* Jie Chen <[EMAIL PROTECTED]> wrote: > The following is pthread_sync output for 2.6.21.7-cfs-v24 #1 SMP > kernel.
> 2 threads: > PARALLEL time = 11.106580 microseconds +/- 0.002460 > PARALLEL overhead = 0.617590 microseconds +/- 0.003409 > Output for Kernel 2.6.24-rc4 #1 SMP > PARALLEL time = 19.668450 microseconds +/- 0.015782 > PARALLEL overhead = 9.157945 microseconds +/- 0.018217 ok, so the problem is that this PARALLEL time has an additional +9 usecs overhead, right? I dont see this myself on a Core2 CPU: PARALLEL time = 10.446933 microseconds +/- 0.078849 PARALLEL overhead = 0.751732 microseconds +/- 0.177446 Ingo -- 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/