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Hyperthreading and Autocad 2004

Printed From: CAD Forum
Category: EN
Forum Name: AutoCAD
Forum Description: Discussion about AutoCAD and AutoCAD LT, viewers, DWG and DWF formats, Design Review, AutoCAD 360, add-ons
URL: https://www.cadforum.cz/forum_en/forum_posts.asp?TID=328
Printed Date: 31.May.2026 at 18:10


Topic: Hyperthreading and Autocad 2004
Posted By: nautic
Subject: Hyperthreading and Autocad 2004
Date Posted: 12.Dec.2007 at 09:45
Hello,
 
I have a Intel P4 3,0 GHz with Hyperthreading.
We have a big cad file (50 MB) My System have 1 GB of RAM.
I Start Acad. After opening file, I have 200 MB free memory.
The value of Variable WHIPTHREAD is 3.
Now when I switch to layout 1 it remains 2:35 min.
I set the variable WHIPTHREAD to 0 (zero) an close acad complete.
Then I started acad again, opening the same file and switch to the same layout 1. But this take 2:32 min.
Why is it not faster, on whipthread=3?
 
thanks
 
Nautic


Replies:
Posted By: Vladimir Michl
Date Posted: 12.Dec.2007 at 11:25
The results may also depend on your graphics card, other Windows processes and activities, cache, etc. Please note that WHIPTHREAD controls only display operations, not other functions which may be performed by AutoCAD on layout switching (like 3D transformations, xrefs, fonts, clipping, reactors, undo files...).

-------------
Vladimir Michl (moderator)
ARKANCE - https://arkance.world" rel="nofollow - https://arkance.world - Autodesk Platinum Partner

Posted By: nautic
Date Posted: 12.Dec.2007 at 13:10
Thanks for your replay.

I have also checked my taskmanager and see, that acad works around by only 50% of CPU. (with wipthread 0 and 3)

My file is a standard 2D drawing, without xrefs.

I have a ATI 9800 Pro graphics card with 512 MB of RAM. Okay, I know, its not a CAD - card, but I think, the graphics card is fast enough. Zoom an PAN going good.

What is your experience? What is the load of your CPU?
What for a acad-Version do you have?


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