Slow system... where to begin..

[dognose]

So, I set up a new computer, same specs as an old one, but it's lagging a lot. I ran a few benchmarks, and you can see here:

system 1# time convert rose: -resize 5000x5000 -bench 5 /tmp/rose.png
Performance: 5i 0.221729ips 26.050u 0:22.549

real 0m22.554s
user 0m25.795s
sys 0m0.262s

system 2#time convert rose: -resize 5000x5000 -bench 5 /tmp/rose.png
Performance: 5i 0.220167ips 28.710u 0:22.710

real 0m22.731s
user 0m25.553s
sys 0m3.172s

While the overall time is about the same.. The sys time (time spent in kernel) is over 10 times as long.

I believe this may have something to do with the sluggishness.. so, I'm wondering if any of you had advise on where to begin to figure this out.

[magick]

Verify the specs are the same. Type

• convert -list configure
  convert -list resource

and compare the results. Try a single threaded instance of ImageMagick:

• export MAGICK_THREAD_LIMIT=1

Verify with

• convert -list resource

Threads should be 1. Now type

• time convert rose: -resize 5000x5000 -bench 5 /tmp/rose.png

[dognose]

IM is exact same version.

thread limit doesn't seem to change sys time at all.

[dognose]

Wait.. the limit didn't take.

# export MAGICK_THREAD_LIMIT=1
# convert -list resource
File Area Memory Map Disk Thread Time
-------------------------------------------------------------------------------
768 8.1252GB 5.6754GiB 15.134GiB 18.446744EB 8 unlimited

# set | grep MAGIC
MAGICK_THREAD_LIMIT=1

[magick]

We're using tcsh and get the expected results:

Code: Select all

-> convert -list resource
File         Area       Memory          Map         Disk    Thread         Time
-------------------------------------------------------------------------------
48000      782.8MB    5.8323GiB    11.665GiB    unlimited         8    unlimited


-> setenv MAGICK_THREAD_LIMIT 1

-> convert -list resource
File         Area       Memory          Map         Disk    Thread         Time
-------------------------------------------------------------------------------
48000      782.8MB    5.8323GiB    11.665GiB    unlimited         1    unlimited

You can also set the thread limit from the command line:

Code: Select all

convert -limit thread 1 -list resource
File         Area       Memory          Map         Disk    Thread         Time
-------------------------------------------------------------------------------
48000      782.8MB    5.8323GiB    11.665GiB    unlimited         1    unlimited

We're using ImageMagick 6.6.7-6, the current release.