"Sticky" mouse pointer on machine with high load

[Yuri]

Often when my machine has load is 2 or higher it becomes very visible 
that mouse motion isn't smooth. Mouse moves in a series of quite long jumps.
I believe this effect is especially pronounced when some applications 
read/write a lot of files.

My understanding is that this is because signal from mouse gets stuck in 
the fifo somewhere and not processed by x-server in time.

Is there any solution to this problem?

I never saw such problem on Windows though I didn't touch Windows PC for 
many years now.

Yuri