Author: Gregor Overney
Date: 12:58:35 01/24/01
Go up one level in this thread
> >Some info about the used alpha systems. > >21164 has 8kb L1 cache, >what do i need to say more? > >for diep a 633Mhz 21164 is as slow as a PII at 380Mhz. > >So that's a PIII at 300Mhz. > Just ran a few tests with my old 21164 that only has a clock rate of 566. I am using Linux with g++, which is by far not very optimized for the 21164. On NT, I am using VC++ 6. The test is a real-life thing (at least for me). It recursively determines the cluster size of huge molecules. Something that forces all CPU's to leave their cache and pick up data from slow RAM. So the 21164's larger L3 cache of 4MB does not really affect the performance too much. Gregor BTW: The system running at 850 is just a laptop with a 100 MHz memory bus. Nothing exciting. The system with the PIII/600 has 133 MHz memory bus. An RDRAM system is expected to be even faster. /* OS CPU/MHz Cache Compiler Options Time ------------------------------------------------------------------------------------------- WinNT 4.0 SP5 pII/300 32/512(150 MHz) VC++ 6.0 SP3 -Ox -Ob2 -G6 -Gr -GX 31 sec WinNT 4.0 SP6 pII/300 32/512(150 MHz) VC++ 6.0 SP4 -Ox -Ob2 -G6 -Gr -GX 31 sec WinNT 4.0 SP5 pII/300 32/512(150 MHz) VC++ 6.0 SP3 -Ox -G6 -GX 45 sec HP-UX 10.20 PA-8000/180 unknown HP aCC +Oall 72 sec Linux 2.0 21164/566 16/96/4MB g++ 2.7.3 -O5 22 sec WinNT 4.0 SP5 p6/200 16/256(200 MHz) VC++ 6.0 SP3 -Ox -Ob2 -G6 -Gr -GX 79 sec WinNT 4.0 SP5 p6/200 16/256(200 MHz) VC++ 6.0 SP3 -Ox -G6 -GX 45 sec WinNT 4.0 SP4 pIII/600 32/512(300 MHz) VC++ 6.0 SP3 -Ox -Ob2 -G6 -Gr -GX 15 sec Win2000 Pro SP1 pIII/850 32/256(850 MHz) VC++ 6.0 SP4 -Ox -Ob2 -G6 -Gr -GX 14 sec Win2000 Pro SP1 pIII/850 32/256(850 MHz) VC++ 6.0 SP4 -Ox -G6 -GX 18 sec Solaris 8 USPARC IIi 32/2MB(400 MHz) g++ 2.95.2 -O3 13 sec */
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