From: Jens Axboe <axboe@kernel.dk>
To: Castor Fu <castor@egocast.org>, fio@vger.kernel.org
Subject: Re: deadlock in fio.. client/server
Date: Thu, 11 Sep 2014 17:07:26 -0600 [thread overview]
Message-ID: <54122B2E.4080202@kernel.dk> (raw)
In-Reply-To: <541209FF.2070503@kernel.dk>
On 09/11/2014 02:45 PM, Jens Axboe wrote:
> On 08/30/2014 08:41 AM, Castor Fu wrote:
>> I see what looks to me like a deadlock when running with multiple jobs
>> in client/server mode.
>> However, I'm not too used to debugging multithreaded code, so I
>> figured maybe some additional eyes would help.
>>
>> This is on a Gen8 HP DL380 (dual socket x86_64) running CentOS EL6.
>>
>> I haven't seen this when just running from the command line.
>>
>> I start the daemon with:
>>
>> fio --daemonize=/tmp/fio.pid.4987 --server=localhost,8098
>>
>> and a client with
>> fio --client=localhost 8098 --output=test_blk.20140830Z1419 test_bad2.fio
>>
>> #
>> [global]
>>
>> ioengine=libaio
>> thread=1
>> bs=4k
>> filename=/dev/sdb
>> size=1M
>> do_verify=1
>> iodepth=8
>> stonewall
>>
>> [writes]
>> rw=write
>> # 3 passes
>> # 4 fails
>> numjobs=4
>>
>> and sometimes (50% or higher with num_jobs=4) it hangs.
>
> Sorry for being late on this, I can reproduce it. Will take a look!
Committed a fix for this, can you check current -git? This is the fix:
http://git.kernel.dk/?p=fio.git;a=commit;h=44c8268d6e6d3b3f1efb1eb8a1c2d7bba1e8477b
--
Jens Axboe
next prev parent reply other threads:[~2014-09-11 23:07 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-30 14:41 deadlock in fio.. client/server Castor Fu
2014-09-11 20:45 ` Jens Axboe
2014-09-11 23:07 ` Jens Axboe [this message]
2014-09-12 6:34 ` Castor Fu
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=54122B2E.4080202@kernel.dk \
--to=axboe@kernel.dk \
--cc=castor@egocast.org \
--cc=fio@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.