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Subject[PATCH *] scheduler bigpatch 2.1.131-2
Hi,

I just released a new version of the scheduler bigpatch which
features two changes:

- don't recalculate priority when we were off of the runqueue
for just one jiffie (3 on Alpha). This is done because
often-sleeping but still CPU-hungry processes got a bit too
much CPU time and you've missed pay time anyway when you
just slept over a jiffie increment
We now should be a bit fairer (read harsher) agaist those
10%-30% CPU using processes
- after a process has been on the run queue for LOAD_AVG
seconds, it is effectively put in a round robin scheduling
mode so speed/throughput is increased slightly.
This works because your CPU pigs are usually interrupted
by a key press from your editor which pollutes (far) less
than half of L2 and possibly not even all of L1 cache.
It would be a real shame to switch to the next CPU pig before
the timeslice is over -- yet the normal scheduler does this :)

You can get the patch from my home page. I am very interested in
results versus the normal scheduler and versus my old scheduler
patch. I am even more interested in results from larger multi-
user machines with loads of interactive processes running --
how do response times change, what else is happening, is there
a point where the scheduler 'breaks down', etc???

regards,

Rik -- the flu hits, the flu hits, the flu hits -- MORE
+-------------------------------------------------------------------+
| Linux memory management tour guide. H.H.vanRiel@phys.uu.nl |
| Scouting Vries cubscout leader. http://www.phys.uu.nl/~riel/ |
+-------------------------------------------------------------------+



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