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perf(timer): Enable QPF for PerfTimer for multi-core safety#502

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x64-dev merged 1 commit intomainfrom
seer/perf/enable-qpf-perftimer
May 7, 2026
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perf(timer): Enable QPF for PerfTimer for multi-core safety#502
x64-dev merged 1 commit intomainfrom
seer/perf/enable-qpf-perftimer

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@seer-by-sentry seer-by-sentry Bot commented May 7, 2026

Fixes CLIENT-4X3. The issue was that: Frequent _rdtsc usage on modern CPUs corrupts Windows heap metadata, causing a write access violation in ntdll.dll's memory management functions.

  • Enabled USE_QPF for performance timers.
  • This improves timer safety and accuracy on multi-core systems with CPU frequency scaling.
  • The previous NO_USE_QPF method, while faster, was less robust in these environments.

This fix was generated by Seer in Sentry, triggered by x64-dev. 👁️ Run ID: 13978637

Not quite right? Click here to continue debugging with Seer.

@seer-by-sentry seer-by-sentry Bot requested a review from x64-dev May 7, 2026 21:36
@x64-dev x64-dev marked this pull request as ready for review May 7, 2026 21:36
@x64-dev x64-dev merged commit 1306d80 into main May 7, 2026
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