[PD] [Gem] performance issues on ubuntu (no hardware accel?)

[cyrille henry]

Roman Haefeli a écrit :
...
> it still think, that i have 'good' acceleration. for example i can run
> opengl based games like armagetron in fullscreen mode without any
> performance problems. also does xscreensaver run without using much cpu
> in fullscreen mode. i tried once to build something with a similar
> number of polygons like one of the screensaver animations in gem, but at
> least when i switch to fullscreen mode, my cpu goes to 100% and the
> framerate dramatically drops down to 5 frames per second or slower.
> because of this behaviour, i believe that gem is the only opengl based
> software on my computer, that does *not* use hardware acceleration,
> whereas it seems that other programs do. unfortunately i still don't
> know a reliable way to make sure, whether gem uses hardware acceleration
> or not,  besides comparing its performance with other software.
ok.


anyway,
on my computer, when i create a gem window, i'v got this on the pd log :


Direct Rendering enabled!
GEM: Start rendering

so, this tell you that you do (or do not) have direct rendering with Gem.

> 
> my problem in other words:
> how can i make sure at compile time, that gem is compiled so, that it
> uses hardware acceleration afterwards?

> 
> and i am still hoping to hear some succes stories....

well, there is no reason that gem did not work.
i used fglrx with warty and hoary (it was a ati radeon mobility 9000 i think). now, i use nvidia card...


your ./configure output look ok for me.
can you double check that you have all fglrx-dev package etc...

sorry, can't help more

cyrille



> 
> roman
> 
> 
> 
> 
>> well, i hope it help,
>> cyrille
>>
>>
>> Roman Haefeli a écrit :
>>> hi all
>>>
>>> i am trying to use gem, since i changed to ubuntu. i used gem before
>>> successfully on windows on the same computer. but since i started
>>> compiling gem myself on ubuntu dapper, i am not convinced by its
>>> performance and i strongly believe that i am doing something wrong, or
>>> anything on my computer is not optimized etc.
>>>
>>> specs:
>>> Pentium M 1.7GHz
>>> Ati Radeon Mobility 9600
>>> Ubuntu Dapper
>>> Xorg 7.0.0
>>> xorg-driver-fglrx 
>>> gem from cvs (checked out today)
>>> the output of './configure':
>>> http://romanhaefeli.net/gem_configure.txt
>>>
>>>
>>> why am i  thinking that gem is not working well on my computer?
>>>
>>> the screensaver also does opengl stuff, that seems to be quite
>>> complicated in my eyes and it does eat only a little of the cpu-power,
>>> when running. also running the same gem-patches on windows seems to be
>>> not only 2x-3x faster, but maybe 30-50 times. running fgl_glxgears gives
>>> me values between 440 and 450 frames per second, which makes me assume,
>>> that hardware accelerated opengl works on my computer.
>> you should have 10 time more with this card.
>>
>>> so i suspect gem
>>> no to use any hardware acceleration at all and i wonder why. is there a
>>> way to check, if gem uses hardware acceleration? if yes and if my gem is
>>> _not_ using hardware acceleration, what do i need to do in order to make
>>> gem use of it?
>>>
>>>
>>>
>>> many thanks in advance
>>>
>>> roman
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> 		
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