 195 insertions, 0 deletions
diff --git a/dom/webgpu/tests/cts/checkout/src/stress/shaders/slow.spec.ts b/dom/webgpu/tests/cts/checkout/src/stress/shaders/slow.spec.ts
new file mode 100644
index 0000000000..9359b976a3
--- /dev/null
+++ b/dom/webgpu/tests/cts/checkout/src/stress/shaders/slow.spec.ts
@@ -0,0 +1,195 @@
+export const description = `
+Stress tests covering robustness in the presence of slow shaders.
+`;
+
+import { makeTestGroup } from '../../common/framework/test_group.js';
+import { GPUTest } from '../../webgpu/gpu_test.js';
+
+export const g = makeTestGroup(GPUTest);
+
+g.test('compute')
+  .desc(`Tests execution of compute passes with very long-running dispatch operations.`)
+  .fn(async t => {
+    const kDispatchSize = 1000;
+    const data = new Uint32Array(kDispatchSize);
+    const buffer = t.makeBufferWithContents(data, GPUBufferUsage.STORAGE | GPUBufferUsage.COPY_SRC);
+    const module = t.device.createShaderModule({
+      code: `
+        struct Buffer { data: array<u32>, };
+        @group(0) @binding(0) var<storage, read_write> buffer: Buffer;
+        @compute @workgroup_size(1) fn main(
+            @builtin(global_invocation_id) id: vec3<u32>) {
+          loop {
+            if (buffer.data[id.x] == 1000000u) {
+              break;
+            }
+            buffer.data[id.x] = buffer.data[id.x] + 1u;
+          }
+        }
+      `,
+    });
+    const pipeline = t.device.createComputePipeline({
+      layout: 'auto',
+      compute: { module, entryPoint: 'main' },
+    });
+    const encoder = t.device.createCommandEncoder();
+    const pass = encoder.beginComputePass();
+    pass.setPipeline(pipeline);
+    const bindGroup = t.device.createBindGroup({
+      layout: pipeline.getBindGroupLayout(0),
+      entries: [{ binding: 0, resource: { buffer } }],
+    });
+    pass.setBindGroup(0, bindGroup);
+    pass.dispatchWorkgroups(kDispatchSize);
+    pass.end();
+    t.device.queue.submit([encoder.finish()]);
+    t.expectGPUBufferValuesEqual(buffer, new Uint32Array(new Array(kDispatchSize).fill(1000000)));
+  });
+
+g.test('vertex')
+  .desc(`Tests execution of render passes with a very long-running vertex stage.`)
+  .fn(async t => {
+    const module = t.device.createShaderModule({
+      code: `
+        struct Data { counter: u32, increment: u32, };
+        @group(0) @binding(0) var<uniform> data: Data;
+        @vertex fn vmain() -> @builtin(position) vec4<f32> {
+          var counter: u32 = data.counter;
+          loop {
+            counter = counter + data.increment;
+            if (counter % 50000000u == 0u) {
+              break;
+            }
+          }
+          return vec4<f32>(1.0, 1.0, 0.0, f32(counter));
+        }
+        @fragment fn fmain() -> @location(0) vec4<f32> {
+          return vec4<f32>(1.0, 1.0, 0.0, 1.0);
+        }
+      `,
+    });
+
+    const pipeline = t.device.createRenderPipeline({
+      layout: 'auto',
+      vertex: { module, entryPoint: 'vmain', buffers: [] },
+      primitive: { topology: 'point-list' },
+      fragment: {
+        targets: [{ format: 'rgba8unorm' }],
+        module,
+        entryPoint: 'fmain',
+      },
+    });
+    const uniforms = t.makeBufferWithContents(new Uint32Array([0, 1]), GPUBufferUsage.UNIFORM);
+    const bindGroup = t.device.createBindGroup({
+      layout: pipeline.getBindGroupLayout(0),
+      entries: [
+        {
+          binding: 0,
+          resource: { buffer: uniforms },
+        },
+      ],
+    });
+    const renderTarget = t.device.createTexture({
+      size: [3, 3],
+      usage: GPUTextureUsage.RENDER_ATTACHMENT | GPUTextureUsage.COPY_SRC,
+      format: 'rgba8unorm',
+    });
+    const encoder = t.device.createCommandEncoder();
+    const pass = encoder.beginRenderPass({
+      colorAttachments: [
+        {
+          view: renderTarget.createView(),
+          clearValue: [0, 0, 0, 0],
+          loadOp: 'clear',
+          storeOp: 'store',
+        },
+      ],
+    });
+    pass.setPipeline(pipeline);
+    pass.setBindGroup(0, bindGroup);
+    pass.draw(1);
+    pass.end();
+    t.device.queue.submit([encoder.finish()]);
+    t.expectSinglePixelIn2DTexture(
+      renderTarget,
+      'rgba8unorm',
+      { x: 1, y: 1 },
+      {
+        exp: new Uint8Array([255, 255, 0, 255]),
+      }
+    );
+  });
+
+g.test('fragment')
+  .desc(`Tests execution of render passes with a very long-running fragment stage.`)
+  .fn(async t => {
+    const module = t.device.createShaderModule({
+      code: `
+        struct Data { counter: u32, increment: u32, };
+        @group(0) @binding(0) var<uniform> data: Data;
+        @vertex fn vmain() -> @builtin(position) vec4<f32> {
+          return vec4<f32>(0.0, 0.0, 0.0, 1.0);
+        }
+        @fragment fn fmain() -> @location(0) vec4<f32> {
+          var counter: u32 = data.counter;
+          loop {
+            counter = counter + data.increment;
+            if (counter % 50000000u == 0u) {
+              break;
+            }
+          }
+          return vec4<f32>(1.0, 1.0, 1.0 / f32(counter), 1.0);
+        }
+      `,
+    });
+
+    const pipeline = t.device.createRenderPipeline({
+      layout: 'auto',
+      vertex: { module, entryPoint: 'vmain', buffers: [] },
+      primitive: { topology: 'point-list' },
+      fragment: {
+        targets: [{ format: 'rgba8unorm' }],
+        module,
+        entryPoint: 'fmain',
+      },
+    });
+    const uniforms = t.makeBufferWithContents(new Uint32Array([0, 1]), GPUBufferUsage.UNIFORM);
+    const bindGroup = t.device.createBindGroup({
+      layout: pipeline.getBindGroupLayout(0),
+      entries: [
+        {
+          binding: 0,
+          resource: { buffer: uniforms },
+        },
+      ],
+    });
+    const renderTarget = t.device.createTexture({
+      size: [3, 3],
+      usage: GPUTextureUsage.RENDER_ATTACHMENT | GPUTextureUsage.COPY_SRC,
+      format: 'rgba8unorm',
+    });
+    const encoder = t.device.createCommandEncoder();
+    const pass = encoder.beginRenderPass({
+      colorAttachments: [
+        {
+          view: renderTarget.createView(),
+          clearValue: [0, 0, 0, 0],
+          loadOp: 'clear',
+          storeOp: 'store',
+        },
+      ],
+    });
+    pass.setPipeline(pipeline);
+    pass.setBindGroup(0, bindGroup);
+    pass.draw(1);
+    pass.end();
+    t.device.queue.submit([encoder.finish()]);
+    t.expectSinglePixelIn2DTexture(
+      renderTarget,
+      'rgba8unorm',
+      { x: 1, y: 1 },
+      {
+        exp: new Uint8Array([255, 255, 0, 255]),
+      }
+    );
+  });