From: Dennis Jacobfeuerborn <dennisml@conversis.de>
To: Erwan Velu <erwan@enovance.com>
Cc: "fio@vger.kernel.org" <fio@vger.kernel.org>
Subject: Re: no slat log
Date: Wed, 07 Aug 2013 12:36:19 +0200 [thread overview]
Message-ID: <52022323.2030208@conversis.de> (raw)
In-Reply-To: <52020EFA.6060208@enovance.com>
On 07.08.2013 11:10, Erwan Velu wrote:
> On 07/08/2013 00:08, Dennis Jacobfeuerborn wrote:
>> Hi,
>> when I try to create logs with fio I get bw, iops, lat, clat and slat
>> logs but the slat log always has a size of 0 bytes. Is this a bug or
>> is data for this log only generated with specific options for fio?
>>
> Dennis,
>
> I've been trying this on my 2.1.2 with the following job :
>
> [read-sda-4k-para]
> bs=4k
> filename=/dev/sda
> rw=read
> write_lat_log=lat.log
>
> On my side, the slat file is perfectly filled.
>
> Can you provide a testing procedure & the version you use ?
I just tested the job above and these are the files produced:
[dennis@nexus fio]$ ls -l
total 11272
-rw-r--r--. 1 root root 5767080 7. Aug 12:31 lat.log_clat.log
-rw-r--r--. 1 root root 5767087 7. Aug 12:31 lat.log_lat.log
-rw-r--r--. 1 root root 0 7. Aug 12:31 lat.log_slat.log
-rw-rw-r--. 1 dennis dennis 84 7. Aug 12:31 logtest.fio
There are not errors or warnings during the fio run so it's not clear
why the file ends up being empty.
Regards,
Dennis
next prev parent reply other threads:[~2013-08-07 10:36 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-06 22:08 no slat log Dennis Jacobfeuerborn
2013-08-07 9:10 ` Erwan Velu
2013-08-07 10:36 ` Dennis Jacobfeuerborn [this message]
2013-08-07 12:30 ` Erwan Velu
2013-08-08 20:55 ` Jens Axboe
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