From: Anthony Liguori <anthony@codemonkey.ws>
To: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [5578] Increase default IO timeout from 10ms to 5s
Date: Fri, 31 Oct 2008 15:13:21 -0500 [thread overview]
Message-ID: <490B66E1.2070604@codemonkey.ws> (raw)
In-Reply-To: <20081031194105.GC16128@shareable.org>
Jamie Lokier wrote:
> Anthony Liguori wrote:
>
>> With this patch, I see the number of wake-ups with an idle dynamic
>> ticks guest drop from 80 per second to about 15 times per second.
>>
>
> That's great, it really is, but shouldn't it be less than that?
>
> Did you look at the wakeup rate shown by powertop in the guest, to see
> how many extra wakeups are caused by QEMU internals?
>
I don't have a guest handy that I could run powertop on, but I know of
at least a few timers that can be gotten rid of (like the rtc timers).
Regards,
Anthony Liguori
> -- Jamie
>
>
>
prev parent reply other threads:[~2008-10-31 20:13 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-31 18:40 [Qemu-devel] [5578] Increase default IO timeout from 10ms to 5s Anthony Liguori
2008-10-31 18:52 ` Anthony Liguori
2008-11-02 19:08 ` [Qemu-devel] " Jan Kiszka
2008-11-03 20:04 ` Anthony Liguori
2008-11-03 20:36 ` Jan Kiszka
2008-11-03 21:50 ` Jan Kiszka
2008-11-03 22:00 ` Anthony Liguori
2008-11-03 22:03 ` Jan Kiszka
2008-11-04 8:07 ` andrzej zaborowski
2008-11-04 8:22 ` Jan Kiszka
2008-11-04 8:33 ` andrzej zaborowski
2008-11-04 11:32 ` Jamie Lokier
2008-11-04 16:22 ` M. Warner Losh
2008-11-04 17:10 ` Jan Kiszka
2008-11-04 17:55 ` M. Warner Losh
2008-11-04 19:08 ` Jan Kiszka
2008-11-05 15:00 ` Jamie Lokier
2008-11-05 16:10 ` M. Warner Losh
2008-11-05 18:21 ` Jan Kiszka
2008-11-05 18:41 ` Daniel P. Berrange
2008-11-05 20:16 ` andrzej zaborowski
2008-11-05 20:28 ` Daniel P. Berrange
2008-11-05 23:38 ` Jamie Lokier
2008-11-06 0:53 ` Jamie Lokier
2008-11-06 5:19 ` M. Warner Losh
2008-11-04 8:29 ` Avi Kivity
2008-10-31 19:41 ` [Qemu-devel] " Jamie Lokier
2008-10-31 20:13 ` Anthony Liguori [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=490B66E1.2070604@codemonkey.ws \
--to=anthony@codemonkey.ws \
--cc=qemu-devel@nongnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).