From: Christoph Hellwig <hch@lst.de>
To: Bart Van Assche <bvanassche@acm.org>
Cc: Christoph Hellwig <hch@lst.de>, Jens Axboe <axboe@kernel.dk>,
linux-block@vger.kernel.org, Hannes Reinecke <hare@suse.de>,
Ming Lei <ming.lei@redhat.com>, Yu Kuai <yukuai3@huawei.com>
Subject: Re: [PATCH v2] block: Improve IOPS by removing the fairness code
Date: Thu, 28 Mar 2024 05:58:22 +0100 [thread overview]
Message-ID: <20240328045822.GA14655@lst.de> (raw)
In-Reply-To: <30519ebe-d370-4dbf-8f08-c28fa960b794@acm.org>
On Tue, Mar 26, 2024 at 10:36:25AM -0700, Bart Van Assche wrote:
> * Create a first request queue with completion time 1 ms and queue
> depth 64.
> * Create a second request queue with completion time 100 ms and that
> shares the tag set of the first request queue.
> * Submit I/O to both request queues.
>
> If I run that test I see a queue depth of about 60 for the second
> request queue and a queue depth of about 4 for the first request queue.
> This shows that both request queues make sufficient progress. This is
> because of the fairness algorithms in the sbitmap code.
This information needs to go into the commit log.
prev parent reply other threads:[~2024-03-28 4:58 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-25 22:14 [PATCH v2] block: Improve IOPS by removing the fairness code Bart Van Assche
2024-03-26 6:22 ` Christoph Hellwig
2024-03-26 17:36 ` Bart Van Assche
2024-03-28 4:58 ` Christoph Hellwig [this message]
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