Re: 2.5.36-mm1 dbench 512 profiles

From: William Lee Irwin III (
Date: Fri Sep 20 2002 - 03:06:28 EST

On Fri, 20 Sep 2002 05:48:38 +0530, William Lee Irwin III wrote:
>> As far as the dcache goes, I'll stick to observing and reporting. I'll
>> rerun with dcache patches applied, though.

On Fri, Sep 20, 2002 at 01:29:28PM +0530, Maneesh Soni wrote:
> For a 32-way system fastwalk will perform badly from dcache_lock
> point of view, basically due to increased lock hold time.
> dcache_rcu-12 should reduce dcache_lock contention and hold time. The
> patch uses RCU infrastructer patch and read_barrier_depends patch.
> The patches are available in Read-Copy-Update section on lse site at

ISTR Hubertus mentioning this at OLS, and it sounded like a problem to
me. I'm doing some runs with this to see if it fixes the problem.

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