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Re: [Qemu-devel] -kernel-kqemu

From: Brad Campbell
Subject: Re: [Qemu-devel] -kernel-kqemu
Date: Sat, 22 Apr 2006 01:09:49 +0400
User-agent: Thunderbird 3.0a1 (X11/20060414)

Troy Benjegerdes wrote:
On Thu, Feb 09, 2006 at 04:01:34PM -0600, Anthony Liguori wrote:
Jim C. Brown wrote:
-kernel-kqemu virtualizes ring 0 code.

So it basically makes qemu do what VMware does.

IIRC someone reported a 33% speedup with the new option.
That was me. That was a 33% speedup on win2k startup time. kqemu (user only) has a negligible impact on win2k startup time which suggests this is mostly ring 0 code running which would make it a good benchmark for kernel-kqemu performance.

This was a terribly unscientific benchmarking so don't read too much into it.


Anthony Liguori

My win2k guest (with SP4, but not any updates) seemed to hang on startup
with -kernel-kqemu.

Are you using -m 256 by any chance? I get this result with around that much ram allocated to the guest. -m 160 (or less) or -m 384 (or more) works perfectly here..

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