From: Jens Axboe <axboe@kernel.dk>
To: Hao Xu <haoxu@linux.alibaba.com>,
Pavel Begunkov <asml.silence@gmail.com>
Cc: io-uring <io-uring@vger.kernel.org>
Subject: Re: Question about poll_multi_file
Date: Thu, 3 Jun 2021 12:01:04 -0600 [thread overview]
Message-ID: <f2fa9534-e07c-fd18-759e-b3ca99b714a7@kernel.dk> (raw)
In-Reply-To: <e90a3bdd-d60c-9b82-e711-c7a0b4f32c09@linux.alibaba.com>
On 6/3/21 6:53 AM, Hao Xu wrote:
> Hi Jens,
> I've a question about poll_multi_file in io_do_iopoll().
> It keeps spinning in f_op->iopoll() if poll_multi_file is
> true (and we're under the requested amount). But in my
> understanding, reqs may be in different hardware queues
> for blk-mq device even in this situation.
> Should we consider the hardware queue number as well? Some
> thing like below:
That looks reasonable to me - do you have any performance
numbers to go with it?
--
Jens Axboe
next prev parent reply other threads:[~2021-06-03 18:02 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-03 12:53 Question about poll_multi_file Hao Xu
2021-06-03 18:01 ` Jens Axboe [this message]
2021-06-06 14:08 ` Hao Xu
2021-06-07 16:45 ` Pavel Begunkov
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