ksoftirqd — Softirq daemon
ksoftirqd
is a
per-cpu kernel thread that runs when the machine is under
heavy soft-interrupt load. Soft interrupts are normally
serviced on return from a hard interrupt, but it's possible
for soft interrupts to be triggered more quickly than they
can be serviced. If a soft interrupt is triggered for a
second time while soft interrupts are being handled, the
ksoftirq
daemon is
triggered to handle the soft interrupts in process context.
If ksoftirqd
is
taking more than a tiny percentage of CPU time, this
indicates the machine is under heavy soft interrupt load.
ksoftirqd
was
introduced during the 2.3 development series as part of the
softnet work by Alexey Kuznetsov and David Miller.
|