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
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