Messages in this thread | | | Date | Thu, 24 Oct 2002 23:16:08 +0200 | From | Willy TARREAU <> | Subject | Re: [CFT] faster athlon/duron memory copy implementation |
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On Thu, Oct 24, 2002 at 10:51:26PM +0200, Dieter N?tzel wrote: > copy_page by 'even_faster' took 5616 cycles (1112.9 MB/s)
something bothers me here : with PC2100 RAM, you copy 1113 MB/s, that is 1113 MB in + 1113 MB out !
I tried your code and code somewhat same results (dual xp1800+, pc2100, 760MPX). but I pasted the no_prefetch_copy_page() function into it and now it says that I copy 1455 MB/s ! I didn't look deep through the code, but I suspect that there's some static work that is not accounted, or a subtract between two counters, or something like that.
Cheers, Willy
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