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Russian
Journeyman III

What is ATI Stream Perfomance?

How much GFlops can i get?

Hi All!

 

I would like to ask people that have try to use ATI Stream (with CAL or without), about perfomance that they got. (in GFlops please)

I have try with CUDA (may be i was stupid that i did not try ATI first) , and i got maximum (real maximum)  25% of decleare perfomance in specs.

 

Now i am trying to understand, is it possible to reach 1000 GFlops decleared for Rxx or it is a fake (sory... :-)) like a CUDA?

I have red, that some people realy got 97%. I beleve.

I need to know:

Speed of one shader processor.

 Speed with access to L1 cashe,

Speed with access to L2 cashe,

Speed with access to  global memory.

 

If it is possible to attach some simple test application for VS2005(or 2008) , it will be simply perfect.

Thanks & regards,

Dmitry

 

PS. If some one give me example with 95% of decleared perfomance, i will be bigest fan of ATI and AMD!!!

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11 Replies
godsic
Journeyman III

What is ATI Stream Perfomance?

?? ????? ?? ????????, ? ?????? ???? ? ???? ?? ??????. ? ? ??????? ???????? ??? FLOAT_4 ? ????? ??? 95%.

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Russian
Journeyman III

What is ATI Stream Perfomance?

Originally posted by: godsic ?? ????? ?? ????????, ? ?????? ???? ? ???? ?? ??????. ? ? ??????? ???????? ??? FLOAT_4 ? ????? ??? 95%.

 

Some problems with fonts. I can not read. (pishi latinicey, forum ne ponimaet po russky :-))

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godsic
Journeyman III

What is ATI Stream Perfomance?

Teoreticheski, napisav shader v kotorom slazhyvausta dva FLOAT_4 i potom pishutsa v FLOAT_4 buffer dadut etu samuu proizvoditelnost, marketing. Struktura cachei ne pohozha na CPU. Oni menshe i organizovany po drugomu. CAL odnoznachno luchshe CUDA, no trebuet ot programmera ne tolko znanie C. Zhelatelno opyt s graph API - DX ili OpenGL. Elsi on est to vse  prosto i legko, hotya IL zadalbyvaet ochen. Vspominaetsa srazu rodnoi Pentagon-1024 .

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Russian
Journeyman III

What is ATI Stream Perfomance?

Eli tak, to voobsche zashibis`!!! 🙂

 

Opyta imenno s DX i OpenGL net, no est` ochen` bol`shoy opyt s raznimy DSPs, tak chto problem ne dolzhno byt`.

 

PS. Ya ochen` udivilsya kogda ubedilsya chto  CUDA - fake.

 

PS.PS. U tebya net sluchajno prosten`kogo proekta ka primera?

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godsic
Journeyman III

What is ATI Stream Perfomance?

K sozhaleniu seichas vse ne so mnoi. Mogu kinut v etu sredu s moim opytom optimizacii.

A tak mozhesh zaglyanut v /doc/Stream_programming_guide.pdf. Tam est razdel HelloCAL i tam prostenkoe prilozhenie s opisaniem chego i kak. Ya s nego i nachinal. Tam zhe lezhyt pdf s specifikaciaymi IL - sintaksis i komandy.

Et tozhe nado obyazatelno prochitat.

V otnoshenii API - ono tak sebe. So vremenem napishysh classy s oblegchennymi vyzovami pod konkretnuu zadachu.

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Russian
Journeyman III

What is ATI Stream Perfomance?

OK!

Spasibo! 🙂

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godsic
Journeyman III

What is ATI Stream Perfomance?

Ne za chto. Nashe delo pravoe!

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Russian
Journeyman III

What is ATI Stream Perfomance?

One more question.

Is it possible to save values from kernels to frame buffer directly? Or how to use a framebuffer in ATI Stream? Is it possible?

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gaurav_garg
Adept I

What is ATI Stream Perfomance?

You can try it with DX-interoperability exposed in ATI stream.

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