CPU Usage (again)

[Prosperent]

We recently upgraded our cluster to centos 6, and seem to be having cpu usage problems with imagemagick once again. I have edited the policy.xml and changed threads to 1. I verified with convert -list resource that "Thread" is showing 1, yet each convert process is taking up to 900% of our cpu, or 9 of our 12 cpu cores. Even tried export MAGICK_THREAD_LIMIT=1, no change. Any other suggestions?

[magick]

Curious. We cannot reproduce the problem:

• -> time convert logo.png -negate null:
  3.981u 0.700s 0:04.12 599.0% 0+0k 0+0io 0pf+0w
  ->export MAGICK_THREAD_LIMIT=1
  -> time convert logo.png -negate null:
  7.078u 0.633s 0:9.03 97.6% 0+0k 0+0io 0pf+0w

A sure way to ensure only 1 thread is to build ImageMagick from source and disable OpenMP with the -disable-openmp configure script command line.

[Prosperent]

Thank you for the fast reply. I'll give that a try ad report back. I'm just using the default yum binaries currently.