From: Xan Charbonnet <xan@charbonnet.com>
To: xen-devel@lists.xensource.com
Cc: Ian Pratt <m+Ian.Pratt@cl.cam.ac.uk>,
Nicholas Lee <emptysands@gmail.com>
Subject: Re: x86-64 Net Performance
Date: Sun, 9 Oct 2005 02:33:18 -0500 [thread overview]
Message-ID: <200510090233.19644.xan@charbonnet.com> (raw)
In-Reply-To: <200510090046.20993.alexander@charbonnet.com>
Update: I went ahead and compiled glibc without TLS / NPTL. Also, I realized
that I wasn't allocating all my physical memory to Domain0 for these tests,
so I was giving Xen a disadvantage. It didn't change much, but those tests
have been re-done.
Here's the odd thing: disabling TLS for 64-bit improved native performance by
around 10%, but had no effect on Xen.
Native Domain0 Penalty
64-bit TLS 50.2 65.0 29.5%
64-bit no TLS 44.8 65.0 45.1%
32-bit TLS 59.6 59.5 -0.2%
32-bit no TLS 59.6 60.2 1.0%
Alex
next prev parent reply other threads:[~2005-10-09 7:33 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-10-08 17:51 Opteron server and NUMA Ian Pratt
2005-10-09 5:46 ` x86-64 Net Performance [was: Opteron server and NUMA] Alexander Charbonnet
2005-10-09 7:33 ` Xan Charbonnet [this message]
2005-10-09 10:07 ` Nicholas Lee
-- strict thread matches above, loose matches on Subject: below --
2005-10-09 9:18 x86-64 Net Performance Ian Pratt
2005-10-09 15:16 ` Andrew Theurer
2005-10-10 1:52 ` Alexander Charbonnet
2005-10-09 19:47 ` Alexander Charbonnet
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