From: Takashi Iwai <tiwai@suse.de>
To: dipankar@in.ibm.com
Cc: "Paul E. McKenney" <paulmck@us.ibm.com>,
Arjan van de Ven <arjanv@redhat.com>,
Robert Love <rml@ximian.com>, Andrew Morton <akpm@osdl.org>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] RCU for low latency (experimental)
Date: Mon, 29 Mar 2004 12:43:11 +0200 [thread overview]
Message-ID: <s5hvfkovsqo.wl@alsa2.suse.de> (raw)
In-Reply-To: <s5hu10898za.wl@alsa2.suse.de>
At Sun, 28 Mar 2004 19:28:41 +0200,
I wrote:
>
> > > anyway, i confirmed that with the original krcud patch the latency
> > > with dcache flood can be eliminated.
> >
> > Does the throttle-rcu patch also help eliminate dcache flood ? You
> > can try by just changing count >= rcumaxbatch to ++count > rcumaxbatch.
>
> i'll try it later.
the throttle-rcu patch does work indeed well even without preemption.
i've tested maxbatch=16 and plugticks=0. in the older version, there
was 20ms long latency, while in the patched version, no measurable
latency more than 1ms.
thanks for your work!
Takashi
next prev parent reply other threads:[~2004-03-29 10:43 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-03-23 10:17 [PATCH] RCU for low latency (experimental) Dipankar Sarma
2004-03-23 10:25 ` Andrew Morton
2004-03-23 10:41 ` Dipankar Sarma
2004-03-23 10:35 ` Arjan van de Ven
2004-03-23 10:45 ` Dipankar Sarma
2004-03-23 12:31 ` Andrea Arcangeli
2004-03-23 12:40 ` Dipankar Sarma
2004-03-23 12:50 ` Andrea Arcangeli
2004-03-24 17:26 ` Paul E. McKenney
2004-03-24 17:51 ` Andrea Arcangeli
2004-03-24 20:02 ` Paul E. McKenney
2004-03-24 23:36 ` Andrea Arcangeli
2004-03-25 0:43 ` Paul E. McKenney
2004-03-24 21:39 ` Dipankar Sarma
2004-03-24 22:53 ` Andrea Arcangeli
2004-03-24 23:11 ` Dipankar Sarma
2004-03-24 23:34 ` Andrea Arcangeli
2004-03-24 23:46 ` Dipankar Sarma
2004-03-24 23:51 ` Andrea Arcangeli
2004-03-28 16:53 ` Takashi Iwai
2004-03-28 17:20 ` Dipankar Sarma
2004-03-28 17:28 ` Takashi Iwai
2004-03-29 10:43 ` Takashi Iwai [this message]
2004-03-29 12:20 ` Dipankar Sarma
2004-03-23 12:40 ` Arjan van de Ven
2004-03-23 12:29 ` Andrea Arcangeli
2004-03-23 12:34 ` Dipankar Sarma
2004-03-23 12:46 ` Andrea Arcangeli
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