From: Jens Axboe <axboe@kernel.dk>
To: Ley Foon Tan <lftan.linux@gmail.com>, fio@vger.kernel.org
Subject: Re: fio with polling mode
Date: Tue, 15 Mar 2016 11:58:00 -0700 [thread overview]
Message-ID: <56E85B38.9010904@kernel.dk> (raw)
In-Reply-To: <CAFiDJ59S0zhHDNbbron+Q1X06kBZ2i24VXYzHrSbrr0ujAR74w@mail.gmail.com>
On 03/15/2016 04:20 AM, Ley Foon Tan wrote:
> Hi
>
> In the kernel v4.4 above, we can use polling mode for the NVMe data
> transfer with command below:
>
> echo 1 > /sys/block/nvme0n1/queue/io_poll
>
> We can see NVMe throughput increase with polling mode with dd command.
> Can we run fio with polling mode as well? If yes, what are the correct
> fio parameters/arguments should we use?
direct=1, and use one of the sync IO engines (psync would be a good
one). And enable io_poll like you did above, then fio should be in
polled mode.
--
Jens Axboe
next prev parent reply other threads:[~2016-03-15 18:58 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-15 11:20 fio with polling mode Ley Foon Tan
2016-03-15 18:58 ` Jens Axboe [this message]
2016-03-16 11:18 ` Ley Foon Tan
2016-03-16 16:25 ` Jens Axboe
2016-03-17 9:39 ` Ley Foon Tan
2016-03-17 16:18 ` Jens Axboe
2016-03-18 7:09 ` Ley Foon Tan
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