[metascroy]

Stack

Off-graph KV cache for the native ggml engine, through serving Muse Glimmer on it. Review bottom-up; each PR builds and passes its tests on its own.

• [Native] Launch the Muse Glimmer server on the native backend #24957
• [Native] Serve Muse Glimmer on the native ggml engine #24956
• [Native] Publish the context length with off-graph packages #24955
• [Native] Share the off-graph cache geometry with other callers #24954
• Serve one batching session from a single-sequence cache #24953
• Report a single-sequence cache's length on SequenceControl #24952 (this PR)
• [Native] Export Muse Glimmer through the native backend #24951
• [Native] Replay sample sets without decoding their tokens #24950
• [Native] Map Muse Glimmer GGUF tensors onto its HF model #24949
• [Native] Run GGUF Q5_K weights in the ggml engine #24948
• [Native] Load the first layers of a GGUF with --layers #24947
• [Native] Run the HF LLM export on newer transformers #24946
• [Native] Fuse broadcast RoPE frequencies and lower tanh in ggml #24945
• [Native] Support sliding-window attention with the off-graph KV cache #24944
• [Native] Carry named metadata in native packages #24943
• [Native] Add chunked prefill and interactive chat to the LLM runner #24639
• [Native] Run off-graph KV cache packages in the LLM runner #24638
• [Native] Serve kvcache::update_and_attend in the ggml engine #24637
• [Native] Add load-time options to engine contexts #24636
• [Native] Export HF LLMs with an off-graph KV cache #24635
• Move off-graph HF attention to extension/llm/cache #24634

Summary

BatchControl answers pos() for each sequence, but SequenceControl offered no way to ask where its one sequence stands; only SequenceCache, which a control plane does not include, had length(). This adds length() to the face. Every implementation (SequenceCache, MLXSequenceCache) already had it, so this only marks those overrides.

Test plan

cache_test.cpp: the control face reports the length through commits, rewinds and clears. MLX and CUDA weren't built locally; the change there is the override keyword.

---

Authored with Claude Code.

[pytorch-bot]

🔗 Helpful Links

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❌ 170 New Failures, 6 Unrelated Failures, 23 Unclassified Failures

As of commit ba42f2b with merge base c7f7931 ():

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• pull / test-models-linux-basic (vit, xnnpack-quantization-delegation, cmake, mt-l-arm64g4-16-62, executo... / linux-job (gh)
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• pull / test-models-linux-basic (vit, xnnpack-quantization-delegation, cmake, mt-l-x86iavx512-8-64, execu... / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• pull / test-moshi-linux / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• pull / test-multimodal-linux (gemma3-4b) / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• pull / test-openvino-linux / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• pull / test-parakeet-xnnpack-linux / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• pull / test-phi-3-mini-runner-linux / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• pull / test-pybindings-no-aten / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• pull / test-qnn-buck-build-linux / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• pull / test-qnn-delegate-linux / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• pull / test-qnn-direct-build-linux / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• pull / test-qnn-models-linux (dl3) / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• pull / test-qnn-models-linux (mv2) / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• pull / test-qnn-models-linux (mv3) / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• pull / test-qnn-passes-linux / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• pull / test-qnn-python-imports-linux / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• pull / test-qnn-testsuite-linux / test-backend-linux (qnn, models) / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• pull / test-qnn-testsuite-linux / test-backend-linux (qnn, operators) / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• pull / test-qnn-wheel-packages-linux (3.11) / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• pull / test-qnn-wheel-packages-linux (3.12) / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• pull / test-qnn-wheel-packages-linux (3.13) / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• pull / test-quantized-aot-lib-linux / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• pull / test-selective-build-linux / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• pull / test-setup-linux-gcc / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• pull / test-sqnr-static-llm-qnn-linux (smollm2_135m) / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• pull / test-static-llama-qnn-linux (stories_110m) / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• pull / test-static-llama-qnn-linux (stories_260k_bc) / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• pull / test-voxtral-realtime-xnnpack-linux / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• pull / test-vulkan-models-linux / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• pull / test-vulkan-operators-linux / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• pull / unittest / linux / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• pull / unittest / macos / macos-job (gh)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
• pull / unittest-buck / linux / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• pull / unittest-buck / macos / macos-job (gh)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
• pull / unittest-editable / linux / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• pull / unittest-editable / macos / macos-job (gh)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
• pull / unittest-nxp-neutron / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• pull / unittest-wasm-bindings (--enable-etdump) / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• pull / unittest-wasm-bindings / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• Test ARM Backend / test-arm / test-backend-linux (arm_tosa_fp, models) / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• Test ARM Backend / test-arm / test-backend-linux (arm_tosa_fp, operators) / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• Test ARM Backend / test-arm-vgf / test-backend-linux (arm_vgf_fp, models) / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• Test ARM Backend / test-arm-vgf / test-backend-linux (arm_vgf_fp, operators) / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• Test CPU Backend / test-cpu / test-backend-linux (cpu_fp32, models) / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• Test CPU Backend / test-cpu / test-backend-linux (cpu_fp32, operators) / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• Test QNN Backend / test-qnn / test-backend-linux (qnn, models) / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• Test QNN Backend / test-qnn / test-backend-linux (qnn, operators) / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• Test Vulkan Backend / test-vulkan / test-backend-linux (vulkan, models) / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• Test Vulkan Backend / test-vulkan / test-backend-linux (vulkan, operators) / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• Test WebGPU Backend / test-webgpu / test-backend-linux (webgpu, models) / linux-job (gh)
  curl: (22) The requested URL returned error:
• Test WebGPU Backend / test-webgpu / test-backend-linux (webgpu, operators) / linux-job (gh)
  curl: (22) The requested URL returned error:
• Test XNNPACK Backend / test-xnnpack / test-backend-linux (xnnpack, models) / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• Test XNNPACK Backend / test-xnnpack / test-backend-linux (xnnpack, operators) / linux-job (gh)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1

