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

From: William Lee Irwin III (wli@holomorphy.com)
Date: Mon Dec 17 2001 - 23:55:47 EST


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
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