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Improving Alegro Refresh Speed?

When running Alegro PCB editor the amount of time to refresh the screen and regenerate pours is very slow. Just to slide over a via or move a component with dynamic shapes enabled can take over 30 seconds to regenerate and refresh. I prefer not to disable the dynamic shapes as I sometimes am shoving vias or moving components in order to improve the copper pours and would like to see the results.

Typical boards I am working on will have 10-20 layers with 6-8 layers of flooded planes plus outer layers flooded with planes.

My system I am running Allegro on is a P4 3.2GHz with 504M RAM.

I believe I have onboard graphics on my motherboard.

What is the best way to speed up the Alegro performance?

Increase amount of RAM to_______?

or install a Video card with ______RAM?

Any thoughts?

Originally posted in cdnusers.org by Dom

archive over 17 years ago

Hi
In the Help Documentation list the minimum system requirements.
Help>Documentation>Release Info>Allegro Platform System requirements
Minimum System Ram is 1 Gb recommened is 2Gb. You have posted you have
512Kb

The Video requiremets are also listed.

Regards,
BillZ
EMA Design Automation

Originally posted in cdnusers.org by BillZ_EMA
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archive over 17 years ago

I've experienced similar problems with Allegro 15.7, and with as much memory I can install in my system (4GB, WXP recognizes 3.5GB of it). I found that somehow Allegro writing to a file somewhere and it just keeps on getting bigger, and causing things to slow down. I haven't yet tracked down the offending file (could be a journal or tmp file) but simply saving, exiting and restarting Allegro cures the problem. It's only after several hours that it gets this way for me, by the way.

Have any other users noticed this behavior?
Thanks
Andrew

Originally posted in cdnusers.org by annoonan
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archive over 17 years ago

Yes, I've noticed this too. I use the same cure. I always thought it was my machine.

Thanks,
Joe

Originally posted in cdnusers.org by JoeWi
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archive over 17 years ago

Hi
I would suggest reviewing your enviroment variables. Are you running across a network? Where are your log files written too?
Do you have them written to a specific directory? If your log files are written out on a network performance issues can be
experianced. Also do you have autosave set? How often does it save how many copies and where are the files written?
There are a lot of factors that can affect system performance. You can list and review your enviroment variables by goign to Setup>User Prefernces and selecting List All. YOu can print and review these settings. Also review where your home directory is located.
Regards,
BillZ
EMA Design Automation

Originally posted in cdnusers.org by BillZ_EMA
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