Re: X86_64 and X86_32 bit performance difference [Revisited]

[Andi Kleen]

Nauman Tahir <nauman.tahir@xxxxxxxxx> writes:

> I have posted this problem before. Now mailing again after testing as
> recommeded in previous replys.
> My configuration is:

Most likely it's related to you misusing the PCI DMA API in some way.
Review Documentation/DMA-mapping.txt closely.

If that doesn't turn on the light try oprofile.

-Andi
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