From: Lee Revell <rlrevell@joe-job.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: linux-kernel <linux-kernel@vger.kernel.org>,
Linus Torvalds <torvalds@osdl.org>,
"Paul E. McKenney" <paulmck@us.ibm.com>
Subject: Re: RCU latency regression in 2.6.16-rc1
Date: Tue, 24 Jan 2006 02:58:02 -0500 [thread overview]
Message-ID: <1138089483.2771.81.camel@mindpipe> (raw)
In-Reply-To: <20060124075640.GA24806@elte.hu>
On Tue, 2006-01-24 at 08:56 +0100, Ingo Molnar wrote:
> * Lee Revell <rlrevell@joe-job.com> wrote:
>
> > I ported the latency tracer to 2.6.16 and got this 13ms latency within
> > a few hours. This is a regression from 2.6.15.
> >
> > It appears that RCU can invoke ipv4_dst_destroy thousands of times in
> > a single batch.
>
> could you try the PREEMPT_RCU patch below?
>
Sure. If it works do you see this making it in 2.6.16? Otherwise we
still would have a regression...
Lee
next prev parent reply other threads:[~2006-01-24 7:58 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 [this message]
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
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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