From: Avi Kivity <avi@qumranet.com>
To: Marcelo Tosatti <marcelo@kvack.org>
Cc: kvm-devel <kvm-devel@lists.sourceforge.net>
Subject: Re: [patch 1/3] QEMU/KVM: separate thread for IO handling
Date: Thu, 27 Mar 2008 17:49:47 +0200 [thread overview]
Message-ID: <47EBC21B.9030907@qumranet.com> (raw)
In-Reply-To: <20080327154859.GA8184@dmt>
Marcelo Tosatti wrote:
>>>
>>>
>> I still don't understand this. Timer expiration ought to be processed
>> in the iothread, when SIGALRM is dequeued, and be completely unrelated
>> to whatever vcpu 0 is doing.
>>
>
> Yes, now it is unrelated. But before the patch it wasnt. So "currently
> the SIGALRM handler..." means the current code in kvm-userspace.git.
>
>
I see now. Okay, will merge.
>>> - Processing of IO events will not be unnecessarily interrupted.
>>>
>>>
>> What do you mean by this?
>>
>
> That SIGIO, SIGALRM and SIGUSR2 signals will not interrupt
> main_loop_wait(), since they are now blocked. Better latency, less time
> holding the mutex lock
Signals are blocked in current git, they can only interrupt the guest,
not the host.
--
error compiling committee.c: too many arguments to function
-------------------------------------------------------------------------
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next prev parent reply other threads:[~2008-03-27 15:49 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-27 15:09 [patch 0/3] QEMU dedicated IO thread Marcelo Tosatti
2008-03-27 15:09 ` [patch 1/3] QEMU/KVM: separate thread for IO handling Marcelo Tosatti
2008-03-27 15:23 ` Avi Kivity
2008-03-27 15:48 ` Marcelo Tosatti
2008-03-27 15:49 ` Avi Kivity [this message]
2008-03-27 15:09 ` [patch 2/3] QEMU/KVM: add function to handle signals Marcelo Tosatti
2008-03-27 15:25 ` Avi Kivity
2008-03-27 15:57 ` Marcelo Tosatti
2008-03-27 15:57 ` Avi Kivity
2008-03-27 16:55 ` Avi Kivity
2008-03-27 15:09 ` [patch 3/3] QEMU/libkvm: dont create vcpu0 thread Marcelo Tosatti
2008-03-27 15:55 ` Avi Kivity
2008-03-27 15:54 ` [patch 0/3] QEMU dedicated IO thread Avi Kivity
2008-03-27 19:06 ` Avi Kivity
2008-03-27 20:21 ` Marcelo Tosatti
-- strict thread matches above, loose matches on Subject: below --
2008-04-02 23:20 [patch 0/3] separate thread for IO handling V3 Marcelo Tosatti
2008-04-02 23:20 ` [patch 1/3] QEMU/KVM: separate thread for IO handling Marcelo Tosatti
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