Anne Yust

low perf gain adding 2nd dual core processor

Discussion created by Anne Yust on Jan 22, 2008
Latest reply on Jan 23, 2008 by Charles Culp
We wanted to see if adding a second processor to a HP work station would substantially improve performance. We are using Anna Wood's model as a performance measure.

Here are the system specifics:

SW2007 sp 5.0
HP xw6400 workstation
Nvidia Quadro FX1500 graphics card
XPP 32 SP2
Intel Xeon 5130 2.0 GHz Wood crest
3GB RAM DDR2 667
5000x chipset
150 GB SATA 7200 rpm HDD
1333 fsb

We used Anna Woods model as the bench mark. We did the ctrl-Q to rebuild the model. With one processor it took 152.44 seconds.

We increased the memory from 2GB to 4Gb (yes 1 GB isn't being used), added a 2nd processor (same as the 1st) and rebuilt the same model. With a 2nd processor and more memory, the computer took 149.47 seconds. A mere 3 second improvement.

Checked the solidworks process to ensure the process took advantage of the 4 cores. It does.

During the rebuild the processors hit a peak usage of approximately 70%.

Why didn't we see a better improvement in performance?

A majority of the features took longer to rebuild, after the 2nd processor was added. Especially the #8-32 tapped hole. ONe processor= 25.77 seconds. Two processors = 29.36 seconds. Why?