On 24.03.2011 23:54, Robert wrote: > As you can see Nasal scripts aren't used at all. No, there are several generic Nasal scripts loaded independently of any aircraft configuration files. I checked my system and saw timers from the "mp_broadcast.nas" (which is also active when MP is disabled), wildfire.nas and several others. You also need to disable all scripts in "fgdata/Nasal" to get rid of all Nasal timers.
Also, I had a brief look at exactly which Nasal timers caused a jitter. And the winner is... ... well, any. Any Nasal timer, even if it's almost empty, will every now and then consume a much larger amount of time than normal. Seems to be a general issue with the Nasal execution engine: could be triggered by Nasal's garbage collector, which every now and then needs to do extra work - and runs within the context of a normal Nasal call. It could also be a result of Nasal's critical sections: other threads may acquire a temporary lock to alter Nasal data structures - which may block the execution of Nasal timers at certain points. Hmm... Best practices for debugging a multi-threaded program anyone? :) Concerning the frequency of the jitter: I guess it isn't related to the FDM at all. It's probably just a result of Nasal complexity. The more Nasal code is running, the more often/likely garbage collection / blocking may occur. Frame rate may also influce it: many Nasal timers run at delay 0 (in every update loop). cheers, Thorsten ------------------------------------------------------------------------------ Enable your software for Intel(R) Active Management Technology to meet the growing manageability and security demands of your customers. Businesses are taking advantage of Intel(R) vPro (TM) technology - will your software be a part of the solution? Download the Intel(R) Manageability Checker today! http://p.sf.net/sfu/intel-dev2devmar _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
