From: Paolo Bonzini <pbonzini@redhat.com>
To: Sergey Fedorov <serge.fdrv@gmail.com>, qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] Timer list lock contention
Date: Wed, 29 Oct 2014 19:46:26 +0100 [thread overview]
Message-ID: <54513602.3090306@redhat.com> (raw)
In-Reply-To: <54511E21.10208@gmail.com>
On 10/29/2014 06:04 PM, Sergey Fedorov wrote:
> Hi!
>
> I am wondering is there any case when timer list lock could be under
> contention?
Most of the time, the timer list is accessed under the "big QEMU lock"
(qemu_mutex_lock_iothread/qemu_mutext_unlock_iothread), so the timer
list lock itself shouldn't have contention at all.
That said, there are plans to decrease the cost of the lock by not
taking it at all in some cases.
Paolo
prev parent reply other threads:[~2014-10-29 18:46 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-29 17:04 [Qemu-devel] Timer list lock contention Sergey Fedorov
2014-10-29 18:46 ` Paolo Bonzini [this message]
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