Add EEVDF scheduler support #3
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- Add kernel version detection from system metadata - Implement scheduler detection (CFS vs EEVDF) based on kernel version 6.6+ - Update Stats class to handle optional vruntime data gracefully - Modify Engine to conditionally parse vruntime based on scheduler type - Add comprehensive tests for kernel version parsing and scheduler detection - Maintain backward compatibility with CFS scheduler on older kernels - Fix relative imports across modules Resolves issue with perf-trace-viewer failing on modern Linux kernels that use EEVDF (Earliest Eligible Virtual Deadline First) scheduler instead of CFS (Completely Fair Scheduler).
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Can you make this fix available? It is not under the main branch... I am running Linux 6.12 with PREEMPT_RT and am having the same issue with vruntime. Thanks! |
jimmizutani
approved these changes
Aug 22, 2025
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@EtienneBasilik done! Thanks for your patience. |
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Description
Resolves #2: modern Linux kernels use EEVDF (Earliest Eligible Virtual Deadline First) scheduler instead of CFS (Completely Fair Scheduler).
Although in theory the EEVDF scheduler could be backported, I've not seen anyone do this, so the switch here is a simple kernel version check: 6.6 or greater is taken to be EEVDF.
Type of Change
Checklist