[lkml]   [2002]   [Jan]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [RFC] Summit interrupt routing patches
> idle CPUs.  If none are idle, then aim them at the CPUs running the "least 
> important" tasks. Also, since each CPU's local APIC only has two interrupt
> latches per `level' (the upper nibble of the IRQ's vector), it would be a
> good idea to avoid sending IRQs to those CPUs that are already processing one.

Im not sure aiming at least important is worth anything. Aiming at idle
processors on a box not doing power management seems easy providing you'll
accept 99.99% accuracy. Switch the priority up in the idle code, switch it
back down again before the idle task schedule()'s. If you hit during the
schedule well tough.

> soon. I wonder if Marcelo is going to allow this kind of futzing around with
> interrupt and scheduler code in 2.4....

Thats another reason to keep it small and clean.
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2005-03-22 13:15    [W:0.047 / U:3.436 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site