Messages in this thread | | | Date | Tue, 7 Nov 2006 12:59:05 -0800 (PST) | From | Christoph Lameter <> | Subject | Re: + sched-use-tasklet-to-call-balancing.patch added to -mm tree |
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On Tue, 7 Nov 2006, Ingo Molnar wrote:
> Per-CPU tasklets are equivalent to softirqs, with extra complexity and > overhead ontop of it :-) > > so please just introduce a rebalance softirq and attach the scheduling > rebalance tick to it. But i'd suggest to re-test on the 4096-CPU box, > maybe what 'fixed' your workload was the global serialization of the > tasklet. With a per-CPU softirq approach we are i think back to the same > situation that broke your system before.
What broke the system was the disabling of interrupts over long time periods during load balancing.
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