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Low CPU usage

  • To: mathgroup at smc.vnet.net
  • Subject: [mg122177] Low CPU usage
  • From: Ben Gear <bjgear at googlemail.com>
  • Date: Tue, 18 Oct 2011 07:42:19 -0400 (EDT)
  • Delivered-to: l-mathgroup@mail-archive0.wolfram.com
  • Reply-to: comp.soft-sys.math.mathematica at googlegroups.com

All,

Frequently when Mathematica is trying to evaluate an expression the CPU usage on my machine seems remarkably low; one core will be ~70% with the others only up to ~20%.  I'd expect one core at least to be maxed out. The hard disk isn't being hammered, RAM usage doesn't increase, so my question is: where is the bottle neck? I'm new to Mathematica so is this normal behaviour? I'm using 64 bit Win 7.

On a related note some of my expressions just don't seem to ever return, particularly those involving Sum[] - again, is this normal?

My experience with Mathematica so far has mostly been frustrating.  I can get it to do dead simple things, but anything vaguely complex it seems to choke on. Just getting it to replicate what I can do by hand seems an uphill struggle. Do many use it professionally or is it mainly used in education?

Regards,

Ben



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