From: Jens Axboe <axboe@kernel.dk>
To: Roger Sibert <roger_sibert@xyratex.com>
Cc: FIO <fio@vger.kernel.org>
Subject: Re: Simulating bursts at different rates at irregular intervals?
Date: Thu, 27 Jun 2013 16:16:48 +0200 [thread overview]
Message-ID: <20130627141648.GY25599@kernel.dk> (raw)
In-Reply-To: <CABFR9T3w9iOFZbjffxam13yKv9xUSNnV5VcwzPiyUnhB_0frfg@mail.gmail.com>
On Thu, Jun 27 2013, Roger Sibert wrote:
> Just a thought that came to mind.
>
> To work around the problem would the following work?
> Run fio to get you max MB/s
> Write a script to generate you work/jobs file that has randomizes
> length of time for the job to run and % of max for it to run at.
That's a bit of a bother, though, since you have to collect data and
output from each individual run. And not only that, shutdown/startup
will make things less than smooth. It could potentially dirty your
results.
We could have something ala:
rate_sequence={10s:20M},{20s:5M}
or whatever, which runs 10s at 20M/sec, then 20s at 5M/sec. Repeat.
Would be fairly easy to do.
--
Jens Axboe
next prev parent reply other threads:[~2013-06-27 14:16 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <255129448.30162533.1372322165642.JavaMail.root@framestore.com>
2013-06-27 8:37 ` Simulating bursts at different rates at irregular intervals? James Vanns
2013-06-27 9:02 ` Jens Axboe
2013-06-27 10:45 ` Roger Sibert
2013-06-27 14:16 ` Jens Axboe [this message]
2013-06-27 14:37 ` James Vanns
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