On Tue, Feb 27, 2024 at 11:03 PM <mikhail.v.gavrilov@xxxxxxxxx> wrote: > > On Tue, 2024-02-27 at 18:23 +0100, Thomas Gleixner wrote: > > If we want to understand why CPU0 is problematic, then you need to > > use tracing to capture what's going on on CPU0 vs. other CPUs. > > I am not hear what kind of profiler software you prefer. > I famous with sysprof and attach here captures for both cases CPU0 vs > CPU23. I hope this helps clear things up. > Sorry for the noise. Because I am unsure whether you received or not my previous message with captures. I upload them to the mega file exchange server and share links below. capture CPU0: https://mega.nz/file/Ik5XiZAS#Hra7Xtzplp8xcHYFj4JXnpp8T-0UA0nhNSIJJLEcSBk capture CPU23: https://mega.nz/file/swg0CQ4C#PvGv_WXmtnATD7tNun5xz-lfA5GGqA-KOv1ZbVRJ_lI -- Best Regards, Mike Gavrilov.