Lake, Dan wrote: > Justin, > I posted a new version of the SceneGraph dictionaries patch on the > ScienceSim wiki. It also includes a new dictionary for managing pending > updates to the scene. Previously, this was a linear search to determine if an > object needed to be updated, but now it's a dictionary lookup on UUID. With > this patch, CPU utilization for 2000 updating objects has been reduced from > ~150% to ~5%. It also allowed me to create 5x the qty of scripted updating > objects with timers using approximately the original 150% cpu. > > http://sciencesim.com/wiki/doku.php/opensim/performance_profiling#update_mar_19._2009 > > I think that someone more familiar with SceneGraph should take a look at > my patch before it's committed. I filed a Mantis entry with the patch. > > http://opensimulator.org/mantis/view.php?id=3312
Hi Dan. Many thanks for this. I've left you a comment on the mantis. > > > > Dan lake > Network Software Engineer > Network Technology Lab > Corporate Technology Group > 503.712.8318 > [email protected] > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Justin Clark-Casey > Sent: Wednesday, March 18, 2009 1:34 PM > To: [email protected] > Subject: Re: [Opensim-dev] Profiling complex scenes > > Lake, Dan wrote: >> Justin, >> I filed a Mantis entry for the timer_dictionary.patch. >> >> http://opensimulator.org/mantis/view.php?id=3311 >> > > Thanks very much Dan, committed as r8812. > > Regarding the localID SceneGraph dictionary, as you've seen in the comments > we've pretty much known that the lack of one > is pretty bad and your tests certainly confirm it. > > Even having one in not quite the right place would be better than not having > it at all. Certainly for myself (and most > probably for others), the priority of adding the other necessary bits to your > initial starter patch in order to resolve > this has been considerably bumped up. > >> ~Dan >> >> -----Original Message----- >> From: [email protected] >> [mailto:[email protected]] On Behalf Of Justin Clark-Casey >> Sent: Wednesday, March 18, 2009 8:29 AM >> To: [email protected] >> Subject: Re: [Opensim-dev] Profiling complex scenes >> >> Lake, Dan wrote: >>> I work at Intel for Mic Bowman. He mentioned a while back that we are >>> developing some workloads for understanding the scalability bottlenecks >>> in OpenSim. I recently created a test which generates 2000 scripted >>> objects which rotate and change color at random intervals. The workload >>> consumed multiple CPU cores with only a single client viewer connected >>> and the frame rate dropped to absolute zero with 10 clients connected. I >>> was then able to reduce the CPU utilization by >80% with a few added >>> lines of code in SceneGraph.cs and Timer.cs. If you are interested in a >>> complete analysis of this workload, please visit the OpenSim profiling >>> wiki page at >>> http://sciencesim.com/wiki/doku.php/opensim/performance_profiling. I >>> will continue to post interesting profiling results from our workloads >>> and ideas about scaling OpenSim based on those results. Your comments or >>> feedback are appreciated. >> Nice work, Dan, very useful stuff. >> >> Is the scenegraph_dictionary.patch code not already present in EntityManager >> (albeit possibly unused, I've not looked >> closely)? If not, would it be better incorporated into there and do you >> plan on extending the patch into a complete >> implementation (e.g. localID -> SOP mapping removal as well)? >> >> timer_dictionary.patch on the other hand looks like a complete >> implementation. Is this a patch that could usefully be >> applied in its current state? >> >>> >>> >>> >>> >>> >>> *Dan lake* >>> >>> Network Software Engineer >>> >>> Network Technology Lab >>> >>> Corporate Technology Group >>> >>> ( 503.712.8318 >>> >>> * [email protected] >>> >>> >>> >>> >>> >>> >>> ------------------------------------------------------------------------ >>> >>> _______________________________________________ >>> Opensim-dev mailing list >>> [email protected] >>> https://lists.berlios.de/mailman/listinfo/opensim-dev >> > > -- justincc Justin Clark-Casey http://justincc.wordpress.com _______________________________________________ Opensim-dev mailing list [email protected] https://lists.berlios.de/mailman/listinfo/opensim-dev
