I also ran it with the 3.6 kernel ( http://kernel.ubuntu.com/~kernel- ppa/mainline/v3.6-quantal/ ) and just like with 3.4, the performance is about the same, if not worse.
Here are the results: mutex 1 thread real 0m 0.545s user 0m 0.520s sys 0m 0.000s 2 threads real 0m 3.550s user 0m 3.636s sys 0m 3.380s 4 threads real 0m14.357s user 0m11.073s sys 0m40.387s 8 threads real 0m29.686s user 0m19.409s sys 1m34.174s 16 threads real 0m59.138s user 0m38.114s sys 3m17.548s benaphore 1 thread real 0m 0.318s user 0m 0.316s sys 0m 0.000s 2 threads real 0m 7.124s user 0m 6.332s sys 0m 7.248s 4 threads real 0m19.999s user 0m15.173s sys 0m54.255s 8 threads real 0m41.673s user 0m26.182s sys 2m19.821s 16 threads real 1m17.915s user 0m55.843s sys 4m15.032s mutex2 1 thread real 0m 0.319s user 0m 0.312s sys 0m 0.004s 2 threads real 0m 0.823s user 0m 0.880s sys 0m 0.724s 4 threads real 0m 2.921s user 0m 3.892s sys 0m 7.612s 8 threads real 0m 4.272s user 0m 4.984s sys 0m11.709s 16 threads real 0m 8.097s user 0m 9.245s sys 0m22.981s -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1058864 Title: Poor mutex and semaphore performance To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1058864/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
