[ SOLVED ] Block sys_ticrate Command

[saintjimmygd]

I want to know if there is a posibility to block this command from our customers.We are running kernel-2.6.33.3-RT19 and we want to limit all of our HLDS-based servers on ~ 500 FPS.Also,we are running GCP.

[BehaartesEtwas]

add

Code:

+alias sys_ticrate disabled

to the command line (untested, but I have seen something like this to work)

[saintjimmygd]

It doesn't work , i can still type "amx_rcon sys_ticrate 1000" and get 1000 Fps
Also,found that valve blocked the "alias" command.
Of cuorse we can run a 300 Hz kernel but we also want to offer 1000 Fps servers ...

[saintjimmygd]

Hey,in linux kernel,is there a posibility to set different HZ values per CORE ? That would be great ! Somethig like
-CPU 1 -1000 Hz
-CPU 2 -300 Hz etc.

[BehaartesEtwas]

no that doesn't work. but you could try using this lib:
http://wiki.fragaholics.de/index.php/BEpingboost.c
to decrease (instead of increase) the maximum fps. the lib isn't designed for this but it might work. then you can choose different maximum fps per server.

[saintjimmygd]

isn't that only for srcds ? :|

[BehaartesEtwas]

it's designed for srcds, because hlds does not work properly with fps > 1000 (it will just run faster). but apart from this "minor" problem it works with hlds as well. what I have never tested is to use it to reduce the fps... just try it out.

[saintjimmygd]

Well,i found a solution.I recompiled the RT kernel just like in your tutorial but i set 300 Hz (not 1000).So now the sys_ticrate command has no (or little) effect.All that matters now is "-pingboost".With pingboost 3 in startup line we have 800-900 Fps and with pingboost2 300-400 Fps.But now i found another problem : the Fps is not quite stable

taskset -c 0 ./hlds_run -game cstrike -pingboost 3 +sys_ticrate 1500 ... gives me 900 fps with drops down to 400

[saintjimmygd]

By the way,what happens if i set

DISABLE High Resolution Timer Support

from your HOW-TO (http://wiki.fragaholics.de/index.php/EN:Linux_Kernel_Optimization) ?

[BehaartesEtwas]

try it out. in fact I believe that for some reason the high resolution timer is not used on your system. else you would get 1000 fps also with HZ=100 in the kernel.

did you try the lib?

[saintjimmygd]

BehaartesEtwas,i followed your tutorial on the latest 2.6.33.3 kernel with RT patch 19,but i disabled High Resolution Timer Suport.And voila ! Now,with -pingboost 3 we have 800-900 Fps (regardless of the sys_ticrate command) and with -pingboost 2 we have 400-500 Fps (also regardless of the sys_ticrate command).So i can say that this is the best solution so far for limiting server fps.