[ExecuTorch][WebGPU] Port pow.Tensor_Scalar by JCNTH · Pull Request #21162 · pytorch/executorch

JCNTH · 2026-07-22T22:30:10Z

Stack from ghstack (oldest at bottom):

Ports pow.Tensor_Scalar (tensor ^ scalar-exponent) on the shared unary helper: the exponent rides the min uniform slot, exactly like leaky_relu's slope. output[idx] = pow(input[idx], exponent).

Key changes:

runtime/ops/unary/pow_scalar.wgsl (+ generated _wgsl.h) — pow(input[idx], params.minimum).
runtime/ops/unary/Activations.cpp — pow_scalar_impl (args [in, exponent, out]; exponent read via the shared get_val_or_inf into the min slot), registered aten.pow.Tensor_Scalar. Inherits the shared helper's fp32 int-guard + resize hook (the exponent is re-applied on resize).

Note: WGSL pow returns NaN for a negative base at any exponent (matching the reference GPU pow); the suite uses a positive base.
@exported-using-ghexport

Differential Revision: D112257604

[ghstack-poisoned]

pytorch-bot · 2026-07-22T22:30:14Z

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❌ 7 New Failures, 88 Pending, 40 Unrelated Failures

As of commit 94f15e5 with merge base 4a26c64 ():

NEW FAILURES - The following jobs have failed:

Build Presets / linux (linux, linux.arm64.2xlarge, executorch-ubuntu-22.04-gcc11-aarch64) / build (gh)
Build Presets / linux (llm, linux.arm64.2xlarge, executorch-ubuntu-22.04-gcc11-aarch64) / build (gh)
An error occurred trying to start process '/usr/bin/bash' with working directory '/home/ec2-user/actions-runner/_work/executorch/executorch/pytorch/executorch'. No such file or directory
Build Presets / linux (pybind, linux.arm64.2xlarge, executorch-ubuntu-22.04-gcc11-aarch64) / build (gh)
Build Presets / windows (pybind) / build (gh)
Build Presets / windows (windows) / build (gh)
pull / test-lora-linux / linux-job (gh)
An error occurred trying to start process '/usr/bin/bash' with working directory '/home/ec2-user/actions-runner/_work/executorch/executorch/pytorch/executorch'. No such file or directory
Test QNN Windows MSVC build / build-qnn-windows-msvc / windows-job (gh)

FLAKY - The following jobs failed but were likely due to flakiness present on trunk:

pull / test-arm-backend-public-api-backward-compatibility / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
pull / test-eval_llama-wikitext-linux / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
pull / test-llama_runner_eager-linux / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
pull / test-llama-runner-linux (fp32, xnnpack+custom+qe, linux.arm64.2xlarge, executorch-ubuntu-22.04-gc... / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
pull / test-llama-runner-linux (fp32, xnnpack+custom+quantize_kv, linux.arm64.2xlarge, executorch-ubuntu... / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
pull / test-llama-runner-linux (fp32, xnnpack+quantize_kv, linux.arm64.2xlarge, executorch-ubuntu-22.04-... / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
pull / test-lora-multimethod-linux / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
pull / test-mcu-cortex-m-backend / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
pull / test-mediatek-models-linux / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
pull / test-models-linux (emformer_join, portable, linux.4xlarge.memory) / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
pull / test-models-linux (emformer_join, xnnpack-quantization-delegation, linux.4xlarge.memory) / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
pull / test-models-linux (ic4, xnnpack-quantization-delegation, linux.4xlarge.memory) / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
pull / test-models-linux (llama3_2_vision_encoder, portable, linux.4xlarge.memory) / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
pull / test-models-linux (phi_4_mini, portable, linux.4xlarge.memory) / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
pull / test-models-linux (w2l, portable, linux.4xlarge.memory) / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
pull / test-models-linux-basic (mv3, portable, cmake, linux.arm64.2xlarge, executorch-ubuntu-22.04-gcc11... / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
pull / test-models-linux-basic (mv3, xnnpack-quantization-delegation, cmake, linux.arm64.2xlarge, execut... / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
pull / test-models-linux-basic (vit, portable, cmake, linux.arm64.2xlarge, executorch-ubuntu-22.04-gcc11... / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
pull / test-models-linux-basic (vit, xnnpack-quantization-delegation, cmake, linux.arm64.2xlarge, execut... / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
pull / test-multimodal-linux (gemma3-4b) / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
pull / test-parakeet-xnnpack-linux / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
pull / test-phi-3-mini-runner-linux / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
pull / test-voxtral-realtime-xnnpack-linux / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
pull / unittest / linux / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
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pull / unittest-editable / linux / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
pull / unittest-editable / windows / windows-job (gh) (detected as infra flaky with no log or failing log classifier)
Test ARM Backend / test-arm / test-backend-linux (arm_tosa_fp, models) / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
Test ARM Backend / test-arm / test-backend-linux (arm_tosa_fp, operators) / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
Test ARM Backend / test-arm / test-backend-linux (arm_vgf_fp, models) / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
Test ARM Backend / test-arm / test-backend-linux (arm_vgf_fp, operators) / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
Test QNN Backend / test-qnn / test-backend-linux (qnn, models) / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
Test QNN Backend / test-qnn / test-backend-linux (qnn, operators) / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
Test Vulkan Backend / test-vulkan / test-backend-linux (vulkan, models) / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
Test Vulkan Backend / test-vulkan / test-backend-linux (vulkan, operators) / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
Test WebGPU Backend / test-webgpu / test-backend-linux (webgpu, models) / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
Test WebGPU Backend / test-webgpu / test-backend-linux (webgpu, operators) / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
Test XNNPACK Backend / test-xnnpack / test-backend-linux (xnnpack, models) / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
Test XNNPACK Backend / test-xnnpack / test-backend-linux (xnnpack, operators) / linux-job (gh) (detected as infra flaky with no log or failing log classifier)

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github-actions · 2026-07-22T22:30:56Z

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psiddh

Approving full WebGPU stack

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[ExecuTorch][WebGPU] Port pow.Tensor_Scalar#21162

[ExecuTorch][WebGPU] Port pow.Tensor_Scalar#21162
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❌ 7 New Failures, 88 Pending, 40 Unrelated Failures

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