From: Lee Revell <rlrevell@joe-job.com>
To: paulmck@us.ibm.com
Cc: dipankar@in.ibm.com, Ingo Molnar <mingo@elte.hu>,
linux-kernel <linux-kernel@vger.kernel.org>,
Linus Torvalds <torvalds@osdl.org>
Subject: Re: RCU latency regression in 2.6.16-rc1
Date: Fri, 27 Jan 2006 13:55:22 -0500 [thread overview]
Message-ID: <1138388123.3131.26.camel@mindpipe> (raw)
In-Reply-To: <20060126191809.GC6182@us.ibm.com>
On Thu, 2006-01-26 at 11:18 -0800, Paul E. McKenney wrote:
> > Xorg-2154 0d.s. 213us : call_rcu_bh (rt_run_flush)
> > Xorg-2154 0d.s. 215us : local_bh_enable (rt_run_flush)
> > Xorg-2154 0d.s. 216us : local_bh_enable (rt_run_flush)
> > Xorg-2154 0d.s. 217us : local_bh_enable (rt_run_flush)
> > Xorg-2154 0d.s. 218us : local_bh_enable (rt_run_flush)
> > Xorg-2154 0d.s. 219us : local_bh_enable (rt_run_flush)
> > Xorg-2154 0d.s. 220us : local_bh_enable (rt_run_flush)
> > Xorg-2154 0d.s. 222us : local_bh_enable (rt_run_flush)
> > Xorg-2154 0d.s. 223us : call_rcu_bh (rt_run_flush)
> >
> > [ zillions of these deleted ]
> >
> > Xorg-2154 0d.s. 7335us : local_bh_enable (rt_run_flush)
>
> Dipankar's latest patch should hopefully address this problem.
>
> Could you please give it a spin when you get a chance?
Nope, no improvement at all, furthermore, the machine locked up once
under heavy disk activity.
I just got an 8ms+ latency from rt_run_flush that looks basically
identical to the above. It's still flushing routes in huge batches:
$ grep 'call_rcu_bh (rt_run_flush)' /proc/latency_trace | wc -l
2738
Lee
next prev parent reply other threads:[~2006-01-27 18:55 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-01-24 7:52 RCU latency regression in 2.6.16-rc1 Lee Revell
2006-01-24 7:56 ` Ingo Molnar
2006-01-24 7:58 ` Lee Revell
2006-01-24 8:01 ` Ingo Molnar
2006-01-24 8:03 ` Lee Revell
2006-01-24 8:11 ` Ingo Molnar
2006-01-24 8:07 ` Lee Revell
2006-01-24 8:13 ` Ingo Molnar
2006-01-24 8:15 ` Lee Revell
2006-01-24 9:17 ` Paul E. McKenney
2006-01-24 9:23 ` Ingo Molnar
2006-01-24 9:44 ` Lee Revell
2006-01-24 16:28 ` Dipankar Sarma
2006-01-24 21:38 ` Dipankar Sarma
2006-01-25 21:28 ` Lee Revell
2006-01-25 22:56 ` Ingo Molnar
2006-01-25 23:13 ` Lee Revell
2006-01-26 19:18 ` Paul E. McKenney
2006-01-27 18:55 ` Lee Revell [this message]
2006-01-28 17:03 ` Dipankar Sarma
2006-01-28 18:00 ` Lee Revell
2006-01-28 18:51 ` Lee Revell
2006-01-28 19:34 ` Dipankar Sarma
2006-01-28 19:46 ` Lee Revell
2006-01-28 19:52 ` Eric Dumazet
2006-01-29 7:38 ` Lee Revell
2006-01-29 7:51 ` Ingo Molnar
2006-01-29 8:21 ` Lee Revell
2006-01-30 4:36 ` Paul E. McKenney
2006-01-30 4:55 ` Eric Dumazet
2006-01-30 5:11 ` Paul E. McKenney
2006-01-30 5:52 ` David S. Miller
2006-01-30 10:00 ` Paul E. McKenney
2006-02-12 0:45 ` Lee Revell
2006-01-24 16:57 ` Dipankar Sarma
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