Bug#407757: xen kernel makes dom0 slower
severity 407757 normal
tags 407757 moreinfo
thanks
On Sun, Jan 21, 2007 at 01:32:18AM +0100, Heiko Schulz wrote:
> Booting the xen linux image, the cpu performance is much slower
> than with a vanilla kernel (also 2.6.18). A simple shell script
> (which compute some numbers, no I/O) needs 60 percent more cpu time
> if I am using the xen kernel. No virtual machines are running.
Each running linux within xen is a virtual machine. CPU time loss is
expected but less than this.
> The machine is an IBM X3550 with Dual Core Xeon 5050.
32 or 64bit kernel?
> The kernel options are noapic and acpi=off. I hope, somebody have
> ideas...
So you forcefully disable things which are needed on modern machines.
Bastian
--
Bones: "The man's DEAD, Jim!"
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