Messages in this thread | | | Date | Tue, 17 Nov 1998 12:57:28 -0500 (EST) | From | "Richard B. Johnson" <> | Subject | Re: The Kommunity vs. Dick Johnson |
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On Tue, 17 Nov 1998, Erik Corry wrote:
> Hi Richard, > > I think your test procedure is flawed. I upped the > SIZE parameter in the makefile to 63kbytes in order > to simulate the situtation where the network buffer is > not already in the 1st level cache, which I am guessing > is the typical case. Your routines did very badly, ie > they were twice as slow as any of the other versions. > This is on a dual PPro 180 with 256kbytes 2nd level cache > per processor. It has separate 8k I and D caches for the > 1st level. I compiled with -O2. > > -- > Erik Corry erik@arbat.com Ceterum censeo, Microsoftem esse delendam! >
What does this have to do with the real world when the typical MTU is 1500 bytes??
Further, with -O6 -funroll-loops, the comparison is still:
Counting C loops for 3 seconds Counting ASM loops for 3 seconds C routine : 3388 AS routine : 6471 Change : 1.91 times faster AS clocks : 76035 clocks/byte : 1.24 C clocks : 145993 clocks/byte : 2.38
Cheers, Dick Johnson ***** FILE SYSTEM WAS MODIFIED ***** Penguin : Linux version 2.1.127 on an i586 machine (66.15 BogoMips). Warning : It's hard to remain at the trailing edge of technology.
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