Re: 2.5.36-mm1 dbench 512 profiles

Dipankar Sarma (dipankar@in.ibm.com)
Sat, 21 Sep 2002 01:58:58 +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.
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