Ok, thanks for the clarification. Now to the question: how can we disable such kind of unwanted (in my case) behaviour? :/
Il 30/09/2012 22:33, Tony Paloma ha scritto: > We have some code that will attempt to set the priority of worker threads via > pthread_setschedparam. > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Marco Padovan > Sent: Saturday, September 29, 2012 10:38 AM > To: [email protected] > Subject: Re: [hlds_linux] srcds_linux changing its own process priority at > start (centos) > > :D > > btw I hope someone from Valve will clarify about this behaviour so at least > we can understand if making servers run as root "better but more expensive" > is an intender behaviour and if there's a way around that to suppress this > kind of "self changes tries" srcds_linux does :) > > > Il 29/09/2012 19:20, Andre Müller ha scritto: >> Next step: Run the srcds_linux in kernel mode: >> http://web.yl.is.s.u-tokyo.ac.jp/~tosh/kml/ >> >> 2012/9/29 Marco Padovan <[email protected]>: >>> you were right ... if you run it as root it make use of the realtime >>> scheduler and set itself to -3 as priority... >>> >>> is this normal? >>> >>> "ZOMG running az r00t makes it quicker and faster, 100000fps here I >>> come" :D >>> >>> Il 29/09/2012 19:03, Marco Padovan ha scritto: >>>> Hi, >>>> >>>> thanks for your feedback, never run the server as root so I never >>>> noticed this *weird* behaviour :S This specific unprivileged user >>>> (/*not root*/) I'm doing the tests with is allowed to set realtime >>>> scheduler for its own processes. >>>> >>>> Kernel is: 2.6.32-279.9.1.el6.x86_64 (official binary shipped by >>>> centos) >>>> >>>> What I can't understand is why srcds_linux tries to do such change >>>> on its own... If I wanted to see it make use of realtime scheduler I >>>> would do that when starting... I do not like processes doing things >>>> by their own :S >>>> >>>> Additionally this kind of behaviour would make people run the >>>> gameservers as root because it will magically performs "better" >>>> thanks to the automatic scheduler changes :O Are we opening a >>>> Pandora's box? :D >>>> >>>> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND >>>> 13660 testtf2 -3 0 288m 174m 19m S 9.6 1.5 0:10.58 srcds_linux >>>> 13653 testtf2 20 0 103m 1568 1224 S 0.0 0.0 0:00.00 srcds_run >>>> >>>> >>>> pid 13660's current scheduling policy: SCHED_RR pid 13660's current >>>> scheduling priority: 2 >>>> >>>> pid 13653's current scheduling policy: SCHED_OTHER pid 13653's >>>> current scheduling priority: 0 >>>> >>>> let me see what happens when running as root :) >>>> >>>> >>>> >>>> Il 29/09/2012 18:35, Ulrich Block ha scritto: >>>>> Am 29.09.2012 18:30, schrieb Marco Padovan: >>>>>> Hi, thanks for your reply. >>>>>> >>>>>> In my case it is not srcds_run doing that, it's srcds_linux that >>>>>> does something. >>>>>> >>>>>> "priority" changes a few seconds after srcds_linux has started >>>>>> (right after "create 4 threads" gets printed into the console log). >>>>>> >>>>>> In my case it's changing its own scheduling parameters moving from >>>>>> the SCHED_OTHER into SCHED_RR. >>>>> Which kernel are you using? And most importantly which user runs >>>>> the server? I saw such a behaviour when someone was running >>>>> everything with root. >>>>> >>>>> A normal system user should not have the permission to change the >>>>> prio or the scheduling. The root user does. >>>>> >>>>> >>>>> >>>>> _______________________________________________ >>>>> To unsubscribe, edit your list preferences, or view the list >>>>> archives, please visit: >>>>> https://list.valvesoftware.com/cgi-bin/mailman/listinfo/hlds_linux >>> _______________________________________________ >>> To unsubscribe, edit your list preferences, or view the list archives, >>> please visit: >>> https://list.valvesoftware.com/cgi-bin/mailman/listinfo/hlds_linux >> _______________________________________________ >> To unsubscribe, edit your list preferences, or view the list archives, >> please visit: >> https://list.valvesoftware.com/cgi-bin/mailman/listinfo/hlds_linux > _______________________________________________ > To unsubscribe, edit your list preferences, or view the list archives, please > visit: > https://list.valvesoftware.com/cgi-bin/mailman/listinfo/hlds_linux > > _______________________________________________ > To unsubscribe, edit your list preferences, or view the list archives, please > visit: > https://list.valvesoftware.com/cgi-bin/mailman/listinfo/hlds_linux _______________________________________________ To unsubscribe, edit your list preferences, or view the list archives, please visit: https://list.valvesoftware.com/cgi-bin/mailman/listinfo/hlds_linux
