Re: sse for fast_clear_page()?

From: Arjan van de Ven (
Date: Thu Feb 08 2001 - 12:37:53 EST

In article <> you wrote:
> fast_clear_page() uses mmx instructions for clearing a page, what about
> using sse instructions?
> sse instructions can store 128 bit in one instruction, mmx only 64 bit.

the sse FP registers might be lossy. On my athlon, the in-kernel mmx
functions are memory-bound (eg > 1 Gbyte/sec throughput)

Userspace program for the athlon code:

   Arjan van de Ven

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