On Tue, Jul 6, 2010 at 5:12 AM, Csaba Halász <csaba.hal...@gmail.com> wrote: > On Tue, Jul 6, 2010 at 1:45 PM, <fiers...@zonnet.nl> wrote: >> Many modern computers are running multicore CPU's. I have noticed that >> FGFS only uses one thread in one core. And FGFS appears to be processor >> bound on my Core-I7, because the one core thread is 100% busy while my >> FPS are dropping in areas with a lot of scenery details (like Paris, for >> instance) and lots of rendering goodies switched on. > > I find it hard to believe that you have performance problems with a > core i7, assuming you got a halfway decent graphics card to go with > it.
Most of the _non-minimal rendering options use considerable CPU power on any GPU that is routinely available in a mobile form factor. If we want to be able to support non-desktop users (as well as simplify demonstrations at trade shows), we need to make sure that the main thread (and in fact that whole core) are entirely dedicated to rendering. > FG itself isn't CPU limited, we barely use any processing power :) As > such, parallelizing FG subsystems, while a good thing in theory and > certainly for the future, wouldn't help much in your case. The reason why FG itself doesn't use any CPU power is that, whenever any of the subsystem developers tries to implement an underlying simulation improvement that requires non-trivial amounts of CPU, there is massive complaint from the eye candy side of the community. This appears as a tradeoff precisely because FG doesn't support multithreading. If we had threading working safely, any simulation subsystem could choose to run in its own thread and eat an entire core as needed. The single threaded limitation currently impacts the implementation of real time weather, microcell airmass, AI operations, non-steam instruments, as well as radio navigation realism. That I'm aware of ... there are presumably others too. ------------------------------------------------------------------------------ This SF.net email is sponsored by Sprint What will you do first with EVO, the first 4G phone? Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
