[arch-dev-public] New package: irqbalance
dpmcgee at gmail.com
Thu Oct 23 19:35:50 EDT 2008
Does anyone have any comments on pulling a new package into our repos (extra)?
What is irqbalance?
irqbalance is a Linux* daemon that distributes interrupts over the
processors and cores you have in your computer system. The design goal
of irqbalance is to do find a balance between power savings and
optimal performance. To a large degree, the work irqbalance does is
invisible to you; if irqbalance performs its job right, nobody will
ever notice it's there or want to turn it off.
I was poking around gerolde today and noticed the following, which
this daemon is supposed to fix:
$ cat /proc/interrupts
CPU0 CPU1 CPU2 CPU3
0: 167 0 0 24048 IO-APIC-edge timer
34: 0 0 0 1557024287 IO-APIC-fasteoi ioc0
64: 0 0 0 2309314931 IO-APIC-fasteoi eth0
LOC: 1044939304 862822858 922819431 1061796506 Local timer interrupts
RES: 47509379 41864565 96191013 60946968 Rescheduling interrupts
CAL: 28955 30778 32683 31325 function call interrupts
TLB: 42452901 45130904 34918196 34859372 TLB shootdowns
Notice how CPU3 is handling every single hardware interrupt on our
system, and we have a LOT of them from our disk and ethernet
controllers. Balancing some of this across processors should help, and
this program takes care of that. I've been running it locally on my
machine and it seems to work as advertised.
More information about the arch-dev-public