All of lore.kernel.org
 help / color / mirror / Atom feed
From: Cyril Hrubis <chrubis@suse.cz>
To: Li Wang <liwang@redhat.com>
Cc: ltp@lists.linux.it
Subject: Re: [LTP] [PATCH v2] sched_football: synchronize with kickoff flag to reduce skew
Date: Fri, 5 Sep 2025 15:45:03 +0200	[thread overview]
Message-ID: <aLrpX5Cd0ljf66Yo@yuki.lan> (raw)
In-Reply-To: <CAEemH2c_26s1ojGnStAxzGHVEhbVTpM0dL3PU=Od=G90gPvnGg@mail.gmail.com>

Hi!
> Thanks, I do manually test and now almost 1/20 times fail.
> And the worth mentioning that this is not a new failure in RHEL kernels.
> Those patches since the barrier have already much improved the test
> result from RHEL side. At least from RHEL RT-kernel I didn't observe
> fail any more.
> 
> So ,as long as the patch works on the SUSE kernel to resolve it's NEW
> problem,
> I think we can merge.

I got another idea meanwhile, what happens if we keep bussy loop for the
defense and add the sched_yield() only to offense and crazy fans? That
should ensure that before the kickoff the defense threads should be
hogging the available CPUs.

-- 
Cyril Hrubis
chrubis@suse.cz

-- 
Mailing list info: https://lists.linux.it/listinfo/ltp

  reply	other threads:[~2025-09-05 13:44 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-09-04 10:26 [LTP] [PATCH v2] sched_football: synchronize with kickoff flag to reduce skew Li Wang via ltp
2025-09-04 11:00 ` Petr Vorel
2025-09-04 11:42   ` Cyril Hrubis
2025-09-04 13:14     ` Li Wang via ltp
2025-09-04 15:28       ` Cyril Hrubis
2025-09-05  0:54         ` Li Wang via ltp
2025-09-05  4:03           ` Li Wang via ltp
2025-09-05  6:50             ` Li Wang via ltp
2025-09-05  7:03             ` Petr Vorel
2025-09-05  7:31               ` Petr Vorel
2025-09-05  7:36                 ` Li Wang via ltp
2025-09-05  9:18             ` Cyril Hrubis
2025-09-05 11:50               ` Li Wang via ltp
2025-09-05 12:32                 ` Cyril Hrubis
2025-09-05 12:46                   ` Petr Vorel
2025-09-06  0:58                     ` Li Wang via ltp
2025-09-05 12:49                   ` Li Wang via ltp
2025-09-05 13:45                     ` Cyril Hrubis [this message]
2025-09-05 14:48                       ` Li Wang via ltp
2025-09-04 18:26       ` Petr Vorel

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=aLrpX5Cd0ljf66Yo@yuki.lan \
    --to=chrubis@suse.cz \
    --cc=liwang@redhat.com \
    --cc=ltp@lists.linux.it \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.