From: Michael Tokarev <mjt@tls.msk.ru>
To: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Frederic Weisbecker <fweisbec@gmail.com>,
kvm <kvm@vger.kernel.org>
Subject: Re: kvm guest: hrtimer: interrupt too slow
Date: Sat, 10 Oct 2009 01:22:16 +0400 [thread overview]
Message-ID: <4ACFA988.6070500@msgid.tls.msk.ru> (raw)
In-Reply-To: <20091008195232.GA8350@amt.cnet>
Marcelo Tosatti wrote:
[snip]
> Would be useful to collect sar (sar -B -b -u) output every one second
> in both host/guest. You already mentioned load was low, but this should
> give more details.
Here we go: http://www.corpit.ru/mjt/hrtimer-interrupt-too-slow/
Two incindents - cases when hrtimer: interrupt is too slow were
reported in the guest (with Marcelo's patch so that min_delta is
increased to 50% only), happened at 11:44:48 and 21:46:56 (as
shown in guest-dmesg file). For both, there's `sar -BWbd' output
for a 2-minute interval (starting one minute before the delay
and ending one minute after) from both host and guest.
> Was there swapping going on?
Not as far as I can see, and sar output agrees.
/mjt
next prev parent reply other threads:[~2009-10-09 21:22 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-29 13:12 kvm guest: hrtimer: interrupt too slow Michael Tokarev
2009-09-29 13:47 ` Avi Kivity
2009-09-29 13:58 ` Michael Tokarev
2009-10-05 10:47 ` Avi Kivity
2009-10-03 23:12 ` Marcelo Tosatti
[not found] ` <4AC88E7E.8050909@msgid.tls.msk.ru>
2009-10-05 0:50 ` Marcelo Tosatti
2009-10-05 9:31 ` Michael Tokarev
2009-10-06 13:30 ` Michael Tokarev
2009-10-07 23:17 ` Frederic Weisbecker
2009-10-08 0:54 ` Marcelo Tosatti
2009-10-08 7:54 ` Michael Tokarev
2009-10-08 8:06 ` Thomas Gleixner
2009-10-08 8:14 ` Michael Tokarev
2009-10-08 9:29 ` Thomas Gleixner
2009-10-08 14:06 ` Michael Tokarev
2009-10-08 15:06 ` Thomas Gleixner
2009-10-08 19:52 ` Marcelo Tosatti
2009-10-09 21:22 ` Michael Tokarev [this message]
2009-10-09 22:27 ` Frederic Weisbecker
2009-10-09 22:34 ` Michael Tokarev
2009-10-10 9:18 ` Michael Tokarev
2009-10-10 9:24 ` Frederic Weisbecker
2009-10-10 17:37 ` Marcelo Tosatti
2009-10-08 8:05 ` Thomas Gleixner
2009-10-08 19:22 ` Marcelo Tosatti
2009-10-08 20:25 ` Thomas Gleixner
2009-10-08 21:02 ` Michael Tokarev
2009-10-10 17:32 ` [PATCH] tune hrtimer_interrupt hang logic Marcelo Tosatti
2009-10-08 8:09 ` kvm guest: hrtimer: interrupt too slow Michael Tokarev
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