> The big one is lru_list_lock, of course. I'll be releasing code in
> the next couple of days which should take that off the map. Testing
> would be appreciated.
Ill be glad to run this again with your patch. Also, John Hawkes
has an even bigger system and keeps hitting lru_list_lock too.
>
> I have a concern about the lockmeter results. Lockmeter appears
> to be measuring lock frequency and hold times and contention. But
> is it measuring the cost of the cacheline transfers?
This has come up a few times on lse-tech. Lockmeter doesnt
measure cacheline hits/misses/bouncing. However, someone said
kernprof could be used to access performance registers on the Pentium
chip to get this info. I don't know anyone who has tried that though.
I am working on a patch to decrease cacheline bouncing and it
would be great to see some specific results. Is anyone working on a tool
that could measure cache hits/misses/bouncing?
Hanna
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