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RE: [Xen-devel] Serious performance issues

To: "Tommi Virtanen" <tv@xxxxxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxxxx>
Subject: RE: [Xen-devel] Serious performance issues
From: "Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>
Date: Fri, 4 Mar 2005 17:44:43 -0000
Cc: <ian.pratt@xxxxxxxxxxxx>
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Thread-topic: [Xen-devel] Serious performance issues
> Hi. I have a Shuttle box with an AMD Athlon XP 2200+ and 1GB of RAM.
> I'm normally running it with Debian sarge/sid and kernel 2.6.10-1-k7,
> as built by Debian. I want to use Xen on it. I built a xen0 kernel
> which is as close to the Debian kernel as I can (no power management,
> no HPET timers, broken ISA drivers disabled), disabled /lib/tls, and
> booted with the new kernel.

> lat_syscall
> -Simple syscall: 0.6188 microseconds
> +Simple syscall: 0.1547 microseconds

System call latency should be identical between Xen and native. The fact
that it is not inidcates that your system is seriously screwed running

Have you got some interrupt line going crazy?

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