From: Ming Lei <ming.lei@redhat.com>
To: fio@vger.kernel.org
Subject: Re: Can't setup io_uring for buffered IO
Date: Mon, 16 Aug 2021 22:50:31 +0800 [thread overview]
Message-ID: <YRp7Nx30QAXORcsN@T590> (raw)
In-Reply-To: <YRpT0019mbS1jSE4@T590>
On Mon, Aug 16, 2021 at 08:02:27PM +0800, Ming Lei wrote:
> Hello Guys,
>
> I tried to use the following script to run buffered io with io_uring,
> but looks it always complains with 'Operation not supported', and any
> idea to make it working?
>
> ++ /root/git/fio/fio --readonly --name=onessd --filename=/dev/nvme0n1 --filesize=16m --rw=randread --bs=4k --direct=0 --overwrite=0 --numjobs=1 --iodepth=1 --time_based=1 --runtime=1 --ioengine=io_uring --registerfiles --fixedbufs --hipri=1 --gtod_reduce=1 --group_reporting
> onessd: (g=0): rw=randread, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=io_uring, iodepth=1
> fio-3.25-229-gdf9e8
> Starting 1 process
> fio: io_u error on file /dev/nvme0n1: Operation not supported: read offset=1011712, buflen=4096
> fio: pid=3278, err=95/file:io_u.c:1841, func=io_u error, error=Operation not supported
>
> onessd: (groupid=0, jobs=1): err=95 (file:io_u.c:1841, func=io_u error, error=Operation not supported): pid=3278: Mon Aug 16 12:01:17 2021
Just figured out that --hipri can't be applied for buffered IO.
--
Ming
next prev parent reply other threads:[~2021-08-16 14:51 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-16 12:02 Can't setup io_uring for buffered IO Ming Lei
2021-08-16 14:50 ` Ming Lei [this message]
2021-08-17 18:28 ` Jens Axboe
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