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alexbuell
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PostPosted: Sat Dec 23, 2006 9:05 pm    Post subject: glxgears jerky? Reply with quote

Hmm, I just run glxgears and to say the least, its animation is vey jerky, sometimes stops altogether for a while. The fps are quite respectable; averaging 40-60.

Any ideas why? Box is a dual 300MHz box w/2GB of RAM!
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NeddySeagoon
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PostPosted: Sat Dec 23, 2006 10:07 pm    Post subject: Reply with quote

alexbuell,

Dual 300MHz box ?
40-60 FPS is a tad on the slow side, I get 5000 FPS.

You are probably looking at beats between the image being updated and displayed - a bit like movement stopped or slowed by a strobeoscpe.

What CPUs and graphics card ?
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alexbuell
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PostPosted: Sun Dec 24, 2006 9:40 am    Post subject: Reply with quote

NeddySeagoon wrote:
alexbuell,

Dual 300MHz box ?
40-60 FPS is a tad on the slow side, I get 5000 FPS.

You are probably looking at beats between the image being updated and displayed - a bit like movement stopped or slowed by a strobeoscpe.

What CPUs and graphics card ?


CPUs are dual Blackbirds; here's the proc/cpuinfo:
Code:

bigbastard ~ # cat /proc/cpuinfo
cpu      : TI UltraSparc II  (BlackBird)
fpu      : UltraSparc II integrated FPU
prom      : OBP 3.25.0 1999/12/03 11:35
type      : sun4u
ncpus probed   : 2
ncpus active   : 2
D$ parity tl1   : 0
I$ parity tl1   : 0
Cpu0Bogo   : 592.38
Cpu0ClkTck   : 0000000011a48d8c
Cpu1Bogo   : 592.04
Cpu1ClkTck   : 0000000011a48d8c
MMU Type   : Spitfire
State:
CPU0:      online
CPU1:      online


I'm currently using a Creator3D series 1 UPA card in an Enterprise Ultra 2 box.
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NeddySeagoon
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PostPosted: Sun Dec 24, 2006 1:16 pm    Post subject: Reply with quote

alexbuell,

Oops - I missed the forum name when I replied my 5000 FPS is for a hardware accelerated x86 box.
Sorry about that.

You onlu have software OpenGL.
I suspect that your glxgears is not pausing. You can prove this by changing the sixe of the glxgears window. As you make it bigger, the update rate will drop because there are more pixels to draw.

Change the size so that the update rate is not a multiple (or sub multiple) of the screen vertical refresh rate.
You should observe that the apparent pauses change too.
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Ferris
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PostPosted: Tue Jan 02, 2007 1:53 pm    Post subject: Reply with quote

alexbuell wrote:
NeddySeagoon wrote:
alexbuell,

Dual 300MHz box ?
40-60 FPS is a tad on the slow side, I get 5000 FPS.

You are probably looking at beats between the image being updated and displayed - a bit like movement stopped or slowed by a strobeoscpe.

What CPUs and graphics card ?




I'm currently using a Creator3D series 1 UPA card in an Enterprise Ultra 2 box.


For whatever reason, for some time now, glxgears updates the display much more slowly than it used to. Hence, it is jerky on a Creator-based system, because any Creator has to use mesa-indirect (DRI is supported neither in kernels-2.6.x nor in X (sunffb driver). Now, on a U2(2x400) system with Creator 3d-Series 3 (ffb2+(H)) I see a bit over 130 FPS, and if you upgraded from ffb1(H) to ffb2+(H), you should see on the order of 100 FPS. If you actually GLX (mesa) in your applications, you might consider that upgrade. You should be able to find an ffb2+(H) on, say, eBay at a cost of pretty much free-for-shipping. Just take care to make sure you get the Horizontal model, not the Vertical model --- You can find model numbers here: http://sunsolve.sun.com/handbook_pub/Systems/U2/components.html (ffb2+(H) seems to be 501-4790.)

Hope this helps,
Regards,
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