Messages in this thread | | | Date | Thu, 4 Jul 2002 15:04:49 +0200 | From | Vitez Gabor <> | Subject | Re: [announce] [patch] batch/idle priority scheduling, SCHED_BATCH |
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On Mon, Jul 01, 2002 at 02:26:42AM +0200, Ingo Molnar wrote: > the load generated by multiple SCHED_BATCH processes does not show up in > the load average - this is the straightforward solution to not confuse > load-average-sensitive applications such as sendmail.
I think this will confuse atd too, which is an obvious candidate for the batch scheduler; it may end up starting all jobs which sit in it's "batch" queue.
I think a load-average calculation scheme like this would be better:
oldload: is the load average calculated the old way batchload: is the load average calculated only from the batch scheduler numcpus: number of cpus...
newload(){ if (oldload > numcpus) return oldload; if ((oldload+batchload) > numcpus) return numcpus; return (oldload+batchload) }
So the batch processes would show the CPUs maxed out, but would not show up as overload in the load average. (and you could run "atd -l <numcpus - 0.3>")
regards: Gabor Vitez - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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