Original from  IVAN TODOROSKI  to DENIS TONN on 11-23-1998
Original Subject: PM drawing priorities...

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 IT>>   So, this poses several questions:
 IT>>
 IT>>    1) Why do PM operations run at a different priority than the calling
 IT>>       program?
 IT>>
 IT>>   As a final note, I tried this on a Win98 system at my friend's home,
 IT>>   and when you type DIR /S and move the window (or move other windows)
 IT>>   with full window draging, the listing of directories doesn't stop, and
 IT>>   behaves just as you would expect (slows down a little). It looks
 IT>>   rather nice when you move the window with directories scrolling by in
 IT>>   it.
 
  DT>  OS/2 doesn't artifically boost the video output at the expense of the
  DT> underlying application threads. Win95/98 (and NT Workstation) are
  DT> specificly "tuned" so video updates (user visable) will
preempt any
  DT> other operations. This makes it "look" faster to the typical user.
 
IT>   Well, it turns that OS/2 actually DOES boost the priority of video
IT>   output at the expense of other applications (see my previous
IT>   messages), and that's the reason why everything stops in the
IT>   background.

 No. Not video output. It is still based purely on the application 
priority (dynamicly adjusted or absolute). Since all the "drawing" you
are witnessing is through PM, it is a PM behaviour you are observing, 
not an artifact of "video boost". 
 
 You have too many interacting variables involved to be drawing the 
above conclusions. 


   Denis       

 All opinions are my very own, IBM has no claim upon them
. 
. 
.
 

 



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