From: Max Kellermann <max.kellermann@ionos.com>
To: Oliver Sang <oliver.sang@intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
oe-lkp@lists.linux.dev, lkp@intel.com,
Linux Memory Management List <linux-mm@kvack.org>,
linux-kernel@vger.kernel.org, ying.huang@intel.com,
feng.tang@intel.com, fengwei.yin@intel.com
Subject: Re: [linux-next:master] [drivers/char/mem] 1b057bd800: stress-ng.splice.ops_per_sec -99.8% regression
Date: Wed, 18 Oct 2023 12:01:45 +0200 [thread overview]
Message-ID: <CAKPOu+8r1QpFUCyMMS04GOi-+HqM7-dxR4JcoLXfvXARobbZDA@mail.gmail.com> (raw)
In-Reply-To: <ZS+EKPJA+BMhM0yO@xsang-OptiPlex-9020>
On Wed, Oct 18, 2023 at 9:07 AM Oliver Sang <oliver.sang@intel.com> wrote:
> it found a (very big) regression comparing to parent commit.
>
> 19e3e6cdfdc73400 1b057bd800c3ea0c926191d7950
> ---------------- ---------------------------
> %stddev %change %stddev
> \ | \
> 12433266 -99.8% 22893 ą 3% stress-ng.splice.ops_per_sec
Oliver, how is it possible that we have three times the throughput
(MB_per_sec) at 1/500ths the ops?
next prev parent reply other threads:[~2023-10-18 10:02 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-17 15:06 kernel test robot
2023-10-17 16:56 ` Greg Kroah-Hartman
2023-10-18 6:31 ` Max Kellermann
2023-10-18 7:07 ` Oliver Sang
2023-10-18 7:57 ` Greg Kroah-Hartman
2023-10-18 8:12 ` Max Kellermann
2023-10-18 10:01 ` Max Kellermann [this message]
[not found] ` <CAKPOu+_T8xk4yd2P4KT4j3eMoFqwYmkxqDHaFtv4Hii5-XyPuA@mail.gmail.com>
2023-10-18 11:12 ` Max Kellermann
2023-10-19 5:41 ` Oliver Sang
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=CAKPOu+8r1QpFUCyMMS04GOi-+HqM7-dxR4JcoLXfvXARobbZDA@mail.gmail.com \
--to=max.kellermann@ionos.com \
--cc=feng.tang@intel.com \
--cc=fengwei.yin@intel.com \
--cc=gregkh@linuxfoundation.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=lkp@intel.com \
--cc=oe-lkp@lists.linux.dev \
--cc=oliver.sang@intel.com \
--cc=ying.huang@intel.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