UNCLASSIFIED FAILURES - DrCI could not classify the following jobs because the workflow did not run on the merge base. The failures may be pre-existing on trunk or introduced by this PR:

• Build Aarch64 Linux CUDA Wheels / pytorch/executorch / build-wheel-py3_11-cuda-aarch6413_2-aarch64 (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
• Build Aarch64 Linux CUDA Wheels / pytorch/executorch / upload / upload-wheel-py3_11-cuda-aarch6413_2-aarch64 (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
  Unable to download artifact(s): Artifact not found
• Build Aarch64 Linux Wheels / pytorch/executorch / build-wheel-py3_11-cpu-aarch64 (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
• Build Aarch64 Linux Wheels / pytorch/executorch / upload / upload-wheel-py3_11-cpu-aarch64 (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
  Unable to download artifact(s): Artifact not found
• Build Linux CUDA Wheels / pytorch/executorch / build-manywheel-py3_11-cuda13_2 (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
• Build Linux CUDA Wheels / pytorch/executorch / upload / upload-manywheel-py3_11-cuda13_2 (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
  Unable to download artifact(s): Artifact not found
• Build Linux Wheels / pytorch/executorch / build-manywheel-py3_11-cpu (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
• Build Linux Wheels / pytorch/executorch / upload / upload-manywheel-py3_11-cpu (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
  Unable to download artifact(s): Artifact not found
• Build macOS Wheels / pytorch/executorch / build-wheel-py3_11-cpu (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
• Build macOS Wheels / pytorch/executorch / upload / upload-wheel-py3_11-cpu (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
  Unable to download artifact(s): Artifact not found
• Build Windows CUDA Wheels / bundle-cuda-windows-wheel-e2e-13.2 (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
  Unable to download artifact(s): Artifact not found
• Build Windows CUDA Wheels / export-cuda-windows-wheel-program-13.2 / linux-job (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• Build Windows CUDA Wheels / pytorch/executorch / build-wheel-py3_11-cuda13_2 (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
• Build Windows CUDA Wheels / pytorch/executorch / upload / upload-wheel-py3_11-cuda13_2 (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
  Unable to download artifact(s): Artifact not found
• Build Windows CUDA Wheels / test-cuda-windows-wheel-e2e-13.2 / windows-job (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
  Unable to download artifact(s): Artifact not found
• Build Windows Wheels / pytorch/executorch / build-wheel-py3_11-cpu (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
• Build Windows Wheels / pytorch/executorch / upload / upload-wheel-py3_11-cpu (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
  Unable to download artifact(s): Artifact not found
• periodic / test-models-linux (buck2, mv3, portable, mt-l-x86iavx512-8-64, 90) / linux-job (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• periodic / test-models-linux (buck2, mv3, xnnpack-quantization-delegation, mt-l-x86iavx512-8-64, 90) / linux-job (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• periodic / test-models-linux (cmake, mv3, portable, mt-l-x86iavx512-8-64, 90) / linux-job (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• periodic / test-models-linux (cmake, mv3, xnnpack-quantization-delegation, mt-l-x86iavx512-8-64, 90) / linux-job (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• periodic / test-models-linux (cmake, vit, portable, mt-l-x86iavx512-8-64, 90) / linux-job (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1
• periodic / test-models-linux (cmake, vit, xnnpack-quantization-delegation, mt-l-x86iavx512-8-64, 90) / linux-job (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1

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

• Cadence Build & Test / hifi-build / hifi4 (gh) (detected as infra flaky with no log or failing log classifier)
• Cadence Build & Test / hifi1s-build / hifi1s (gh) (detected as infra flaky with no log or failing log classifier)
• Cadence Build & Test / hifi5s-build / hifi5s (gh) (detected as infra flaky with no log or failing log classifier)
• Cadence Build & Test / vision-build / vision (gh) (detected as infra flaky with no log or failing log classifier)
• pull / unittest / windows / windows-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)

This comment was automatically generated by Dr. CI and updates every 15 minutes.

[metascroy]

Superseded: the native executor now serves sessions from a real multi-sequence ggml cache (#25007) instead of adapting the single-sequence cache, so this is no longer needed.