On Tue, 2009-06-23 at 11:04 +0200, cyrille henry wrote:
Roman Haefeli a écrit :
hi all
i'd like to drive two screens in fullscreen mode with puredata/gem and wonder, which is the best way to go performance-wise.
the setup, that i'm working with:
- ubuntu jaunty
- pd-extended-41.4
- nvidia geforce 9800gt with two heads (if i recall correctly, can't
check at the moment)
- two monitors with different resolutions (1280x768 and 1280x1024)
so far, i came up with having two separate X screens, so that i can tell [gemwin] with a 'create <screen-id>' message, on which screen to open. this requires two instances of pd/gem, of course.
i wonder now, if it makes a difference performance-wise, when having only one gem window, that spans both screens.
well, if you have a dual core computer, then 2 pd would help using your 2 core.
this patch is making excessive use of [pix_film], so the major part of the cpu processing is anyway splitted into several threads (is that correct)? at least, one of the pd instances is now consuming between 120-140% of the dual core machine, so it is somehow using more than one core.
if you have to display the same geometry on the 2 screen in a way that you can send less information in the GPU then, it could help to have only 1 windows.
both screens show completely different content in this piece.
anyway, best is to make benchmark...
yo.. that is what i am going to do.
however, when switching to 'twinview(tm)' mode, so that i have one big desktop spanning both screens, i still cannot make the gemwin bigger than the size of the screen, where it initially was displayed. is this because the do not have the same resolution?
did you try with border 0? otherwise, your gemwin is certainly resized by you windows manager.
exactly! thanks for that hint. i am going to do some more tests now, since it works also with one gemwin spanning both screens.
cheers and thanks for your toughts.
roman
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