From: Dipankar Sarma <dipankar@in.ibm.com>
To: Dave Hansen <haveblue@us.ibm.com>
Cc: maneesh@in.ibm.com, William Lee Irwin III <wli@holomorphy.com>,
Andrew Morton <akpm@digeo.com>,
linux-kernel@vger.kernel.org, viro@math.psu.edu,
Hanna Linder <hannal@us.ibm.com>
Subject: Re: 2.5.36-mm1 dbench 512 profiles
Date: Sat, 21 Sep 2002 01:58:58 +0530 [thread overview]
Message-ID: <20020921015858.C4357@in.ibm.com> (raw)
In-Reply-To: <20020920231020.A4357@in.ibm.com>; from dipankar@in.ibm.com on Fri, Sep 20, 2002 at 11:10:20PM +0530
On Fri, Sep 20, 2002 at 11:10:20PM +0530, Dipankar Sarma wrote:
> >
> > In any case, we all know often acquired global locks are a bad idea on
> > a 32-way, and should be avoided like the plague. I just wish we had a
> > dcache solution that didn't even need locks as much... :)
>
> You have one - dcache_rcu. It reduces the dcache_lock acquisition
> by about 65% over fastwalk.
I should clarify, this was with a webserver benchmark.
For those who want to use them, Maneesh's dcache_rcu-12 patch and my
RCU "performance" infrastructure patches are in -
http://sourceforge.net/project/showfiles.php?group_id=8875&release_id=111743
The latest release is 2.5.36-mm1.
rcu_ltimer and read_barrier_depends are pre-requisites for dcache_rcu.
Thanks
--
Dipankar Sarma <dipankar@in.ibm.com> http://lse.sourceforge.net
Linux Technology Center, IBM Software Lab, Bangalore, India.
next prev parent reply other threads:[~2002-09-20 20:19 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-09-19 22:30 William Lee Irwin III
2002-09-19 23:18 ` Hanna Linder
2002-09-19 23:38 ` Andrew Morton
2002-09-19 23:45 ` Hanna Linder
2002-09-20 0:08 ` William Lee Irwin III
2002-09-20 4:02 ` William Lee Irwin III
2002-09-20 7:59 ` Maneesh Soni
2002-09-20 8:06 ` William Lee Irwin III
2002-09-20 12:03 ` William Lee Irwin III
2002-09-20 18:51 ` Hanna Linder
2002-09-20 20:32 ` Hanna Linder
2002-09-20 20:54 ` Dipankar Sarma
2002-09-20 20:39 ` William Lee Irwin III
2002-09-20 21:30 ` Martin J. Bligh
2002-09-20 23:11 ` William Lee Irwin III
2002-09-20 23:22 ` Martin J. Bligh
2002-09-21 7:52 ` William Lee Irwin III
2002-09-20 14:34 ` Dave Hansen
2002-09-20 16:07 ` Martin J. Bligh
2002-09-20 17:48 ` Dipankar Sarma
2002-09-20 17:40 ` Dipankar Sarma
2002-09-20 20:28 ` Dipankar Sarma [this message]
2002-09-20 5:14 ` William Lee Irwin III
2002-09-20 6:59 ` William Lee Irwin III
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