From: Jens Axboe <axboe@kernel.dk>
To: Edoardo Comar <ECOMAR@uk.ibm.com>
Cc: fio@vger.kernel.org
Subject: Re: latency measurements when adding thinktime
Date: Fri, 17 May 2013 12:22:44 +0200 [thread overview]
Message-ID: <20130517102244.GV697@kernel.dk> (raw)
In-Reply-To: <OFDD7AB964.9096D732-ON80257B6E.00324017-80257B6E.0033AE26@uk.ibm.com>
On Fri, May 17 2013, Edoardo Comar wrote:
> Hi Jens,
>
> thanks a lot, I tried your suggestion straight away:
> The cpu line in the output shows that the job has not been idle at all.
> but even with thinktime_spin, the latency stays high at at 150ms.
>
> Note also that if I increase thinktime & thinktime_spin by another 10000
> us
> to a total of 20000, then the reported latency goes up another 150ms to a
> total of 300ms.
> Could this be a bug?
It certainly could. Let me take a look here and see if I can reproduce
it.
--
Jens Axboe
next prev parent reply other threads:[~2013-05-17 10:22 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-17 0:00 latency measurements when adding thinktime Edoardo Comar
2013-05-17 7:47 ` Jens Axboe
2013-05-17 9:24 ` Edoardo Comar
2013-05-17 10:22 ` Jens Axboe [this message]
2013-05-17 10:38 ` Edoardo Comar
2013-05-17 10:43 ` Jens Axboe
2013-05-17 10:48 ` Edoardo Comar
2013-05-17 10:50 ` Jens Axboe
2013-05-17 10:48 ` Jens Axboe
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