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Tristan23
Journeyman III

Does AMD give a damn about its users?

Now we have 5 (five!) Catalyst versions (11.5 -11.9) with this bad 100% CPU load bug. It was not there in 11.4.

Does AMD not care about it's customers?

This bug affects ALL of us!

I am seriously pi**ed!!

 

 

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22 Replies
genaganna
Journeyman III

Does AMD give a damn about its users?

Originally posted by: Tristan23 Now we have 5 (five!) Catalyst versions (11.5 -11.9) with this bad 100% CPU load bug. It was not there in 11.4.

Does AMD not care about it's customers?

This bug affects ALL of us!

I am seriously pi**ed!! 

In 11.9,  It is fixed for windows and Linux fix will be available in future releases.

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Raistmer
Adept II

Does AMD give a damn about its users?

genaganna, did you read my report?
It "fixed" at the cost of unacceptable poor performance. In fact, Cat 11.9 just as unusable in high-performance computations as 11.8. For my own GPU (HD6950) I see degradation on all Catalyst drivers after 11.2 ! It's much more than just 5 releases....
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maximmoroz
Journeyman III

Does AMD give a damn about its users?

I don't experience any performance degradation with 11.9 (in comparison with 11.8). CPU Load  is about 15% for 4-core CPU.

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Raistmer
Adept II

Does AMD give a damn about its users?

Originally posted by: maximmoroz

I don't experience any performance degradation with 11.9 (in comparison with 11.8). CPU Load  is about 15% for 4-core CPU.



Do you use CPU for computations while GPU working or only to feed GPU?
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maximmoroz
Journeyman III

Does AMD give a damn about its users?

No, CPU is used only for feeding data to the GPU (data copying is overlapped with kernels running).

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genaganna
Journeyman III

Does AMD give a damn about its users?

Originally posted by: Raistmer genaganna, did you read my report? It "fixed" at the cost of unacceptable poor performance. In fact, Cat 11.9 just as unusable in high-performance computations as 11.8. For my own GPU (HD6950) I see degradation on all Catalyst drivers after 11.2 ! It's much more than just 5 releases....


Could you please give a test case to reproduce this performance difference?

Are you using SDK2.5 for both drivers(11.9 and 11.2)?

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Raistmer
Adept II

Does AMD give a damn about its users?

Originally posted by: maximmoroz

No, CPU is used only for feeding data to the GPU (data copying is overlapped with kernels running).



There is no elapsed time increase under such conditions in my case too.
Only when CPU is busy (even with idle-priority tasks!).
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Raistmer
Adept II

Does AMD give a damn about its users?

Originally posted by: genaganna

Originally posted by: Raistmer genaganna, did you read my report? It "fixed" at the cost of unacceptable poor performance. In fact, Cat 11.9 just as unusable in high-performance computations as 11.8. For my own GPU (HD6950) I see degradation on all Catalyst drivers after 11.2 ! It's much more than just 5 releases....





Could you please give a test case to reproduce this performance difference?




Are you using SDK2.5 for both drivers(11.9 and 11.2)?



I can provide benchmark, but to see that difference you need to busy CPU with some tasks too. Those tasks can be idle priority ones (so, driver/runtime "should" get all CPU it needs...).

App was compiled on another host (actually it's netbook w/o compatible GPU at all. APP SDK 2.5 was used at compile time). CL file provided in text form, no precompiled kernels.
Thn app's exe + cl file used on another host under Vista x86 + Cat11.2 and Win7x64 Cat 11.9 Guru3D.
So, all app kernels were recompiled under corresponding Catalyst drivers.
And pp executable was linked against APP SDK 2.5 (in both cases).
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genaganna
Journeyman III

Does AMD give a damn about its users?

Originally posted by: Raistmer
Originally posted by: genaganna
Originally posted by: Raistmer genaganna, did you read my report? It "fixed" at the cost of unacceptable poor performance. In fact, Cat 11.9 just as unusable in high-performance computations as 11.8. For my own GPU (HD6950) I see degradation on all Catalyst drivers after 11.2 ! It's much more than just 5 releases....


Could you please give a test case to reproduce this performance difference?

Are you using SDK2.5 for both drivers(11.9 and 11.2)?

I can provide benchmark, but to see that difference you need to busy CPU with some tasks too. Those tasks can be idle priority ones (so, driver/runtime "should" get all CPU it needs...). App was compiled on another host (actually it's netbook w/o compatible GPU at all. APP SDK 2.5 was used at compile time). CL file provided in text form, no precompiled kernels. Thn app's exe + cl file used on another host under Vista x86 + Cat11.2 and Win7x64 Cat 11.9 Guru3D. So, all app kernels were recompiled under corresponding Catalyst drivers. And pp executable was linked against APP SDK 2.5 (in both cases).


Please give us benchmark.

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