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elavram
Adept I

Re: W8100 is slower in x64 executable - uses more VGPRs and SGPRs

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Hello Dipak,

Did you manage to reproduce the problematic behaviour I observed?

Many thanks!

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dipak
Staff
Staff

Re: W8100 is slower in x64 executable - uses more VGPRs and SGPRs

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I guess, the issue is also reproducible with a Hawaii XT card (note: W8100 is alos Hawaii based]. I'm still working on it. I've sent you an email regarding my findings till now. Please check your mailbox.

Regards,

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elavram
Adept I

Re: W8100 is slower in x64 executable - uses more VGPRs and SGPRs

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Dipak suggested that compiling the kernel in the x64 build using the -cl-std=CL20.0 option can reduce the number of registers used.

Many thanks Dipak!

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mz24cn
Adept II

Re: W8100 is slower in x64 executable - uses more VGPRs and SGPRs

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elavram, does the option accelerate your x86_64 program actually?

And why dipak, as an official member, not give such suggestion PUBLICLY?

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elavram
Adept I

Re: W8100 is slower in x64 executable - uses more VGPRs and SGPRs

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Hello mz24cn,

"elavram, does the option accelerate your x86_64 program actually?"

Yes, it does.

"And why dipak, as an official member, not give such suggestion PUBLICLY?"

It is redundant. I made a post with the suggestion, it is marked as Correct.

If you need more information about the problem I am sure that me and Dipak will answer if we know.

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