[NPUW] Add timestamps to LLM execution profiling#34919
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dylanneve1 wants to merge 3 commits intoopenvinotoolkit:masterfrom
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[NPUW] Add timestamps to LLM execution profiling#34919dylanneve1 wants to merge 3 commits intoopenvinotoolkit:masterfrom
dylanneve1 wants to merge 3 commits intoopenvinotoolkit:masterfrom
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Expands on 04293e6 by adding HH:MM:SS.microsecond timestamps to LLM execution profiling points only (prefill/generate phases), for correlation with external voltage measurements on NPU. Gated behind OPENVINO_NPUW_PROF=1 and OPENVINO_NPUW_LOG_LEVEL=INFO.
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Pull request overview
Adds wall-clock timestamps to NPUW LLM execution profiling events to help correlate prefill/generate phases with external measurements (e.g., voltage traces), while reusing the existing profiling infrastructure.
Changes:
- Extend
ov::npuw::perf::metricto optionally emit START/END timestamped INFO logs aroundrecord(). - Add
emit_timestampsplumbing toov::npuw::perf::Profileand enable it forLLMInferRequestprofiling.
Reviewed changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated 4 comments.
| File | Description |
|---|---|
src/plugins/intel_npu/src/plugin/npuw/perf.hpp |
Adds timestamp emission support inside metric::record() and propagates timestamp enabling through Profile. |
src/plugins/intel_npu/src/plugin/npuw/llm_infer_request.cpp |
Enables timestamp emission for LLM execution profiling when profiling is enabled. |
- Fix move ctor to preserve vmin/vmax/total statistics - Use localtime_s/_r instead of localtime for thread safety - Gate timestamp computation on log level >= INFO to avoid unnecessary overhead when timestamps won't be visible
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