Messages in this thread | | | Date | Fri, 8 Jan 1999 18:03:19 +0100 (CET) | From | MOLNAR Ingo <> | Subject | Re: Can and should the kernel HZ value be changed? |
| |
On Fri, 8 Jan 1999, Pavel Machek wrote:
> Anyway, there's obscure test p->counter > current->counter + 3, which > probably should be (3 * HZ) / 100. This could do some marginal > difference in some cases.
nod, good spotting. (it's not obscure, but should be HZ-independent i agree) decreasing +3 to something less just hides the real problem. (and causes excessive reschedules between CPU-intensive processes)
> > but after a few seconds, your shell gathers enough 'interactiveness > > priority' to not hang when you hit 'Enter'. > > That agrees with experiment. I just would like login to be fast even > with CPU hogs running in background, automatically (renice them works).
note that this (fork-time priority sharing) mechanizm makes us 'survive' fork bombs without problems. There should be no exploitable 'additional timeslice source' in the system, other than 'time'.
-- mingo
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/
| |