From: Andi Kleen <andi@firstfloor.org>
To: ling.ma@intel.com
Cc: mingo@elte.hu, hpa@zytor.com, tglx@linutronix.de,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH RFC] [x86] Optimize copy-page by reducing impact from HW prefetch
Date: Wed, 22 Jun 2011 13:05:41 -0700 [thread overview]
Message-ID: <m2fwn13a3u.fsf@firstfloor.org> (raw)
In-Reply-To: <1308351117-32452-1-git-send-email-ling.ma@intel.com> (ling ma's message of "Sat, 18 Jun 2011 06:51:57 +0800")
ling.ma@intel.com writes:
> impact(DCU prefetcher), and simplify original code.
> The performance is improved about 15% on core2, 36% on snb respectively.
> (We use our micro-benchmark, and will do further test according to your requirment)
This doesn't make a lot of sense because neither Core-2 nor SNB use the
code path you patched. They all use the rep ; movs path
-Andi
--
ak@linux.intel.com -- Speaking for myself only
next prev parent reply other threads:[~2011-06-22 20:07 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-17 22:51 [PATCH RFC] [x86] Optimize copy-page by reducing impact from HW prefetch ling.ma
2011-06-22 20:05 ` Andi Kleen [this message]
2011-06-23 1:01 ` Ma, Ling
2011-06-23 2:29 ` Andi Kleen
2011-06-23 7:04 ` Ingo Molnar
2011-06-24 2:01 ` Ma, Ling
2011-06-24 2:09 ` Ma, Ling
2011-06-28 15:23 ` Ma, Ling
2011-07-01 8:10 ` Ma, Ling
2011-07-01 10:26 ` Ma, Ling
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=m2fwn13a3u.fsf@firstfloor.org \
--to=andi@firstfloor.org \
--cc=hpa@zytor.com \
--cc=ling.ma@intel.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@elte.hu \
--cc=tglx@linutronix.de \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.