i believe dan did some work on optimizing the timers. maybe he can give some insight...
--mic On Fri, Dec 3, 2010 at 5:35 PM, Justin Clark-Casey <[email protected] > wrote: > I'm not familiar with the this area of the code but I had a quick look > since I was curious (the meat is in > OpenSim/Region/ScriptEngine/Shared/Api/Plugins/Timer.cs). The code isn't > using C# timers so I'm not totally surprised at the behaviour that you're > seeing. > > I suspect addressing this would require a considerably different > implementation. > > > On 03/12/10 17:18, Jorge Lima wrote: > >> Ran 100 timer events with a single if(++i> 100) inside. I suppose >> decrementing and comparing to 0 might be faster, but I also >> copy-pasted 100 inlined if clauses and the time to run them was >> negligible. >> >> llSetTimerEvent(0.1) -> 59 s -> 490% overhead >> llSetTimerEvent(0.2) -> 59 s -> 195% overhead >> llSetTimerEvent(0.5) -> 59 s -> 18% overhead >> llSetTimerEvent(0.75) -> 81 s -> 8% overhead >> llSetTimerEvent(1.0) -> 108 s -> 8% overhead >> llSetTimerEvent(2.0) -> 209 s -> 4.5% overhead >> llSetTimerEvent(4.0) -> 407 s -> 1.75% overhead >> >> I am guessing that the overhead is, therefore, internal to the timer >> implementation. I haven't tested raw C# timers as comparison but 100ms >> is an eternity in modern computing, I can ping servers across the >> Atlantic ocean in less than that! >> >> I went through the code but I haven't yet found the part that handles >> timers. It's not in EventManager. >> Does anyone know what's going on? The code works fine in SL. >> Should I be posting this in the dev list? I'd like to see if I can fix it. >> Any thoughts on how to get fast timers in OpenSim? >> Faster computer? (I did check and was only getting about 20% CPU usage...) >> Porting them to a Real-Time operating system? :) >> _______________________________________________ >> Opensim-users mailing list >> [email protected] >> https://lists.berlios.de/mailman/listinfo/opensim-users >> >> > > -- > Justin Clark-Casey (justincc) > http://justincc.org > http://twitter.com/justincc > > _______________________________________________ > Opensim-users mailing list > [email protected] > https://lists.berlios.de/mailman/listinfo/opensim-users >
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