Ok, here's my question then. I have an old single core AMD Athlon XP processor (1700+). Should I disable acpi and/or apic? As I said, some time ago I noticed a drastic increase in the processor load for my servers, will disabling one or the other, or both, of those improve that situation?
Just to clarify what I am talking about. When I was running a Windows XP server the hlds process load was typically under 10% at 100 fps. Now at appr. 200 fps the process load can be as high as 80% for Natural Selection. Drek Matthias Bleile wrote: > 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
