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From: Philippe W. <phi...@sk...> - 2011-11-09 22:48:54
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>> Bart, do you expect to continue the work on the fair scheduling in https://bugs.kde.org/show_bug.cgi?id=270006 ? > > Sorry, but I may take some time before I will have the time to > continue working on that patch. "some time" = a few hours ? nice work :). I am wondering if it is a good idea to implement the "sched-setaffinity" idea to avoid the cpu freq scaling perf. degradation: A.o. because it looks complex/hacky and also because using sched_setaffinity will override the affinity requested by the guest process if it also wants to play with affinity. Maybe it would be good enough to just document the cpu freq scaling strange behaviour, and suggests to either disable cpu frequency scaling when using Valgrind and/or use taskset to launch valgrind. Of course, as usual, the most excellent approach would be to make Valgrind really (or somewhat more) multi-threaded :). Philippe |