WebGPU compute

webgpu.compute

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Selected signal results for external comparison. Field statuses, controls and exact values are retained.

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// Test source pending.

Definition

Integer, float, subgroup and immediate readback challenges retain outputs and controls. Subgroup lane mapping is investigation evidence.

Find it in the repository

Collector source: core/signals/webgpu/compute.ts
Export: measurementModule · Signal object
Field definitions: core/definitions/webgpu/compute.ts
Capture membership: Product capture · common/capture/product.ts
Page registration: app/signals/registry.ts
Field projection: core/results/measurement.ts

Execution contract

Signal: webgpu.compute
Collector: webgpu.compute
API / surface: core/signals/webgpu/compute.ts
Timeout: 2000 ms
Companion signals: webgpu.capabilities
Fixture inputs: Inline owned corpora (listed below)

program-integer · sha256:f288b06ff944366ca3c67e56e056d3206a075c9766a6e32a67ae2d51b26e9f2c
program-float · sha256:49f7ca9f4b21499907e0537b5ae9fce7e99acc0e3985e1edf43993ef6b5482f2
program-linear · sha256:427bc6b5c236a7349d9dcad698befb018cee1e1e3537a21db510e6f794408c4b
program-subgroups · sha256:b364258ceb4e60fb9e0f939b7526ae4ef76a5b03ea44cba9bf617f2d501f60b2
program-subgroupIndices · sha256:4cd24e6140d2ee3c369f61b80ac9127242f788fac5283e696f68f7ae06a277d8
program-subgroupSize1 · sha256:0bab3370c6eaada9225fc8cf20d66fa8f96a5ee7630d582035a290f941c4daf5
program-subgroupSize2 · sha256:f124b6a8c9dbf41d23f7892c1a23ff5b6443d552ffef455461fb02646a5490b6
program-subgroupSize4 · sha256:6b174e05ae587c37a87ad8b69eaf79f902ab49755e5f29b8c1d5bf9241577c12
program-subgroupSize8 · sha256:948c459d98adf3efc7145218dbcc2cb28171a0cb0ceeda68a38e30cc15165d99
program-subgroupSize16 · sha256:b598e82f17fb377d51ba994cc41c5f3ba5293705411cd467deeb2b18378f19ed
program-subgroupSize32 · sha256:d8ce9b60e397baa04ffe2990bb67ca7cba2e25cdb95e4864ee8f13a10c991602
program-subgroupSize64 · sha256:76d64516cb9cd3c3a906f6ffa9a63e9874a1ebe34c2e0216cd54647cc3544de1
program-subgroupSize128 · sha256:2634acc9549293a6d79fd6ac1b7db59c79bb22ac8092de2bbe2421db13e7990e
program-immediates · sha256:d0f027cc732c0d0e3498f1fab0fca7436e00afb97e88c55f3e1d1604144bdbd6

