I tried setting up an AMD 1800+ on a Soyo Dragon Ultra and didn't see as much speed increase as I had hoped either. Turns out that I needed to set some non-default values (cpu clock multiplier if I remember right) in the bios setup to get it to run at the 1.56Ghz for the AMD. You might want to run the MS NT diag (it's a stand alone diskette created from the NT CDs) or other to see what it estimates the CPU speed to be. I assume the program isn't disk bound. (can't hurt to ask, right?) You might run the top program to make sure that there isn't another program hogging CPU. I would guess that if your program is computational bound, your not doing much with the kernel, so that wouldn't be my first place to look, but that's more guess than experience. You might try booting the new computer with Windows and see if it runs any better. It has been my experience that Linux runs about 20% faster than Windows, but that was done on a CPU bound application that's accessing a large cached DB (no disk i/o) in Oracle. Hope this helps a little. -----Original Message----- From: tclug-list-admin at mn-linux.org [mailto:tclug-list-admin at mn-linux.org]On Behalf Of Randy Clarksean Sent: Sunday, October 06, 2002 3:24 PM To: tclug Subject: [TCLUG] Kernel - AMD - Computational Speed? I just put together a new AMD XP 2100+ system and installed RedHat 7.2 The intent of this machine is heavy computational work (1.5 GB RAM, 80 GB HD, ABIT Motherboard with PC2100 RAM). I have an older Win2000 Machine, dual PIII 700 MHz 1 GB RAM - TYAN Motherboard that I have been using for computational work. I have data from an analysis run on the PIII system (1 CPU) and I just ran that same analysis on the new AMD21+ system. The speed improvement was NOT what I hoped for. PIII 700 MHz 96,360 seconds AMD XP 2100+ 65,040 seconds I do realize that there are operating system issues, etc. ... but with all of that I had anticipated a larger reduction in computational time. The code I am running is a commercial code that is developed to run on both operating systems, so I am fairly sure they work to get the best CPU time on both platforms. I was hoping for something on the order of 1/2 the CPU time - on large computational runs like this every little reduction in time helps. Not being a "kernel" expert by any means ... would it make any sense to recompile the kernel on my new platform, rather than relying on the kernel as loaded from the RH7.2 distribution CDs? Any suggestions would be greatly appreciated! Randy Clarksean, Ph.D., P.E. Leading Technology Designs, Inc. 106 North Boardman Ave. P.O. Box N New York Mills, MN 56567 "Excellence can be attained if you Care more than others think is wise, Risk more than others think is safe, Dream more than others think is practical, and Expect more than others think is possible." - Author Unknown ph: 218-385-3750 fax:218-385-3751 email: rclark at lakesplus.com -------------- next part -------------- An HTML attachment was scrubbed... URL: http://shadowknight.real-time.com/pipermail/tclug-list/attachments/20021006/29ce3220/attachment.html