From: Alexander Charbonnet <alexander@charbonnet.com>
To: xen-devel@lists.xensource.com
Cc: Ian Pratt <m+Ian.Pratt@cl.cam.ac.uk>,
Nicholas Lee <emptysands@gmail.com>
Subject: x86-64 Net Performance [was: Opteron server and NUMA]
Date: Sun, 9 Oct 2005 00:46:20 -0500 [thread overview]
Message-ID: <200510090046.20993.alexander@charbonnet.com> (raw)
In-Reply-To: <A95E2296287EAD4EB592B5DEEFCE0E9D32E259@liverpoolst.ad.cl.cam.ac.uk>
> Can you try running that test on the same machine running a 32bit
> version of Xen. It's possible something weird is happening just on 64
> bit.
file.zip is approximately 100MB. Ran `ab -n 300 -c 1 localhost/file.zip`.
Disk I/O should not be a factor; I had Apache slurp the file into RAM before
each test. Table shows time in seconds and the percent penalty for Xen.
Native Domain0 Penalty
64-bit TLS 50.2 65.0 29.5%
32-bit TLS 59.6 64.8 8.7%
32-bit no TLS 59.6 62.6 5.0%
On 32-bit, disabling TLS is as easy as moving /lib/tls. For 64-bit, it's
compiled into Debian's glibc package. I can recompile and run that test if
you think it's worth doing.
Alex
next prev parent reply other threads:[~2005-10-09 5:46 UTC|newest]
Thread overview: 5+ 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 ` Alexander Charbonnet [this message]
2005-10-09 7:33 ` x86-64 Net Performance Xan Charbonnet
2005-10-09 10:07 ` x86-64 Net Performance [was: Opteron server and NUMA] Nicholas Lee
-- strict thread matches above, loose matches on Subject: below --
2005-10-09 11:05 Ian Pratt
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