On Tue, Apr 09, 2013 at 09:02:21PM +0000, Andre Oppermann wrote: A> Author: andre A> Date: Tue Apr 9 21:02:20 2013 A> New Revision: 249318 A> URL: http://svnweb.freebsd.org/changeset/base/249318 A> A> Log: A> Change certain heavily used network related mutexes and rwlocks to A> reside on their own cache line to prevent false sharing with other A> nearby structures, especially for those in the .bss segment. A> A> NB: Those mutexes and rwlocks with variables next to them that get A> changed on every invocation do not benefit from their own cache line. A> Actually it may be net negative because two cache misses would be A> incurred in those cases.
Although change is theoretically correct, IMO, such change should be supported by experimental performance benchmarking data. -- Totus tuus, Glebius. _______________________________________________ svn-src-head@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
