dave@lsuc.UUCP (David Sherman) (12/17/84)
We have a Perkin-Elmer 3220 which is running "Edition VII
Workbench", which is basically v7.
The P-E service people here in Toronto were looking at scheduler
problems for another customer. It seemed that when many processes
were running, the scheduler would lock some out for quite a long time.
They found that the following change solved the problem:
in slp.c, routine setrun():
if(p->p_pri < curpri)
runrun++;
changing the test from < to <=, so it reads
if(p->p_pri <= curpri)
This code goes back to v7 (it's identical to the version we had
on our 11/23 last year). Does anyone know whether this is a correct
fix? Are there any problems likely to result from making this change?
I think I understand the rationale behind it, but I don't know enough
about the v7 scheduler to be sure.
Dave Sherman
The Law Society of Upper Canada
Toronto
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