Exact request inputs

[
  {
    "key": "webgpu.compute.integer-grid",
    "inputs": {
      "integer-grid": {
        "workgroup": [
          4,
          2,
          1
        ],
        "dispatch": [
          2,
          2,
          1
        ],
        "formula": "x + 17*y + 3",
        "initial": 4294967295,
        "lanes": 32
      }
    },
    "controls": {
      "integer-grid": [
        {
          "relationshipId": "E02.integer-grid",
          "class": "required",
          "preconditions": [
            "advertised feature and successful dispatch; no assumed subgroup lane order"
          ]
        }
      ]
    }
  },
  {
    "key": "webgpu.compute.float-corpus",
    "inputs": {
      "float-corpus": {
        "x": "(index+1)/10",
        "expression": "sqrt(x)*sin(x)+x/3",
        "lanes": 8,
        "dispatch": [
          1,
          1,
          1
        ],
        "initial": 4294967295
      }
    },
    "controls": {
      "float-corpus": [
        {
          "relationshipId": "E02.float-response",
          "class": "empirical",
          "preconditions": [
            "advertised feature and successful dispatch; no assumed subgroup lane order"
          ]
        }
      ]
    }
  },
  {
    "key": "webgpu.compute.linear-indices",
    "inputs": {
      "linear-indices": {
        "workgroup": [
          4,
          2,
          1
        ],
        "dispatch": [
          2,
          2,
          1
        ],
        "lanes": 64,
        "initial": 4294967295
      }
    },
    "controls": {
      "linear-indices": [
        {
          "relationshipId": "E02.linear-indices",
          "class": "required",
          "preconditions": [
            "advertised feature and successful dispatch; no assumed subgroup lane order"
          ]
        }
      ]
    }
  },
  {
    "key": "webgpu.compute.subgroups",
    "inputs": {
      "subgroups": {
        "workgroup": [
          128,
          1,
          1
        ],
        "dispatch": [
          1,
          1,
          1
        ],
        "mapping": "size/lane/subgroup/count",
        "requestedSize": null,
        "lanes": 512,
        "initial": 4294967295
      }
    },
    "controls": {
      "subgroups": [
        {
          "relationshipId": "E02.subgroups",
          "class": "required",
          "preconditions": [
            "advertised feature and successful dispatch; no assumed subgroup lane order"
          ]
        },
        {
          "relationshipId": "webgpu.subgroup-range",
          "class": "required",
          "preconditions": [
            "readable power-of-two bounds from the same adapter"
          ]
        },
        {
          "relationshipId": "webgpu.requested-subgroup-size",
          "class": "required",
          "preconditions": [
            "explicit subgroup size requested"
          ]
        }
      ]
    }
  },
  {
    "key": "webgpu.compute.subgroup-indices",
    "inputs": {
      "subgroup-indices": {
        "workgroup": [
          128,
          1,
          1
        ],
        "dispatch": [
          1,
          1,
          1
        ],
        "mapping": "size/lane/subgroup/count",
        "requestedSize": null,
        "lanes": 512,
        "initial": 4294967295
      }
    },
    "controls": {
      "subgroup-indices": [
        {
          "relationshipId": "E02.subgroup-indices",
          "class": "required",
          "preconditions": [
            "advertised feature and successful dispatch; no assumed subgroup lane order"
          ]
        },
        {
          "relationshipId": "webgpu.subgroup-range",
          "class": "required",
          "preconditions": [
            "readable power-of-two bounds from the same adapter"
          ]
        },
        {
          "relationshipId": "webgpu.requested-subgroup-size",
          "class": "required",
          "preconditions": [
            "explicit subgroup size requested"
          ]
        }
      ]
    }
  },
  {
    "key": "webgpu.compute.subgroup-size",
    "inputs": {
      "subgroup-size": {
        "workgroup": [
          128,
          1,
          1
        ],
        "dispatch": [
          1,
          1,
          1
        ],
        "mapping": "size/lane/subgroup/count",
        "requestedSize": "adapter.info.subgroupMinSize",
        "lanes": 512,
        "initial": 4294967295
      }
    },
    "controls": {
      "subgroup-size": [
        {
          "relationshipId": "E02.subgroup-size",
          "class": "required",
          "preconditions": [
            "advertised feature and successful dispatch; no assumed subgroup lane order"
          ]
        },
        {
          "relationshipId": "webgpu.subgroup-range",
          "class": "required",
          "preconditions": [
            "readable power-of-two bounds from the same adapter"
          ]
        },
        {
          "relationshipId": "webgpu.requested-subgroup-size",
          "class": "required",
          "preconditions": [
            "explicit subgroup size requested"
          ]
        }
      ]
    }
  },
  {
    "key": "webgpu.compute.immediate-readback",
    "inputs": {
      "immediate-readback": {
        "data": [
          3,
          5,
          7,
          11
        ],
        "rangeOffset": 0,
        "expected": [
          3,
          6,
          9,
          14
        ],
        "lanes": 4,
        "dispatch": [
          1,
          1,
          1
        ],
        "initial": 4294967295
      }
    },
    "controls": {
      "immediate-readback": [
        {
          "relationshipId": "E02.immediate-readback",
          "class": "required",
          "preconditions": [
            "advertised feature and successful dispatch; no assumed subgroup lane order"
          ]
        }
      ]
    }
  },
  {
    "key": "webgpu.compute.immediate-source-error",
    "inputs": {
      "immediate-source-error": {
        "data": [
          7
        ],
        "dataOffset": 2,
        "rangeOffset": 0,
        "size": 1
      }
    },
    "controls": {
      "immediate-source-error": [
        {
          "relationshipId": "E08.immediate-source-error",
          "class": "required",
          "preconditions": [
            "advertised feature and successful dispatch; no assumed subgroup lane order"
          ]
        }
      ]
    }
  },
  {
    "key": "webgpu.compute.immediate-destination-error",
    "inputs": {
      "immediate-destination-error": {
        "data": [
          7
        ],
        "dataOffset": 0,
        "rangeOffset": 2,
        "size": 1
      }
    },
    "controls": {
      "immediate-destination-error": [
        {
          "relationshipId": "E08.immediate-destination-error",
          "class": "required",
          "preconditions": [
            "advertised feature and successful dispatch; no assumed subgroup lane order"
          ]
        }
      ]
    }
  },
  {
    "key": "webgpu.compute.execution-failures",
    "inputs": {
      "execution-failures": {
        "messageLimit": 384,
        "phases": "allocation/compile/pipeline/encode/validation/map/device"
      }
    },
    "controls": {}
  }
]

One collector runs per invocation. Results and JSON select this signal’s fields; any companions execute in the same collector.

Generated source manifest lists runtime files, fixture URLs and content digests for this build. The Source tab provides a copyable console sample.

Run and edit locally

From the repository root, start the Astro app, then open /signals/webgpu.compute. Edit the collector source and reload the page to load its new build.

pnpm run dev:web

In a browser module served by this repository’s Vite graph:

import { createCollector } from "/core/collect"
import { measurementModule } from "/core/signals/webgpu/compute"

const signal = measurementModule
const collector = createCollector()
const suite = { signals: [signal] }
const result = await collector.collect(suite)

Reuse the collector owner for repeated calls so collection can enforce cleanup. This returns the collector’s raw result; app/signals/projection.ts selects the retained fields shown on this page.

rg -n 'measurementModule' core app tests
pnpm run check
pnpm run test tests/unit/app/focused-projection.test.ts