http://www.imgtec.com/forum/ This is an XML content feed of; PowerVR Insider Forums : Last 10 Posts Copyright (c) 2006-2008 Web Wiz Forums - All Rights Reserved. Sat, 04 Feb 2012 07:30:27 +0000 Fri, 03 Feb 2012 18:08:41 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 9.08 30 www.imgtec.com/forum/RSS_topic_feed.asp http://www.imgtec.com/forum/forum_images/web_wiz_forums.png http://www.imgtec.com/forum/ http://www.imgtec.com/forum/forum_posts.asp?TID=1952&PID=5926#5926 Author: chototsu
Subject: compile error
Posted: 03 Feb 12 at 6:08pm

I try it.
Thanks.]]> Fri, 03 Feb 2012 18:08:41 +0000 http://www.imgtec.com/forum/forum_posts.asp?TID=1952&PID=5926#5926 http://www.imgtec.com/forum/forum_posts.asp?TID=1952&PID=5925#5925 Author: Arron
Subject: compile error
Posted: 03 Feb 12 at 6:01pm

You're welcome.

One thing I have noticed is that you seem to call glGetError a lot (317 times per frame). This should be disabled in release code as that number of calls may affect performance. ]]> Fri, 03 Feb 2012 18:01:17 +0000 http://www.imgtec.com/forum/forum_posts.asp?TID=1952&PID=5925#5925 http://www.imgtec.com/forum/forum_posts.asp?TID=1952&PID=5924#5924 Author: chototsu
Subject: compile error
Posted: 03 Feb 12 at 6:00pm

> I do not think that the issue is with the graphics hardware.
OK.
I investigate My app code.

Thank you for your kindness.
]]> Fri, 03 Feb 2012 18:00:22 +0000 http://www.imgtec.com/forum/forum_posts.asp?TID=1952&PID=5924#5924 http://www.imgtec.com/forum/forum_posts.asp?TID=1952&PID=5923#5923 Author: Arron
Subject: compile error
Posted: 03 Feb 12 at 5:45pm

Hi chototsu.
I'm not really sure. I've profiled your app with our internal tools and can see that the GPU does very little work, while the CPU is fully loaded. There's approximately a 200ms gap between a GPU calls.

The app runs well (40-50fps+) on a Galaxy Nexus which is also an SGX540 although clocked higher, so I do not think that the issue is with the graphics hardware.

Your other models vary with speed - some run around 17-20fps while as you say Megurine Luka runs very very slow.

I'll continue profiling your application next week and I'll update this post if I find any more information which may be of use.

Best regards.

Edited by Arron - Yesterday at 6:00pm]]> Fri, 03 Feb 2012 17:45:20 +0000 http://www.imgtec.com/forum/forum_posts.asp?TID=1952&PID=5923#5923 http://www.imgtec.com/forum/forum_posts.asp?TID=1952&PID=5922#5922 Author: chototsu
Subject: compile error
Posted: 03 Feb 12 at 5:18pm

Thank you for test.
> I assume this is because you have now enabled HW skinning?
Yes, 112beta3 uses GLSL skinning.
However, I head that old version(uses GLSL skinning) runs around 25 fps on Galaxy S from users.
My app runs around 40fps on TF101(Tegra2).
4-5fps is too slow...
I don't understand the cause.

> I believe I was using the Miku model, but I cannot find a way to switch models.
Please push menu button.
(Default model is Miku, you don't need to change model.)

Thanks.
]]> Fri, 03 Feb 2012 17:18:02 +0000 http://www.imgtec.com/forum/forum_posts.asp?TID=1952&PID=5922#5922 http://www.imgtec.com/forum/forum_posts.asp?TID=1952&PID=5921#5921 Author: Arron
Subject: compile error
Posted: 03 Feb 12 at 5:07pm

Hi chototsu,

I have downloaded your release app and can confirm that 112beta3 runs faster than the released version. I assume this is because you have now enabled HW skinning?

I believe I was using the Miku model, but I cannot find a way to switch models.

Regards.

Edited by Arron - Yesterday at 5:07pm]]> Fri, 03 Feb 2012 17:07:06 +0000 http://www.imgtec.com/forum/forum_posts.asp?TID=1952&PID=5921#5921 http://www.imgtec.com/forum/forum_posts.asp?TID=1952&PID=5920#5920 Author: chototsu
Subject: compile error
Posted: 03 Feb 12 at 4:45pm

Old version of my app runs around 25fps on Galaxy S.
It uses GLSL skinning.
It works fine.
However, I updated to new version, it didn't work on Galaxy S.
I didn't change my shader.
I am confused very much.
It runs around 25fps on Galaxy S if GLSL skinning works.

Thanks.]]> Fri, 03 Feb 2012 16:45:27 +0000 http://www.imgtec.com/forum/forum_posts.asp?TID=1952&PID=5920#5920 http://www.imgtec.com/forum/forum_posts.asp?TID=1952&PID=5919#5919 Author: chototsu
Subject: compile error
Posted: 03 Feb 12 at 4:36pm

Thank you for test my app.
> However, on our Galaxy S the application runs very, very slow
Which of release version or 112beta3 is faster?

On my test machine(ASUS TF101 Tegra2), it's same frame rate as release version.

(Don't select Megurine Luka models because it's too heavy for Galaxy S.
Please select Miku model.)

Thanks.]]> Fri, 03 Feb 2012 16:36:15 +0000 http://www.imgtec.com/forum/forum_posts.asp?TID=1952&PID=5919#5919 http://www.imgtec.com/forum/forum_posts.asp?TID=1952&PID=5918#5918 Author: Arron
Subject: compile error
Posted: 03 Feb 12 at 4:25pm

Hi chototsu,
This no longer fails to compile so that problem is solved :).

However, on our Galaxy S the application runs very, very slow - around 4-5fps. This appears to be due to very high CPU load.

Edited by Arron - Yesterday at 4:26pm]]> Fri, 03 Feb 2012 16:25:44 +0000 http://www.imgtec.com/forum/forum_posts.asp?TID=1952&PID=5918#5918 http://www.imgtec.com/forum/forum_posts.asp?TID=1948&PID=5917#5917 Author: marco
Subject: Shader performance: attribute vec3 vs vec4
Posted: 03 Feb 12 at 4:15pm

Hi,
there are small differences in the assembly code, hence the different cycle count estimates.
The vec3 example on the other hand uses less memory bandwidth as the w-component doesn't need to be transferred over the memory bus.

Regards,
Marco


]]> Fri, 03 Feb 2012 16:15:44 +0000 http://www.imgtec.com/forum/forum_posts.asp?TID=1948&PID=5917#5917