Re: 2.5.36-mm1 dbench 512 profiles

From: Dipankar Sarma (
Date: Fri Sep 20 2002 - 15:28:58 EST

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 -

The latest release is 2.5.36-mm1.
rcu_ltimer and read_barrier_depends are pre-requisites for dcache_rcu.


Dipankar Sarma  <>
Linux Technology Center, IBM Software Lab, Bangalore, India.
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