Messages in this thread | | | Date | Fri, 19 Nov 2004 18:04:01 -0800 | From | William Lee Irwin III <> | Subject | Re: page fault scalability patch V11 [0/7]: overview |
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On Fri, Nov 19, 2004 at 11:42:39AM -0800, Christoph Lameter wrote: > A. make_rss_atomic. The earlier releases contained that patch but > then another variable (such as anon_rss) was introduced that would > have required additional atomic operations. Atomic rss operations > are also causing slowdowns on machines with a high number of cpus > due to memory contention. > B. remove_rss. Replace rss with a periodic scan over the vm to > determine rss and additional numbers. This was also discussed on > linux-mm and linux-ia64. The scans while displaying /proc data > were undesirable.
Split counters easily resolve the issues with both these approaches (and apparently your co-workers are suggesting it too, and have performance results backing it).
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