From: "Jan Beulich" <jbeulich@novell.com>
To: xen-devel@lists.xensource.com,
Dan Magenheimer <dan.magenheimer@oracle.com>
Subject: RE: [PATCH] x86: add SSE-based copy_page()
Date: Wed, 12 Nov 2008 15:01:06 +0000 [thread overview]
Message-ID: <491AFDC2.76E4.0078.0@novell.com> (raw)
In-Reply-To: <a17e7c30-e829-48e6-8b34-c33c6239b354@default>
>>> Dan Magenheimer <dan.magenheimer@oracle.com> 12.11.08 15:51 >>>
>I assume the 12% faster is on a benchmark...
It's the win for an application doing nothing but dirtying private mappings
of a file. That seemed like the least overhead test that wouldn't require any
special testing code in kernel or hypervisor.
>Have you measured how much faster the copy_page_sse2
>routine (standalond) is than the memcpy? Is it a
>factor of 2?
No, I didn't.
Jan
next prev parent reply other threads:[~2008-11-12 15:01 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-12 9:37 [PATCH] x86: add SSE-based copy_page() Jan Beulich
2008-11-12 14:51 ` Dan Magenheimer
2008-11-12 15:01 ` Jan Beulich [this message]
2008-11-12 17:17 ` Dan Magenheimer
2008-11-13 8:37 ` Jan Beulich
2008-11-13 23:41 ` Dan Magenheimer
2008-11-14 3:08 ` Cui, Dexuan
2008-11-14 14:10 ` Dan Magenheimer
2008-11-14 14:16 ` Keir Fraser
2008-11-19 20:24 ` Dan Magenheimer
2008-11-19 21:21 ` Keir Fraser
2008-11-20 8:46 ` Jan Beulich
2009-01-12 23:29 ` Dan Magenheimer
2009-01-13 8:13 ` Keir Fraser
2009-01-13 8:34 ` Jan Beulich
2009-01-13 8:27 ` Jan Beulich
-- strict thread matches above, loose matches on Subject: below --
2009-01-13 8:31 Jan Beulich
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