From: William Kucharski <william.kucharski@oracle.com>
To: "alexlzhu@fb.com" <alexlzhu@fb.com>
Cc: "linux-mm@kvack.org" <linux-mm@kvack.org>,
"kernel-team@fb.com" <kernel-team@fb.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"akpm@linux-foundation.org" <akpm@linux-foundation.org>
Subject: Re: [PATCH v3] mm: add thp_utilization metrics to /proc/thp_utilization
Date: Fri, 5 Aug 2022 20:28:19 +0000 [thread overview]
Message-ID: <70BEF411-33A1-4733-AE09-BE8486D2F8E8@oracle.com> (raw)
> On Aug 5, 2022, at 12:40, alexlzhu@fb.com wrote:
>
> From: Alexander Zhu <alexlzhu@fb.com>
>
> This change introduces a tool that scans through all of physical
> memory for anonymous THPs and groups them into buckets based
> on utilization.
Out of curiosity, do you have any statistics on how much of a performance impact scanning may have?
We've reached the point where we've finally been able to show previous admonitions to not enable THP due to a negative performance impact no longer hold true, and I'd hate to see systems on which enabling THP now would cause a performance hit due to this scanner.
next reply other threads:[~2022-08-05 20:28 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-05 20:28 William Kucharski [this message]
-- strict thread matches above, loose matches on Subject: below --
2022-08-05 21:14 William Kucharski
2022-08-05 21:46 ` Alex Zhu (Kernel)
2022-08-05 18:40 alexlzhu
2022-08-05 18:50 ` Matthew Wilcox
2022-08-05 19:04 ` Rik van Riel
2022-08-05 19:24 ` Matthew Wilcox
2022-08-05 19:51 ` Alex Zhu (Kernel)
2022-08-08 17:55 ` Yang Shi
2022-08-08 18:35 ` Rik van Riel
2022-08-09 17:11 ` Yang Shi
2022-08-09 17:15 ` Alex Zhu (Kernel)
2022-08-09 23:35 ` Yu Zhao
2022-08-10 17:07 ` Yang Shi
2022-08-10 17:14 ` Alex Zhu (Kernel)
2022-08-10 17:54 ` Yu Zhao
2022-08-10 21:39 ` Alex Zhu (Kernel)
2022-08-10 21:56 ` Yu Zhao
2022-08-11 0:00 ` Alex Zhu (Kernel)
2022-08-11 1:15 ` Yu Zhao
2022-08-11 2:08 ` Alex Zhu (Kernel)
2022-08-11 19:20 ` Alex Zhu (Kernel)
2022-08-11 21:55 ` Yu Zhao
2022-08-11 22:12 ` Yang Shi
2022-08-11 22:59 ` Yu Zhao
2022-08-07 6:03 ` kernel test robot
2022-08-07 6:44 ` kernel test robot
2022-08-07 6:55 ` kernel test robot
2022-08-08 17:52 ` Yang Shi
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=70BEF411-33A1-4733-AE09-BE8486D2F8E8@oracle.com \
--to=william.kucharski@oracle.com \
--cc=akpm@linux-foundation.org \
--cc=alexlzhu@fb.com \
--cc=kernel-team@fb.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
/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