From: "Martin K. Petersen" <martin.petersen@oracle.com>
To: Tomas Henzl <thenzl@redhat.com>
Cc: linux-scsi@vger.kernel.org, chandrakanth.patil@broadcom.com,
sathya.prakash@broadcom.com, jjurca@redhat.com,
sumit.saxena@broadcom.com, ranjan.kumar@broadcom.com
Subject: Re: [PATCH] mpi3mr: a perfomance fix
Date: Mon, 12 Aug 2024 22:00:40 -0400 [thread overview]
Message-ID: <yq1ikw5w5ao.fsf@ca-mkp.ca.oracle.com> (raw)
In-Reply-To: <20240803150433.17733-1-thenzl@redhat.com> (Tomas Henzl's message of "Sat, 3 Aug 2024 17:04:33 +0200")
> Patch 0c52310f2600 ("hrtimer: Ignore slack time for RT tasks in
> schedule_hrtimeout_range()") effectivelly shortens a sleep in a
> polling function in the driver. That is causing a perfomance
> regression as the new value of just 2us is too low. In certain test
> the perf drop is ~30%. Fix this by adjusting the sleep to 20us (close
> to the previous value).
Broadcom: Please review, thanks!
--
Martin K. Petersen Oracle Linux Engineering
next prev parent reply other threads:[~2024-08-13 2:01 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-08-03 15:04 [PATCH] mpi3mr: a perfomance fix Tomas Henzl
2024-08-13 2:00 ` Martin K. Petersen [this message]
2024-08-23 1:12 ` Martin K. Petersen
2024-08-25 8:31 ` Sumit Saxena
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=yq1ikw5w5ao.fsf@ca-mkp.ca.oracle.com \
--to=martin.petersen@oracle.com \
--cc=chandrakanth.patil@broadcom.com \
--cc=jjurca@redhat.com \
--cc=linux-scsi@vger.kernel.org \
--cc=ranjan.kumar@broadcom.com \
--cc=sathya.prakash@broadcom.com \
--cc=sumit.saxena@broadcom.com \
--cc=thenzl@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