Sure. I tried (1, 2, 4, 10) and (1, 4, 10, 20) (and a few others),
echoing each value into the appropriate /proc/irq/XXX/smp_affinity field.
Thanks,
Don
Aaron Porter wrote:
On Tue, Oct 14, 2008 at 12:05 PM, Don Porter <porterde@xxxxxxxxxxxxx> wrote:
What I am observing is that a single ksoftirqd thread is becoming a
bottleneck for the system.
More specifically, one cpu runs ksoftirqd at 100% cpu utilization, while 4
cpus each run their servers at about 25%. I carefully used
sched_setaffinity() to map server threads to cpus and
/proc/irq/<device>/smp_affinity to map hardware interrupts to cpus such that
there should be exactly 1 cpu per server thread and 1 cpu for servicing
hardware interrupts per device.
Could you provide some more detail about the smp_affinity mask you're
setting? I can push a pretty constant 5.9gbps out of a 6gb bond device
(2 x forcedeth, 4 x e1000) using the 1 IRQ/CPU method.
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