Robert P. J. Day ha scritto:
one of my current students observes the following -- that the proc
files /proc/irq/<PID>/smp_affinity are not only readable, but writable
and wonders why one would want to *change* the smp_affinity of IRQs
for a given process (if that's actually what that would mean).
i've never looked closely at that. any thoughts?
rday
ASAIK PID here is not "Process ID" but is the "irq ID". So smp_affinity
simply binds that irq to a particular CPU.
This is done for better cache locality I think, because this irq will be
always served by the same CPU and the handler will (hopefully) be in the
local cache.
Please correct me if I'm wrong.
regards
Luca
--
To unsubscribe from this list: send an email with
"unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx
Please read the FAQ at http://kernelnewbies.org/FAQ
