From: "Sébastien Dugué" <sebastien.dugue@bull.net>
To: Lee Revell <rlrevell@joe-job.com>
Cc: Steven Rostedt <rostedt@goodmis.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Ingo Molnar <mingo@elte.hu>
Subject: Re: preempt-rt, NUMA and strange latency traces
Date: Thu, 09 Feb 2006 12:24:35 +0100 [thread overview]
Message-ID: <1139484275.5706.19.camel@frecb000686> (raw)
In-Reply-To: <1139465045.30058.31.camel@mindpipe>
On Thu, 2006-02-09 at 01:04 -0500, Lee Revell wrote:
> On Wed, 2006-02-08 at 11:45 +0100, Sébastien Dugué wrote:
> > The more I think about it, the more I tend to believe it's hardware
> > related. It seems as if the CPU just hangs for ~27 ms before
> > resuming processing.
>
> That would be an exceptionally long latency - you would probably notice
> it if the mouse froze, VOIP dropped out, ping stops, etc for 30ms.
>
It's a test machine and I use it remotely with console redirected so
no mouse, no RT applications aside from my silly nanosleep() loop. But
I do notice that that test sometimes takes more time (ie when I get
those weird latencies).
Sébastien.
next prev parent reply other threads:[~2006-02-09 11:21 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-02-07 11:28 Sébastien Dugué
2006-02-08 9:41 ` Steven Rostedt
2006-02-08 10:25 ` Ingo Molnar
2006-02-08 10:47 ` Sébastien Dugué
2006-02-08 10:45 ` Sébastien Dugué
2006-02-08 16:49 ` john stultz
2006-02-09 11:11 ` Sébastien Dugué
2006-02-09 11:26 ` Sébastien Dugué
2006-02-09 18:54 ` john stultz
2006-02-10 13:07 ` Sébastien Dugué
2006-02-10 19:07 ` Lee Revell
2006-02-09 6:04 ` Lee Revell
2006-02-09 11:24 ` Sébastien Dugué [this message]
2006-02-09 20:02 ` Lee Revell
2006-02-10 13:18 ` Sébastien Dugué
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