[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

RE: Query regarding interrupts on a dual core machine

>  
>  "The  purpose of irqbalance is distribute hardware interrupts across
>  processors on a multiprocessor system in order to increase
>  performance. It is useful mostly just
>  for 2.4 kernels, or 2.6 kernels with CONFIG_IRQBALANCE turned off."
>  
>  I tried this on another dual XEON processor machine(kernel 2.6.13).
On
>  this machine I can see from /proc/interrupts that interrupts are
>  distributed on both processors. But irqbalance is _not_ running on
>  this second machine.  The kernel config file is almost same as on my
>  dual core machine. I am confused now.

I haven't really followed the whole thread but AFAIR, irqbalancing is
done by the scheduler on kernel>2.6 where the kernel dispatches
interrupts on one processor for a while and then randomly switches to
another processor. You don't need to run irqbalance specifically to make
the kernel do this. 

./h



--
Kernelnewbies: Help each other learn about the Linux kernel.
Archive:       http://mail.nl.linux.org/kernelnewbies/
FAQ:           http://kernelnewbies.org/faq/