Hey, I was wondering if ACPI is really slowing down your system performance, I'm currently running FreeBSD 7.1, and I had only once a few problems with huge spikes, but also I never tried to assign the servers to a specific CPU core. PS: Using Q6600.
Regards, Herk. > Your point to the "Power Management" made me recognize bad evil "ACIP", > so > i added to my grub.conf: > > kernel /boot/kernel-2.6.25.8 root=/dev/sda3 apm=off acpi=off noapic > > and.... voilâ! > No more drops. > 4 cores with 100% 1000FPS. i can die in peace now. > > thanks gary and the others! > > ----- Original Message ----- > From: "Gary Stanley" <g...@velocity-servers.net> > To: "Half-Life dedicated Linux server mailing list" > <hlds_linux@list.valvesoftware.com>; "Half-Life dedicated Linux server > mailing list" <hlds_linux@list.valvesoftware.com> > Sent: Tuesday, January 20, 2009 11:46 PM > Subject: Re: [hlds_linux] different cpu-cores -> different performance > > >> At 05:41 PM 1/20/2009, Matthias Bleile wrote: >>>See here: >>>http://rafb.net/p/n7UeOP48.html >>> >>>They are no Players present, doesn't matter, the drops are equal with or >>>without players. >>>If a server is used the Usage of the assigned core rises up to 5-6%, no >>>differences here between the cores. >> >> Probably power management or scheduler latency. >> >> >>>----- Original Message ----- >>>From: "David A. Parker" <dpar...@utica.edu> >>>To: "Half-Life dedicated Linux server mailing list" >>><hlds_linux@list.valvesoftware.com> >>>Sent: Tuesday, January 20, 2009 11:25 PM >>>Subject: Re: [hlds_linux] different cpu-cores -> different performance >>> >>> >>> > The taskset commands look good. What is the usage on each CPU? htop >>> > is >>> > a good utility to see that kind of information quickly. Also try: >>> > >>> > mpstat -P ALL 1 1 >>> > >>> > This will give you the usage of all CPUs over a one-second interval. >>> > Adjust the first number to make it measure usage over a different >>> > interval (in seconds). Adjust the second number to make it repeat N >>> > times. >>> > >>> > - Dave >>> > >>> > Matthias Bleile wrote: >>> >> Wow, many answers ^^. >>> >> >>> >> So: >>> >> >>> >> --------------------------- >>> >> Could you post the taskset command lines you are using? >>> >> taskset -c 0 ./hlds_run..... >>> >> taskset -c 1 ./hlds_run..... >>> >> --------------------------- >>> >> --------------------------- >>> >> cat /proc/interrupts. Probably sharing interrupts. >>> >> See here: http://rafb.net/p/LN4JtN70.html >>> >> Only big differents is the "timer" interrupt only occuring on CPU0. >>> >> The "Rescheduling Interrupts" can't be it, it would mean CPU2 is in >>> >> perfect >>> >> health, but it isnt. >>> >> --------------------------- >>> >> --------------------------- >>> >> Turn off irqbalancing. It's useless and it doesn't do anything >>> >> but hurt gameserver hosting. >>> >> i can't even turn it on, if i wanted to, cause: >>> >> >>> >> Symbol: IRQBALANCE [=n] >>> >> Prompt: Enable kernel irq balancing >>> >> Depends on: X86_32 && SMP && X86_IO_APIC >>> >> >>> >> I dont use an 32Bit System. >>> >> --------------------------- >>> >> --------------------------- >>> >> Useless. It doesn't do what it used to, and >>> >> biiig performance differents between nice --0 and nice --20. >>> >> --------------------------- >>> >> --------------------------- >>> >> Kind of useless, but can be useful in specific situations >>> >> Big difference between no preemption and full preemption. >>> >> without preempt im not able to get it stable 1000fps even on core0 >>> >> --------------------------- >>> >> --------------------------- >>> >> Try running 2 servers on Core 0 and 2 and the rest on Core 1 and 3. >>> >> Does >>> >> that change anything for you? >>> >> same here. >>> >> core0 = stable 1000 >>> >> core1 = small spikes >>> >> core2 = big spikes >>> >> core3 = only spikes ;) >>> >> >>> >> Guess thats it for now ^^. >>> >> >>> >> >>> >> ----- Original Message ----- >>> >> From: "1nsane" <1nsane...