fps drop, possible solution but..

[krp]

hi all!
i always have fps drop
i tried ------ everything u could imagine -------
the only thing could make me stable, is the chrt!
but i have the problem
i run more than one server in one machine
when i chrt more than 2 hlds_i686 processes, all hlds_i686 goes to 99% cpu and nothing works, i have to kill all the hlds_i686.
when i run to -only one- the fps drops dissapear, but only works for this process.

anyone have a tip for this?

thanks

k

[BehaartesEtwas]

what cpu do you have? can you give the output of cat /proc/cpuinfo
maybe its just too much for your cpu, i don't know...
or maybe you need to run the servers with a lower priority value (instead of 98 and 99 in chrt try 1 and 2 or so. but of course keep it at SCHED_FIFO)
or try different versions of the kernels. which one did you try? (give the output of uname -a)

[krp]

i have an intel quad core q9650 3.0ghz fsb1333
i tried a lot of kernel versions, ck, rt, vanilla, and now, the normal gentoo-sources..

today i compiled the v2.6.29, and run with chrt -p 2 $PID and for now.. its working..

[BehaartesEtwas]

2.6.29 vanilla seems not the worst kernel indeed. currently I am trying to get 2.6.29-rt1 running, but I must have done something wrong (its crashing the whole system after 1-2 minutes). so far, 2.6.26.6-rt11 is the kernel that was working best for me (also an intel system).

[krp]

with all the kernels and configurations was the same for me, no thing changes to one to another..

[BehaartesEtwas]

have you tried already all the points in the trouble shooting section of my howto?

http://wiki.fragaholics.de/index.php/EN:Linux_Kernel_Optimization#Trouble_Shooting_.2F_FAQ

[krp]

yes, but not working!!

i dont understand why i chrt -p 2 $pid for more than one process they goes all to 99% cpu..

[BehaartesEtwas]

what chipset do you have? ICH7 or ICH8? if you don't know for sure please post the output of lspci

[krp]

ICH10, i have Intel DQ45CB Motherboards

[cookies911]

This is why i don't use linux

[BehaartesEtwas]

I have recently updated my howto, maybe this can help you...

cookies911 Wrote:This is why i don't use linux

as if windows would have stable fps...

[krp]

Nothing new for me, i tried everything you wrote..

any new idea? =(

[pengy]

Try the 2.6.28 vanilla kernel with chrt, 1000 hz, uncheck tickless, check hires timer, premption at low latency desktop, enable tracing for rcu, enable premptable rcu, thats what i have.

[krp]

how many servers do you run in one quad core?

[krp]

like i said before, with chrt i have a more stable fps, but i cant chrt more than 4 hlds_i686, because all of them, goes to 100% of cpu.. any trick to solve this?