Re: Performance Problem
- To: mathgroup at smc.vnet.net
- Subject: [mg15381] Re: [mg15370] Performance Problem
- From: "Kevin J. McCann" <kevinmccann at Home.com>
- Date: Tue, 12 Jan 1999 03:14:44 -0500
- Sender: owner-wri-mathgroup at wolfram.com
Suspect that your problem is the graphics board. Which one and how much memory on it. When I upgraded my system, I went from 200 MHz to 450 MHz, but the graphics performance was a lot better than the ratio of clocks because I went from a 4 Mb board to an 8 Mb. Kevin -----Original Message----- From: Hermann Meier <hmeier at webshuttle.ch> To: mathgroup at smc.vnet.net Subject: [mg15381] [mg15370] Performance Problem > >A benchmark for Mathematica is available at >http://www.informatik.uni-frankfurt.de/~stst/mathsteph2.htm. I tried to >assess the performance of the following system: Dual-Pentium II 450 >MHz, ASUS P2B-D/P2B-DS AGP Mainboard, 512 kB Cache, 256 MB RAM, Windows >NT 4.0 Workstation / SP 3; Mathematica 3.0.1, latest MathKernel.exe - >file (appr. 50 kB) from >http://www.wolfram.com/support/systems/Windows/OutOfMemory.html My >computer had no other relevant workload. > >The benchmark site has (amongst others) results for a system with one >Pentium II 400 MHz. Apart from that, this system has the same >specifications, and the same version of Mathematica is running. > >Results for integer computations, floating point computations and >symbolic computations were not suprising: My system had a slight >performance edge. But when computing and rendering graphics, a severe >performance problem showed up. My system may be >completely out of order, but I cannot see why. > >It took my system no less than 34.7 sec (!!) to render the Koch >snowflake; the other system >finished in 13.8 sec. The results for the Klein bottle were less >pronounced: 19.7 sec on my computer, 15.9 sec on the other system. >Results for the last graphics benchmark (three pipes) were normal. > >I tried to look closer into the problem: - The special driver for my >graphics card was disabled (booting in VGA-mode): No effect. >- One CPU was disabled (/onecpu in boot.ini): Snowflake 34.7 sec, Klein >bottle 24.8 sec. >- $RecursionLimit was set to Infinity: No effect. - Page Faults/sec were >very high, but the maximum (8000) occured during the computation of >three pipes (that gave inconspicuous results). - Pages/sec (=disk >activity) was zero for Snowflake and very low (max < 30) for Klein >bottle; so nearly all page faults were "soft". - Cache Faults/sec were >lowest (Max <= 4) when rendering Snowflake. > >I am at my wit's end and would appreciate expert advice. - Thank you in >advance ! > > >Hermann Meier >hmeier at webshuttle.ch > > > > > >