Messages in this thread | | | Subject | Re: [PATCH 1 of 3] Introduce __raw_memcpy_toio32 | From | Roland Dreier <> | Date | Wed, 11 Jan 2006 10:49:38 -0800 |
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Bryan> I'll take a look at whether the extra call/ret indirection Bryan> affects performance in a measurable fashion.
Your current implementation is out-of-line, right?
I would be surprised if calling a function has any overhead on x86_64, since the function call is a jump that can be predicted perfectly. The only issue is the code to shuffle values into the right registers.
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