Re: xterm scrolling speed - scheduling weirdness in 2.6 ?!

[Willy Tarreau]

Hi Nick,

during a kernel compilation today while browsing the net on another
virtual screen, I noticed extremely long delays to redraw the screen.
My setup is the following :
 - kernel 2.6.1-rc1-mm1 + w29p2
 - X either reniced to -10 or 0 (doesnt make a difference)
 - window maker
 - opera open on a fairly simple page (marc.theaimsgroup.com) in VS 1
 - 2 xterms on VS2
 - 4 xterms in VS3, one of which runs make -j 3 bzImage, another one 'top'.

-> going from VS3 to VS2 then VS1 takes up to 5 or 6 seconds redrawing
   parts of windows on each screen. I also noticed that make -j 8 dep
   blocked the xterm it was run in for about a third of a second about
   twice a second. It does not seem to slow the process however since
   it takes the same amount of time as make -j 8 dep >/dev/null.


Cheers,
Willy

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