cat hpet > /sys/devices/system/clocksource/clocksource0/current_clocksource
Ben B wrote: > I feel like such a linux nub... how do you set your clocksource? > > On Fri, Mar 6, 2009 at 11:56 PM, The Universes <[email protected]>wrote: > >> Do you think dropping it down to 500HZ is a better choice or do you >> suggest something else? If yes, does 500HZ still maintain 500FPS? >> >> Thanks! >> >> Gary Stanley wrote: >>> At 10:33 PM 3/6/2009, The Universes wrote: >>>> I'm running 4 32 man TF2 servers at 500fps (66 tick) and I'm wondering >>>> if having kernel at 1000HZ (not tickless) with PREEMPT is necessary? >>>> Is that putting unnecessary strain on my CPU (Q9300)? >>>> >>>> My second question is if you guys use HPET as your clocksource >>>> $ cat /sys/devices/system/clocksource/clocksource0/available_clocksource >>>> tsc hpet acpi_pm jiffies >>>> >>>> $ cat /sys/devices/system/clocksource/clocksource0/current_clocksource >>>> tsc >>> >>> 1000hz kernels make nanosleep() expensive to call.. on a core2quad >>> calling usleep (which calls nanosleep) >>> >>> nanosleep: 6157 cycles >>> >>> That's alot of cpu time. Cranking up HZ makes interrupts fire so >>> often, so you get more accurate sleep behavior.. >>> >>> TSC lives on the CPU, so calling it is fairly cheap. HPET lives off >>> somewhere on a bridge, so you need to go out to PCI land to >>> read it. HPET is a decent choice, but overall the fastest one is TSC. >>> >>> >>> >>> >>>> Would you recommend changing that to HPET? >>>> >>>> I'm basically trying to lower CPU usage so it doesnt shoot up to 90% >>>> sometimes. >>>> >>>> Thanks, >>>> Dan >>>> >>>> _______________________________________________ >>>> To unsubscribe, edit your list preferences, or view the list >>>> archives, please visit: >>>> http://list.valvesoftware.com/mailman/listinfo/hlds_linux >>> >>> _______________________________________________ >>> To unsubscribe, edit your list preferences, or view the list archives, >> please visit: >>> http://list.valvesoftware.com/mailman/listinfo/hlds_linux >> _______________________________________________ >> To unsubscribe, edit your list preferences, or view the list archives, >> please visit: >> http://list.valvesoftware.com/mailman/listinfo/hlds_linux >> > > > _______________________________________________ To unsubscribe, edit your list preferences, or view the list archives, please visit: http://list.valvesoftware.com/mailman/listinfo/hlds_linux
