From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alexander Charbonnet Subject: x86-64 Net Performance [was: Opteron server and NUMA] Date: Sun, 9 Oct 2005 00:46:20 -0500 Message-ID: <200510090046.20993.alexander@charbonnet.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Content-Disposition: inline List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: xen-devel@lists.xensource.com Cc: Ian Pratt , Nicholas Lee List-Id: xen-devel@lists.xenproject.org > 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