Re: [Mesa3d-users] Regarding Performance in Mesa

[Karl S. <kar...@gm...>]

Are you using the Mesa windows (gdi) driver?  It is 100% software, so
performance will be slow.

Also, if you are on Windows, the standard timer is very low resolution.  If
I remember right, that timer has about a 16 ms period, which may explain the
values you are getting.  If you want higher resolution, then use the
multimedia timer, or time things that take longer.

On Tue, Aug 11, 2009 at 10:52 PM, vinit bansal <ban...@gm...>wrote:

> Hi Brian,
> Actually i wrote a wrapper for all opengl-es functions so that it'll call
> our gl fuction only.
> for ex for glorthox, internally in my wrapper i'll call glotho only.
> this way i m able to run my opengl-es program using MESA .. :D:D
>
> My aim is , I want to know how much time my WGL calls are taking.
> So i used clock function.
>
> here is my code:
>
> long start,end,time;
> start = clock();
> wglcreatecontext();
> end = clock();
> time = end-start;
> fprintf("print this time in file");
>
> same i did for wglmakecurrent/glreadpixels etc ...
> prob is , i am drawing a single frame again and again still i m getting
> every time diff value.
>
> please find my attach logs.
>
> for *glreadpixels:*
> *glreadpixels : 0.000000 mSec*
> *glreadpixels : 16.000000 mSec*
> *glreadpixels : 16.000000 mSec*
> *glreadpixels : 0.000000 mSec*
> *glreadpixels : 0.000000 mSec*
> *glreadpixels : 16.000000 mSec*
> *glreadpixels : 0.000000 mSec*
> *glreadpixels : 15.000000 mSec*
> *glreadpixels : 16.000000 mSec*
> *glreadpixels : 0.000000 mSec*
> *glreadpixels : 0.000000 mSec*
> *glreadpixels : 16.000000 mSec*
> *glreadpixels : 0.000000 mSec*
> *glreadpixels : 16.000000 mSec*
> *glreadpixels : 0.000000 mSec*
> *glreadpixels : 16.000000 mSec
> *
>
> for *wglCreateContext and wglMakeCurrent:*
> *wglCreateContext : 0.000000 mSec
> wglMakeCurrent : 16.000000 msec*
> **
> *wglCreateContext : 0.000000 mSec
> wglMakeCurrent : 16.000000 msec*
>
> *wglCreateContext : 0.000000 mSec
> wglMakeCurrent : 0.000000 msec*
> **
> I dont know why this time is different in each call?
> **
> *Best regards*
> *Vinit*
>
>
>
> On Tue, Aug 11, 2009 at 8:14 PM, Brian Paul <br...@vm...> wrote:
>
>> vinit bansal wrote:
>>
>>> Hi All,
>>> I tried some opengl 2.0 es example using MESA.
>>> I am able to render it properly but performance is not so good.
>>> Is there any flag i need to enable to use optimized performance from
>>> Mesa?
>>>  What is the meaning of performance data ?
>>> What all it should include?
>>>
>>
>> So you're using the opengl-es branch?  You're probably using the
>> "softpipe" gallium driver.
>>
>> What kind of GPU do you have?
>>
>> -Brian
>>
>>
>>
>
>
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