3 ms·

If you have a per-cpu metric there would not be a reason to use atomic instructions to mutate it.

• loeg 11d ago
  In general your unpinned userspace threads will hit the same CPU 99.99% of the time, but not 100%.
  • jeffbee 11d ago
    Sure. You get the pointer, you lock the mutex, 99.99% of the time that is uncontended, then you set all the metrics and release it.
    • loeg 11d ago
      Taking the mutex uses (uncontended) atomic ops.