On Wed, Nov 5, 2008 at 11:26 PM, Matthew Tippett <[EMAIL PROTECTED]> wrote: > > My two issues are > 1) It appears as if environment loading is added to 'draw' statistic.
Scenery loading is done in the pager thread, don't think that is counted into the draw time. > 2) There are blank periods in the graph that doesn't get attributed > to event, update, cull or draw.. Could be the time spent during synchronization, for example. I am not sure. > For 1), I am dreading the comment that the measure is from > flightgear's call into, and return from osg. Meaning that it is the > 'osg' draw that does some black voodoo that both a driver and > flightgear have no control over. Sorry :) It is in fact OSG internal statistics. Everything fg does counts into the event time I think. We don't really call into OSG, rather, OSG calls into FG! (apart from our auxiliary threads) > Some of you may be aware that I am tuning for multiple asics. What I > am seeing is there seems to be consistent render times of 6-10 ms per > card for the flight data I am replaying. The fg cull operation is > nicely parallelized (although I need to confirm timings), but the > draws, although parallelized, seem to take an O(n) time to complete > (meaning 4 GPUs results in 40 ms for each of the draws that take 10 ms > if done serially). We should carefully examine whether that is a result of the osg stats not being thread safe. It is a known fact that the *display* isn't, I don't know the status of the actual collection. -- Csaba/Jester ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
