From: Jens Axboe <qemu@kernel.dk>
To: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] Xenoppix (KNOPPIX5.1.1 + Xen3.0.4 + QEMU/KVM + HTTP-FUSE) is released
Date: Fri, 9 Feb 2007 18:32:04 +0100 [thread overview]
Message-ID: <20070209173204.GC3873@kernel.dk> (raw)
In-Reply-To: <45CC8195.1030404@bellard.org>
On Fri, Feb 09 2007, Fabrice Bellard wrote:
> Kuniyasu Suzaki wrote:
> > [...]
> > >>2) For best performances with kqemu, it is better to use Linux 2.4 as
> > >>guest OS (I know this is far from acceptable, but it can help some
> > >>people to get better performance !).
> >
> >Please tell me the reason why Linux 2.4 shows better performance, if
> >you have time. Does the difference of clock tick cause the problem?
>
> The Linux 2.6 kernel has more code running with the interrupts disabled
> than the 2.4 one. kqemu interprets the x86 code when the interrupts are
> disabled, so it is very slow in this case.
>
> A potential solution I am investigating is to use the new
> paravirtualization API of the kernel versions >= 2.6.20.
That'd be a great idea!
--
Jens Axboe
next prev parent reply other threads:[~2007-02-09 17:31 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-02-09 10:49 [Qemu-devel] Xenoppix (KNOPPIX5.1.1 + Xen3.0.4 + QEMU/KVM + HTTP-FUSE) is released Kuniyasu Suzaki
2007-02-09 10:43 ` Fabrice Bellard
2007-02-09 11:21 ` Kuniyasu Suzaki
2007-02-09 14:13 ` Fabrice Bellard
2007-02-09 17:32 ` Jens Axboe [this message]
2007-02-09 10:59 ` Ricardo Almeida
2007-02-09 11:27 ` Kuniyasu Suzaki
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