From: Rik van Riel <riel@conectiva.com.br>
Date: Tue, 20 Nov 2001 22:19:26 -0200 (BRST)
On Tue, 20 Nov 2001, David S. Miller wrote:
> The Apache folks were keeping it mapped across requests,
> so even if it was "primed" (ie. pre-faulted), a read() into
> a static buffer was still significantly faster.
Interesting. I wonder how read() and mmap() compare when the
data is in highmem pages and we're facing a kmap()/kunmap()
for read() ...
Probably, the performance drops for read() to be equivalent,
or slightly below, mmap() peformance. That would be my guess.
Franks a lot,
David S. Miller
davem@redhat.com
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This archive was generated by hypermail 2b29 : Fri Nov 23 2001 - 21:00:25 EST