@gmail.com> >>> >> To: "Half-Life dedicated Linux server mailing list" >>> >> <hlds_linux@list.valvesoftware.com> >>> >> Sent: Tuesday, January 20, 2009 10:51 PM >>> >> Subject: Re: [hlds_linux] different cpu-cores -> different >>> performance >>> >> >>> >> >>> >>> Try running 2 servers on Core 0 and 2 and the rest on Core 1 and 3. >>> >>> Does >>> >>> that change anything for you? >>> >>> >>> >>> On Tue, Jan 20, 2009 at 4:23 PM, Gary Stanley >>> >>> <g...@velocity-servers.net>wrote: >>> >>> >>> >>>> At 04:04 PM 1/20/2009, Matthias Bleile wrote: >>> >>>>> Hi everybody. >>> >>>>> >>> >>>>> So i wasted 1 week of free time and i still wasn't able to find >>> >>>>> out.. >>> >>>>> >>> >>>>> We got a Intel Quad Core and 4 hlds Servers. >>> >>>>> Each server is assigned to 1 CPU using taskset. >>> >>>>> >>> >>>>> >>> >>>>> The Server assigned to CPU0 gives excellent performance, as seen >>> >>>>> here: >>> >>>>> >>> >>>> >>> http://fpsmeter.fragaholics.de/?load=hlds.84.201.7.34.27030.1232478679.session >>> >>>>> The Server assigned to CPU1 gives a slightly worse performance as >>> >>>>> seen >>> >>>> here: >>> >>>> >>> http://fpsmeter.fragaholics.de/?load=hlds.84.201.7.34.27400.1232478412.session >>> >>>> >>> >>>> cat /proc/interrupts. Probably sharing interrupts. >>> >>>> >>> >>>>> The Server assigned to CPU2 gives MUCH worse performance as seen >>> >>>>> here: >>> >>>>> >>> >>>> >>> http://fpsmeter.fragaholics.de/index.php?load=hlds.84.201.7.34.27200.1232479691.session >>> >>>> >>> >>>> Same. Turn off irqbalancing. It's useless and it doesn't do >>> anything >>> >>>> but hurt gameserver hosting. >>> >>>> >>> >>>>> Got no picture of CPU3 but believe me, its worth crying. >>> >>>>> I tried everything i could imagine. >>> >>>>> >>> >>>>> - 32Bit OS, 64Bit OS >>> >>>>> - Debian, Gentoo >>> >>>>> - hlds_i686, hlds_i486 >>> >>>> i486 doesn't have XMM regs, nor does it have cmov (IIRC) >>> >>>> >>> >>>>> - not used nice, used nice --20 >>> >>>> Useless. It doesn't do what it used to, and >>> >>>> >>> >>>>> - Kernel with full preemption >>> >>>>> - Kernel without any preemption, pure processing power. >>> >>>> Kind of useless, but can be useful in specific situations >>> >>>> >>> >>>> >>> >>>>> - Turned off Multicore Scheduling, turned back on. >>> >>>> Adds overhead to the scheduler >>> >>>> >>> >>>>> - tried "tsc", "hpet" and "jiffies" as clocksource. >>> >>>> TSC is your best bet on intel, but HPET is overall the better >>> >>>> choice. >>> >>>> >>> >>>> >>> >>>>> If i use Core1+2 its as bad as i use Core3. >>> >>>>> If i use Core2+3 its more 500FPS than 1000FPS.... >>> >>>> You are probably running into power management issues, or SMI >>> >>>> interrupts causing pipeline stalls. Or you are just running into >>> >>>> know >>> >>>> CPU errata :-) >>> >>>> >>> >>>> >>> >>>> >>> >>>> _______________________________________________ >>> >>>> 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 >>> >> >>> > >>> > -- >>> > >>> > Dave Parker >>> > Utica College >>> > Integrated Information Technology Services >>> > (315) 792-3229 >>> > Registered Linux User #408177 >>> > >>> > _______________________________________________ >>> > 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 > _______________________________________________ To unsubscribe, edit your list preferences, or view the list archives, please visit: http://list.valvesoftware.com/mailman/listinfo/hlds_linux
