mirror of https://lore.kernel.org/lkml/
 help / color / mirror / Atom feed
From: Joseph Salisbury <joseph.salisbury@oracle.com>
To: peterz@infradead.org, mingo@kernel.org
Cc: juri.lelli@redhat.com, vincent.guittot@linaro.org,
	dietmar.eggemann@arm.com, Steven Rostedt <rostedt@goodmis.org>,
	bsegall@google.com, mgorman@suse.de, vschneid@redhat.com,
	linux-kernel@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [REGRESSION] sched/fair: Add lag based placement
Date: Wed, 13 Nov 2024 13:03:00 -0500	[thread overview]
Message-ID: <58289b1c-8a56-4607-8632-d36aef1fc5dd@oracle.com> (raw)

Hello,

During performance testing, we found a regression of ~9% performance 
with the TPCC benchmark.   This performance regression was introduced in 
v6.6-rc1.  After a bisect, the following commit was identified as the 
cause of the regression:

86bfbb7ce4f6 ("sched/fair: Add lag based placement")

I was hoping to get some feedback from the scheduler folks.  Do you 
think gathering any additional data will help diagnose this issue?  Are 
there any tunable options that can changed to see how performance is 
affected?


Thanks,

Joe








             reply	other threads:[~2024-11-13 18:03 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-11-13 18:03 Joseph Salisbury [this message]
2024-11-13 18:19 ` Phil Auld
2024-11-13 18:22   ` [External] : " Joseph Salisbury
2024-11-13 18:33     ` Joseph Salisbury
2024-11-14 19:50       ` [External] : " Joseph Salisbury

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=58289b1c-8a56-4607-8632-d36aef1fc5dd@oracle.com \
    --to=joseph.salisbury@oracle.com \
    --cc=bsegall@google.com \
    --cc=dietmar.eggemann@arm.com \
    --cc=juri.lelli@redhat.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mgorman@suse.de \
    --cc=mingo@kernel.org \
    --cc=peterz@infradead.org \
    --cc=rostedt@goodmis.org \
    --cc=vincent.guittot@linaro.org \
    --cc=vschneid@redhat.com \
    /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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®