From: Andi Kleen <andi@firstfloor.org>
To: Chris Mason <chris.mason@oracle.com>
Cc: linux-btrfs@vger.kernel.org
Subject: Re: Multi-device update
Date: Wed, 16 Apr 2008 20:10:28 +0200 [thread overview]
Message-ID: <48064114.5080304@firstfloor.org> (raw)
In-Reply-To: <200804161404.04202.chris.mason@oracle.com>
Chris Mason wrote:
> On Wednesday 16 April 2008, Andi Kleen wrote:
>> Chris Mason <chris.mason@oracle.com> writes:
>>> On Wednesday 16 April 2008, Andi Kleen wrote:
>>>> Chris Mason <chris.mason@oracle.com> writes:
>>>>> The async work queues include code to checksum data pages without the
>>>>> FS mutex
>>>> Are they able to distribute work to other cores?
>>> Yes, it just uses a workqueue.
>> Unfortunately work queues don't do that by default currently. They
>> tend to process on the current CPU only.
>
> Well, I see multiple work queue threads using CPU time, but I haven't spent
> much time optimizing it. There's definitely room for improvement.
That's likely because you submit from multiple CPUs. But with a single
submitter running on a single CPU there shouldn't be any load balancing
currently.
-Andi
next prev parent reply other threads:[~2008-04-16 18:10 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-16 15:34 Multi-device update Chris Mason
2008-04-16 16:14 ` Andi Kleen
2008-04-16 16:54 ` Chris Mason
2008-04-16 17:43 ` Andi Kleen
2008-04-16 18:04 ` Chris Mason
2008-04-16 18:10 ` Andi Kleen [this message]
2008-04-16 18:14 ` Jens Axboe
2008-04-16 18:24 ` Andi Kleen
2008-04-16 18:26 ` Jens Axboe
2008-04-16 18:28 ` Chris Mason
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