On Thursday, January 19, 2012 12:57:50 am David Xu wrote: > rdtsc() may not work on SMP, so I have updated it to use clock_gettime > to get total time. > http://people.freebsd.org/~davidxu/bench/semaphore2/ > <http://people.freebsd.org/%7Edavidxu/bench/semaphore2/> > > Still, lfence is a lot faster than atomic lock.
http://www.freebsd.org/~jhb/patches/amd64_fence.patch This the patch I've had for quite a while. Can you retest with this? You'll probably have to install the updated header in /usr/include as well. -- John Baldwin _______________________________________________ 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"
