From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Dhaval Giani <dhaval@linux.vnet.ibm.com>
Cc: vatsa@linux.vnet.ibm.com, Ingo Molnar <mingo@elte.hu>,
lkml <linux-kernel@vger.kernel.org>
Subject: Re: Regression in latest sched-git
Date: Wed, 13 Feb 2008 17:43:13 +0100 [thread overview]
Message-ID: <1202920993.6811.13.camel@twins> (raw)
In-Reply-To: <20080213163715.GB19570@linux.vnet.ibm.com>
On Wed, 2008-02-13 at 22:07 +0530, Dhaval Giani wrote:
> On Wed, Feb 13, 2008 at 10:04:44PM +0530, Dhaval Giani wrote:
> > > > On the same lines, I cant understand how we can be seeing 700ms latency
> > > > (below) unless we had: large number of active groups/users and large number of
> > > > tasks within each group/user.
> > >
> > > All I can say it that its trivial to reproduce these horrid latencies.
> > >
> >
> > Hi Peter,
> >
> > I've been trying to reproduce the latencies, and the worst I have
> > managed only 80ms. At an average I am getting around 60 ms. This is with
> > a make -j4 as root, and dhaval running other programs. (with maxcpus=1).
> >
>
> Totally missed here. Any more hints to reproduce?
Not really, this is the recipie I took from Lukas Hejtmanek's report and
it worked for me.
I'll see if I can find some time to try the ftrace patches to narrow
this down.
next prev parent reply other threads:[~2008-02-13 16:43 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-02-12 18:53 Regression in latest sched-git Dhaval Giani
2008-02-12 19:40 ` Peter Zijlstra
2008-02-13 3:00 ` Srivatsa Vaddagiri
2008-02-13 12:51 ` Peter Zijlstra
2008-02-13 16:34 ` Dhaval Giani
2008-02-13 16:37 ` Dhaval Giani
2008-02-13 16:43 ` Peter Zijlstra [this message]
2008-02-13 17:06 ` Srivatsa Vaddagiri
2008-02-14 11:20 ` Peter Zijlstra
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1202920993.6811.13.camel@twins \
--to=a.p.zijlstra@chello.nl \
--cc=dhaval@linux.vnet.ibm.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@elte.hu \
--cc=vatsa@linux.vnet.ibm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.