Re: dcache_rcu [performance results]

Martin J. Bligh (mbligh@aracnet.com)
Mon, 04 Nov 2002 09:29:14 -0800

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> Clearly dcache_lock is the killer when 'ps' command is used in
> the benchmark. My guess (without looking at 'ps' code) is that
> it has to open/close a lot of files in /proc and that increases
> the number of acquisitions of dcache_lock. Increased # of acquisition
> add to cache line bouncing and contention.

Strace it - IIRC it does 5 opens per PID. Vomit.

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