Re: Scheduler ( was: Just a second ) ...

[William Lee Irwin III]

On Mon, Dec 17, 2001 at 08:27:18PM -0800, Linus Torvalds wrote:
> The most likely cause is simply waking up after each sound interrupt: you
> also have a _lot_ of time handling interrupts. Quite frankly, web surfing
> and mp3 playing simply shouldn't use any noticeable amounts of CPU.

I think we have a winner:
/proc/interrupts
------------------------------------------------
           CPU0       
  0:   17321824          XT-PIC  timer
  1:          4          XT-PIC  keyboard
  2:          0          XT-PIC  cascade
  5:   46490271          XT-PIC  soundblaster
  9:     400232          XT-PIC  usb-ohci, eth0, eth1
 11:     939150          XT-PIC  aic7xxx, aic7xxx
 14:         13          XT-PIC  ide0

Approximately 4 times more often than the timer interrupt.
That's not nice...

On Mon, Dec 17, 2001 at 08:27:18PM -0800, Linus Torvalds wrote:
> Which sound driver are you using, just in case this _is_ the reason?

SoundBlaster 16
A change of hardware should help verify this.

Cheers,
Bill