Re: Locking comment on shrink_caches()

Dipankar Sarma (dipankar@in.ibm.com)
Wed, 26 Sep 2001 10:34:24 +0530

In article <20010925.132816.52117370.davem@redhat.com> David S. Miller wrote:
> From: Rik van Riel <riel@conectiva.com.br>
> Date: Tue, 25 Sep 2001 17:24:21 -0300 (BRST)
>
> Or were you measuring loads which are mostly read-only ?

> When Kanoj Sarcar was back at SGI testing 32 processor Origin
> MIPS systems, pagecache_lock was at the top.

John Hawkes from SGI had published some AIM7 numbers that showed
pagecache_lock to be a bottleneck above 4 processors. At 32 processors,
half the CPU cycles were spent on waiting for pagecache_lock. The
thread is at -

http://marc.theaimsgroup.com/?l=lse-tech&m=98459051027582&w=2

Thanks
Dipankar

-- 
Dipankar Sarma  <dipankar@in.ibm.com> Project: http://lse.sourceforge.net
Linux Technology Center, IBM Software Lab, Bangalore, India.
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