lkml.org 
[lkml]   [2003]   [Apr]   [22]   [last100]   RSS Feed
Views: [more markup]  [less markup]  [headers]  [forward] 
 
Messages in this thread
/
DateTue, 22 Apr 2003 12:06:30 +0200
FromPhilippe Gramoullé <>
SubjectRe: 2.5.67-mm4 & IRQ balancing
Hello,

On Sat, 19 Apr 2003 13:38:37 -0700
Andrew Morton <akpm@digeo.com> wrote:

  | Philippe Gramoullé <philippe.gramoulle@mmania.com> wrote:
  | >
  | > [ SMP IRQ distribution ]
  | >
  | > Is this what you are looking for ? and are the values changes meaningful ?
  | 
  | Looks good to me.  But it didn't affect your machine at all, did it?
Well, no, i didn't really felt a clear change.
  | 
  | This stuff only counts when the machine is doing a lot of work.  The current
  | IRQ balancer works well under high interrupt frequencies, but does quite the
  | wrong thing if you're doing a lot of softirq work at low interrupt
  | frequencies (gige routing with NAPI).
This box is used as a desktop box, so quite a lots of open applications, but no
real high load/IO except few kernel compiles and BK consistency checks.

Thanks,

Philippe


Booted with "noirqbalance" & started irqbalance:

$ cat /proc/interrupts
           CPU0       CPU1       
  0:      73897  247288143    IO-APIC-edge  timer
  1:      38421         56    IO-APIC-edge  i8042
  2:          0          0          XT-PIC  cascade
  3:        177          0    IO-APIC-edge  serial
  8:     107607          0    IO-APIC-edge  rtc
 12:          3          0    IO-APIC-edge  i8042, i8042, i8042, i8042
 15:         32        118    IO-APIC-edge  ide1
 18:      12602       1159   IO-APIC-level  EMU10K1
 19:     454172      15987   IO-APIC-level  uhci-hcd
 20:     494005          0   IO-APIC-level  eth0
 22:     717483      38681   IO-APIC-level  aic7xxx
 23:          0          0   IO-APIC-level  uhci-hcd
NMI:          0          0 
LOC:  247366287  247364170 
ERR:          0
MIS:          0

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 12:34    [from the cache]
©2003-2008