On Fri, 2015-06-26 at 13:27 -0400, Waiman Long wrote: > I am glad that the qspinlock patch helps. May I know what kind of > machine (cpu type, # of sockets, etc) that you are running the test on? > Usually the more sockets the machine has, the bigger the improvement you > will see.
This particular host had two Intel(R) Xeon(R) CPU E5-2696 v2 @ 2.50GHz (12 cores per socket, total of 48 hyper threads) Note that if pipebench uses 48 threads (instead of 16 as my previous mail did), there is almost no degradation. lpaa23:~# ./pipebench -n 16 threads:16 sleep:30 pinned:1 total operations: 20228142, ops/sec 674271 20228142 lpaa23:~# ./pipebench -n 48 threads:48 sleep:30 pinned:1 total operations: 19763616, ops/sec 658787 19763616 Thanks -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
