From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: Josh Triplett <josh@joshtriplett.org>
Cc: Tim Sander <tim01@vlsi.informatik.tu-darmstadt.de>,
linux-kernel@vger.kernel.org, linux-rt-users@vger.kernel.org,
mingo@elte.hu, laijs@cn.fujitsu.com, dipankar@in.ibm.com,
akpm@linux-foundation.org, mathieu.desnoyers@efficios.com,
niv@us.ibm.com, tglx@linutronix.de, peterz@infradead.org,
rostedt@goodmis.org, Valdis.Kletnieks@vt.edu,
dhowells@redhat.com, edumazet@google.com, darren@dvhart.com,
fweisbec@gmail.com, sbw@mit.edu, patches@linaro.org
Subject: Re: Does anyone use CONFIG_TINY_PREEMPT_RCU?
Date: Tue, 13 Nov 2012 17:07:03 -0800 [thread overview]
Message-ID: <20121114010703.GR2489@linux.vnet.ibm.com> (raw)
In-Reply-To: <20121114003641.GB7858@jtriplet-mobl1>
On Tue, Nov 13, 2012 at 04:36:42PM -0800, Josh Triplett wrote:
> On Tue, Nov 13, 2012 at 04:06:48PM -0800, Paul E. McKenney wrote:
> > On Wed, Nov 14, 2012 at 12:32:36AM +0100, Tim Sander wrote:
> > > Hi Paul
> > >
> > > Sorry english somehow i tried to shoehorn more than one sentence into one
> > > sentence in the last mail.
> > > > OK, how much memory does your device have?
> > > It's 128Mb of memory.
> >
> > That is a bit on the smaller side. But still quite large compared
> > to the 15K difference between CONFIG_TREE_PREEMPT_RCU and
> > CONFIG_TINY_PREEMPT_RCU.
>
> I'd also expect CONFIG_TINY_PREEMPT_RCU to have marginally more
> performance on a UP system, but probably not enough to matter.
Agreed, I would expect this to be down in the noise.
Thanx, Paul
prev parent reply other threads:[~2012-11-14 1:07 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-13 0:49 Does anyone use CONFIG_TINY_PREEMPT_RCU? Paul E. McKenney
2012-11-13 1:12 ` Frederic Weisbecker
2012-11-13 1:17 ` Josh Triplett
2012-11-13 1:34 ` Frederic Weisbecker
2012-11-13 1:42 ` Paul E. McKenney
2012-11-13 1:32 ` Paul E. McKenney
2012-11-13 14:46 ` Nick Bowler
2012-11-13 17:08 ` Paul E. McKenney
2012-11-13 17:56 ` Nick Bowler
2012-11-13 21:19 ` Paul E. McKenney
2012-11-13 21:47 ` Nick Bowler
2012-11-13 22:25 ` Paul E. McKenney
2012-11-13 22:40 ` Nick Bowler
2012-11-14 0:05 ` Paul E. McKenney
[not found] ` <CAGChsmOBB1yFNP5xSa06v+CYn0A=AjcZTyAzL8npWRdNYYLBZA@mail.gmail.com>
2012-11-13 23:04 ` Paul E. McKenney
2012-11-13 20:22 ` Tim Sander
2012-11-13 21:20 ` Paul E. McKenney
2012-11-13 23:32 ` Tim Sander
2012-11-14 0:06 ` Paul E. McKenney
2012-11-14 0:36 ` Josh Triplett
2012-11-14 1:07 ` Paul E. McKenney [this message]
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