Re: cpu load balancing problem on smp

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On Wed, 7 Feb 2007, Arjan van de Ven wrote:


Marc Donner wrote:
501:     215717     209388     209430     202514   PCI-MSI-edge      eth10
502:        927       1019       1053        888   PCI-MSI-edge      eth11

this is odd, this is not an irq distribution that irqbalance should give you
1
NMI:        451         39         42         46
LOC:     170899     170864     170846     170788
ERR:          0

top output:

top - 01:45:32 up 16 min,  2 users,  load average: 1.04, 0.92, 0.50
Tasks:  81 total,   3 running,  78 sleeping,   0 stopped,   0 zombie
Cpu0 : 0.0% us, 0.0% sy, 0.0% ni, 0.0% id, 0.0% wa, 0.0% hi, 100.0% si

and this doesn't match the irq output...
sounds as if something has a real bug; can you send an lsmod ? maybe some driver keeps doing si's

since this only happens when he adds more iptables rules, is it possible that there sis some locking, or otherdata structure access that's serializing things under load?

Marc, since you don't use modules, send your .config.

David Lang
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