From: Matt Mackall <mpm@selenic.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: Rusty Russell <rusty@rustcorp.com.au>,
akpm@linux-foundation.org, Linux-kernel@vger.kernel.org
Subject: Re: Interesting interaction between lguest and CFS
Date: Mon, 4 Jun 2007 14:27:55 -0500 [thread overview]
Message-ID: <20070604192755.GI11115@waste.org> (raw)
In-Reply-To: <20070604191229.GA12444@elte.hu>
On Mon, Jun 04, 2007 at 09:12:29PM +0200, Ingo Molnar wrote:
>
> * Matt Mackall <mpm@selenic.com> wrote:
>
> > > btw., does this only happen with lguest, or with other idle shells
> > > too?
> >
> > Only noticed with lguest.
>
> ah, so both the shell and the 'competing' CPU hog was running within the
> same lguest instance?
No.
The CPU hog is running in the host. A single instance of lguest using
busybox is started in another shell. When it reaches a shell prompt,
-that- shell is occassionally unresponsive for long stretches.
For the purposes of CFS, of course, the shell running inside lguest is
invisible.
Also, for comparison, running the same kernel and disk image inside
qemu doesn't show any lag, despite being substantially slower (no
kernel/VT acceleration).
--
Mathematics is the supreme nostalgia of our time.
next prev parent reply other threads:[~2007-06-04 19:28 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-04 17:37 Interesting interaction between lguest and CFS Matt Mackall
2007-06-04 17:54 ` Ingo Molnar
2007-06-04 18:41 ` Matt Mackall
2007-06-05 7:19 ` Ingo Molnar
2007-06-05 14:03 ` Matt Mackall
2007-06-05 15:14 ` Dmitry Adamushko
2007-06-05 15:41 ` Dmitry Adamushko
2007-06-05 19:50 ` Ingo Molnar
2007-06-06 20:23 ` Matt Mackall
2007-06-08 9:34 ` Ingo Molnar
2007-06-08 10:18 ` Ingo Molnar
2007-06-04 18:11 ` Ingo Molnar
2007-06-04 18:42 ` Matt Mackall
2007-06-04 19:12 ` Ingo Molnar
2007-06-04 19:27 ` Matt Mackall [this message]
2007-06-04 19:40 ` Ingo Molnar
2007-06-04 19:59 ` Matt Mackall
2007-06-04 20:13 ` Ingo Molnar
2007-06-04 20:20 ` Ingo Molnar
2007-06-04 20:15 ` James Morris
2007-06-04 20:24 ` Ingo Molnar
2007-06-04 22:58 ` Olof Johansson
2007-06-05 1:02 ` Rusty Russell
2007-06-05 1:24 ` Stephen Rothwell
2007-06-05 2:23 ` Olof Johansson
2007-06-05 0:18 ` Rusty Russell
2007-06-05 2:31 ` Rusty Russell
2007-06-05 4:18 ` Matt Mackall
2007-06-05 4:37 ` Rusty Russell
2007-06-05 13:49 ` Matt Mackall
2007-06-05 19:38 ` Ingo Molnar
2007-06-05 10:43 ` Ingo Molnar
2007-06-05 19:08 ` Ingo Molnar
2007-06-06 20:19 ` Matt Mackall
2007-06-05 2:34 ` Matt Mackall
2007-06-05 7:10 ` Ingo Molnar
2007-06-05 9:23 ` Ingo Molnar
2007-06-05 14:06 ` Matt Mackall
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