From: Andi Kleen <ak@linux.intel.com>
To: "Kirill A. Shutemov" <kirill@shutemov.name>
Cc: Cannon Matthews <cannonmatthews@google.com>,
Mike Kravetz <mike.kravetz@oracle.com>,
Andrew Morton <akpm@linux-foundation.org>,
Matthew Wilcox <willy@infradead.org>,
Michal Hocko <mhocko@kernel.org>,
David Rientjes <rientjes@google.com>,
Greg Thelen <gthelen@google.com>, Salman Qazi <sqazi@google.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org, x86@kernel.org
Subject: Re: [PATCH] mm: clear 1G pages with streaming stores on x86
Date: Mon, 9 Mar 2020 08:33:25 -0700 [thread overview]
Message-ID: <20200309153325.GJ1454533@tassilo.jf.intel.com> (raw)
In-Reply-To: <20200309000820.f37opzmppm67g6et@box>
> > Tested:
> > Time to `mlock()` a 512GiB region on broadwell CPU
> > AVG time (s) % imp. ms/page
> > clear_page_erms 133.584 - 261
> > clear_page_nt 34.154 74.43% 67
>
> Some macrobenchmark would be great too.
Yes especially something that actually uses the memory. I suspect you'll need
something like the below
> That patchset is somewhat more complex trying to keep the memory around
> the fault address hot in cache. In theory it should help to reduce latency
> on the first access to the memory.
-Andi
prev parent reply other threads:[~2020-03-09 15:33 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-07 1:03 [PATCH] mm: clear 1G pages with streaming stores on x86 Cannon Matthews
2020-03-07 15:36 ` kbuild test robot
2020-03-07 22:06 ` Andrew Morton
2020-03-09 0:08 ` Kirill A. Shutemov
2020-03-09 9:06 ` Michal Hocko
2020-03-09 9:35 ` Kirill A. Shutemov
2020-03-09 11:36 ` Kirill A. Shutemov
2020-03-09 12:26 ` Michal Hocko
2020-03-09 18:01 ` Mike Kravetz
2020-03-09 15:38 ` Andi Kleen
2020-03-09 18:37 ` Matthew Wilcox
2020-03-11 0:21 ` Cannon Matthews
2020-03-11 0:54 ` Kirill A. Shutemov
2020-03-11 3:35 ` Arvind Sankar
2020-03-11 8:16 ` Kirill A. Shutemov
2020-03-11 18:32 ` Arvind Sankar
2020-03-11 20:32 ` Arvind Sankar
2020-03-12 0:52 ` Kirill A. Shutemov
2020-03-31 0:40 ` Elliott, Robert (Servers)
2020-03-16 10:18 ` Michal Hocko
2020-03-16 12:19 ` Kirill A. Shutemov
2020-03-26 19:46 ` Matthew Wilcox
2020-03-11 15:07 ` David Laight
2020-03-09 15:33 ` Andi Kleen [this message]
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=20200309153325.GJ1454533@tassilo.jf.intel.com \
--to=ak@linux.intel.com \
--cc=akpm@linux-foundation.org \
--cc=cannonmatthews@google.com \
--cc=gthelen@google.com \
--cc=kirill@shutemov.name \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=mhocko@kernel.org \
--cc=mike.kravetz@oracle.com \
--cc=rientjes@google.com \
--cc=sqazi@google.com \
--cc=willy@infradead.org \
--cc=x86@kernel.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;
as well as URLs for NNTP newsgroup(s).