[gmx-users] P4 vs P3 performance ? Special compilation options ?

David van der Spoel spoel at xray.bmc.uu.se
Tue Mar 26 19:47:20 CET 2002

On Tue, 26 Mar 2002, Marc Baaden wrote:

>I just did a quick but pertinent benchmark, comparing
>a single-processor job on a 1.266 GHz PIII versus the
>same job on a 1.7 GHz PIV (Xeon) .. and the Xeon is
>slower ! taking about 10% longer.
>Is this right (eg the effect of the increased pipeline
>length in the P4's) ? Or are there some special compilation
>options to get the Gromacs code on Xeons at high speed ?

Hm, how big is the system? Your P3 probably has a larger cache than the P4 

Groeten, David.
Dr. David van der Spoel, 	Biomedical center, Dept. of Biochemistry
Husargatan 3, Box 576,  	75123 Uppsala, Sweden
phone:	46 18 471 4205		fax: 46 18 511 755
spoel at xray.bmc.uu.se	spoel at gromacs.org   http://zorn.bmc.uu.se/~spoel

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