Linux srcds has used a ton of CPU forever. The main frame loop is optimized for a windows 66hz timer environment. Hence, linux servers are 'perma-boosted' and chug inordinate amounts of CPU for minor FPS increases, and they give us no variables to tweak the various sleep times/calculations that impact this. SSE2 is still broken in linux srcds. it also uses gettimeofday heavily, which was bad enough that the l4d team specifically redid that part of the engine. The engine uses 2-3% of the CPU entirely idle on kernels with a high response rate (HPET/1000hz/other common things), which caused the l4d team to put in a hibernation mode.
The x86 binaries still use -fPIC On other arches (amd64) it don't have any performance advantage due to the necessary calls being there, but on x86 PIC clobbers a register and causes call heavy binaries like srcds to use upwards of 6% of their CPU time on thunks. Nvidia's linux OpenGL library, mpeg decoders, etc, all use non-fPIC shared objects on x86. And yeah, SourceTV murders my server in CPU usage. I also noticed FPS dips to the point where I had to fuck with the sleep timer to make things go smoothly. I made a few threads about this but valve isn't really all that interested. - Neph On Tue, Dec 30, 2008 at 2:10 AM, bob dolet <[email protected]> wrote: > Whenever sourcetv is enabled on a tf2 srcds instance extreme server side fps > dips occur. This happens regardless of fps settings in the server.cfg and > with as little as 0 players on the server. Running the 2.6.26.6 kernel with > RT patch on debian lenny and setting the srcds process to realtime priority > fps remain extremely stable without sourcetv enabled. This issue seems to > have a noticeable impact on gameplay. > _______________________________________________ > 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
