From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: john stultz <johnstul@us.ibm.com>, Ingo Molnar <mingo@elte.hu>,
Thomas Gleixner <tglx@linutronix.de>,
Oleg Nesterov <oleg@tv-sign.ru>,
LKML <linux-kernel@vger.kernel.org>,
Dipankar Sarma <dipankar@in.ibm.com>,
RT <linux-rt-users@vger.kernel.org>
Subject: Re: [PATCH RT] convert RCU Preempt tasklet into softirq.
Date: Thu, 7 Jun 2007 21:16:51 -0700 [thread overview]
Message-ID: <20070608041651.GA19912@linux.vnet.ibm.com> (raw)
In-Reply-To: <1181247369.10408.20.camel@localhost.localdomain>
On Thu, Jun 07, 2007 at 04:16:09PM -0400, Steven Rostedt wrote:
> On Thu, 2007-06-07 at 14:51 -0400, Steven Rostedt wrote:
>
> > There might still be an issue here. With the patch I'm getting a really
> > slow response time on networking. But that be because of other patches I
> > have applied.
>
> I removed this patch and I can still get the network slowdown/hang. So
> this patch is unrelated to this issue. RCU on the otherhand has not been
> cleared of suspicion.
Might the slowdown be due to different kernel threads running at different
priorities? I could easily believe that changing the priority of the
kernel thread processing RCU callbacks could have a noticeable effect
on performance in some cases.
In other news, passed a set of kernbenches at this end, so starting
an rcutorture.
Thanx, Paul
next prev parent reply other threads:[~2007-06-08 4:16 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1181180051.18444.31.camel@localhost.localdomain>
[not found] ` <20070607041411.GB1783@linux.vnet.ibm.com>
[not found] ` <1181226138.18444.54.camel@localhost.localdomain>
[not found] ` <20070607161754.GA11941@linux.vnet.ibm.com>
2007-06-07 18:26 ` [PATCH RT] convert RCU Preempt tasklet into softirq Steven Rostedt
2007-06-07 18:51 ` Steven Rostedt
2007-06-07 20:16 ` Steven Rostedt
2007-06-08 4:16 ` Paul E. McKenney [this message]
2007-06-08 15:00 ` Paul E. McKenney
2007-06-07 21:02 ` Paul E. McKenney
2007-06-08 15:27 ` Steven Rostedt
2007-06-08 19:36 ` Paul E. McKenney
2007-06-08 19:43 ` Steven Rostedt
2007-06-08 20:00 ` Paul E. McKenney
2007-09-06 17:52 ` Clark Williams
2007-09-06 18:06 ` Paul E. McKenney
2007-09-07 12:30 ` BUG: unable to handle kernel paging joel silvestre
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=20070608041651.GA19912@linux.vnet.ibm.com \
--to=paulmck@linux.vnet.ibm.com \
--cc=dipankar@in.ibm.com \
--cc=johnstul@us.ibm.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-rt-users@vger.kernel.org \
--cc=mingo@elte.hu \
--cc=oleg@tv-sign.ru \
--cc=rostedt@goodmis.org \
--cc=tglx@linutronix.de \
/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.