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From: Steven Rostedt <rostedt@goodmis.org>
To: Jan Kiszka <jan.kiszka@siemens.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
	RT <linux-rt-users@vger.kernel.org>, Ingo Molnar <mingo@elte.hu>,
	Thomas Gleixner <tglx@linutronix.de>
Subject: Re: 2.6.24.2-rt2
Date: Tue, 26 Feb 2008 10:15:40 -0500 (EST)	[thread overview]
Message-ID: <Pine.LNX.4.58.0802261013001.6116@gandalf.stny.rr.com> (raw)
In-Reply-To: <47C3FF82.6060900@siemens.com>



On Tue, 26 Feb 2008, Jan Kiszka wrote:

> Jan Kiszka wrote:
> > At this chance: We still see the same unbalanced sched-other load on our
> > NUMA box as Gernot once reported [1]:
> >
> > top - 11:19:20 up 4 min,  1 user,  load average: 29.52, 9.54, 3.37
> > Tasks: 502 total,  41 running, 461 sleeping,   0 stopped,   0 zombie
> > Cpu0  :100.0%us,  0.0%sy,  0.0%ni,  0.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
> > Cpu1  :100.0%us,  0.0%sy,  0.0%ni,  0.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
> > Cpu2  :100.0%us,  0.0%sy,  0.0%ni,  0.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
> > Cpu3  :100.0%us,  0.0%sy,  0.0%ni,  0.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
> > Cpu4  :  0.0%us,  0.3%sy,  0.0%ni, 99.7%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
> > Cpu5  :  0.0%us,  0.0%sy,  0.0%ni,100.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
> > Cpu6  :  0.0%us,  0.0%sy,  0.0%ni,100.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
> > Cpu7  :  0.0%us,  0.0%sy,  0.0%ni,100.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
> > Cpu8  :  0.0%us,  0.0%sy,  0.0%ni,100.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
> > Cpu9  :  0.0%us,  0.0%sy,  0.0%ni,100.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
> > Cpu10 :  0.0%us,  0.0%sy,  0.0%ni,100.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
> > Cpu11 :  0.0%us,  0.0%sy,  0.0%ni,100.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
> > Cpu12 :100.0%us,  0.0%sy,  0.0%ni,  0.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
> > Cpu13 :100.0%us,  0.0%sy,  0.0%ni,  0.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
> > Cpu14 :100.0%us,  0.0%sy,  0.0%ni,  0.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
> > Cpu15 :100.0%us,  0.0%sy,  0.0%ni,  0.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
> > Mem:  65513284k total,  1032032k used, 64481252k free,     6444k buffers
> > Swap:  3204896k total,        0k used,  3204896k free,    37312k cached
> >
>
> ETOOMANYKERNELS, this was from 2.6.23.12-rt14. 2.6.24.2-rt2 shows a
> different patter under identical load:

There has been CFS updates, which may account for the differences. Seems
better though.

>
> top - 12:55:27 up 2 min,  1 user,  load average: 9.97, 2.42, 0.81
> Tasks: 491 total,  42 running, 449 sleeping,   0 stopped,   0 zombie
> Cpu0  :100.0%us,  0.0%sy,  0.0%ni,  0.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
> Cpu1  : 99.7%us,  0.0%sy,  0.0%ni,  0.0%id,  0.0%wa,  0.0%hi,  0.3%si,  0.0%st
> Cpu2  :100.0%us,  0.0%sy,  0.0%ni,  0.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
> Cpu3  :100.0%us,  0.0%sy,  0.0%ni,  0.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
> Cpu4  :100.0%us,  0.0%sy,  0.0%ni,  0.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
> Cpu5  :100.0%us,  0.0%sy,  0.0%ni,  0.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
> Cpu6  :100.0%us,  0.0%sy,  0.0%ni,  0.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
> Cpu7  :100.0%us,  0.0%sy,  0.0%ni,  0.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
> Cpu8  :  0.0%us,  0.0%sy,  0.0%ni,100.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
> Cpu9  :  0.3%us,  0.3%sy,  0.0%ni, 99.3%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
> Cpu10 :100.0%us,  0.0%sy,  0.0%ni,  0.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
> Cpu11 :  0.0%us,  0.0%sy,  0.0%ni,100.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
> Cpu12 :100.0%us,  0.0%sy,  0.0%ni,  0.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
> Cpu13 :100.0%us,  0.0%sy,  0.0%ni,  0.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
> Cpu14 :100.0%us,  0.0%sy,  0.0%ni,  0.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
> Cpu15 :100.0%us,  0.0%sy,  0.0%ni,  0.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
> Mem:  65512480k total,   580704k used, 64931776k free,     8964k buffers
> Swap:  3204896k total,        0k used,  3204896k free,   129720k cached
>

What's the NUMA topology? What tasks are running, and at what priorities?

Those three idle CPUS, should they have tasks running on them?

-- Steve


  reply	other threads:[~2008-02-26 15:17 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-22  0:24 2.6.24.2-rt2 Steven Rostedt
2008-02-26 10:29 ` 2.6.24.2-rt2 Jan Kiszka
2008-02-26 12:01   ` 2.6.24.2-rt2 Jan Kiszka
2008-02-26 15:15     ` Steven Rostedt [this message]
2008-02-26 15:38       ` 2.6.24.2-rt2 Jan Kiszka
2008-02-26 16:55         ` 2.6.24.2-rt2 Steven Rostedt
2008-02-26 17:15           ` 2.6.24.2-rt2 Jan Kiszka

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