* Evgeniy Polyakov <[EMAIL PROTECTED]> wrote: > CPU: AMD64 processors, speed 2210.08 MHz (estimated) > Counted CPU_CLK_UNHALTED events (Cycles outside of halt state) with a unit > mask of 0x00 (No unit mask) count 100000 > samples % symbol name > 195750 67.3097 cpu_idle > 14111 4.8521 enter_idle > 4979 1.7121 IRQ0x51_interrupt > 4765 1.6385 tcp_v4_rcv
the pretty much only meaningful way to measure this is to: - start a really long 'ab' testrun. Something like "ab -c 8000 -t 600". - let the system get into 'steady state': i.e. CPU load at 100% - reset the oprofile counters, then start an oprofile run for 60 seconds. - stop the oprofile run. - stop the test. this way there wont be that many 'cpu_idle' entries in your profiles, and the profiles between the two event delivery mechanisms will be directly comparable. > In that tests I got epoll perf about 4400 req/s, kevent was about > 5300. So we are now up to epoll being 83% of kevent's performance - while the noise of numbers seen today alone is around 100% ... Could you update the files two URLs that you posted before, with the code that you used for the above numbers: http://tservice.net.ru/~s0mbre/archive/kevent/evserver_epoll.c http://tservice.net.ru/~s0mbre/archive/kevent/evserver_kevent.c thanks, 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/
