freebsd stable - Nov 2006 - FreeBSD 6.2-PRE: Jumping box. Worse performance

Compiling FreeBSD's world with make -j2 was never a problem while playing
sound or doing other work on screen - but this seems to be a big problem now,
even when SCHED_4BSD is used!

While compiling world mouse stops and jumps, sound gets distorted. I recognise
thsi behaviour also when box is doing minor HD access: mouse pointer stops,
keyboard input gets stuck, sound stops playing, window operations
(opening/closing) seems to freeze. This got even worse whithin the last two
weeks (date when it starts getting this worse unknown).
This phenomenon occurs on both i386 and amd64 but is much worse on amd64. On
AMD64 very short and small HD activities seems to trigger this 'jumping'
and stopping.

Both boxes are singel core CPUs, AMD64 is a Athlon 3500+, i386 is a HTT enabled
P4 at 3.0 GHz.

I do not get any error or system fault, simply this jumping and freezing.

On both systems PREEMPTION is enabled in the kernel, but the problem also occurs
without this option.

Any ideas, suggestion, maybe explanations?

Regards,
Oliver

On Fri, Nov 03, 2006 at 08:57:21PM +0100, O. Hartmann
wrote:
> 
> Compiling FreeBSD's world with make -j2 was never a problem while
playing sound or doing other work on screen - but this seems to be a big problem
now, even when SCHED_4BSD is used!
> 
> While compiling world mouse stops and jumps, sound gets distorted. I
recognise thsi behaviour also when box is doing minor HD access: mouse pointer
stops, keyboard input gets stuck, sound stops playing, window operations
(opening/closing) seems to freeze. This got even worse whithin the last two
weeks (date when it starts getting this worse unknown).
> This phenomenon occurs on both i386 and amd64 but is much worse on amd64.
On AMD64 very short and small HD activities seems to trigger this
'jumping' and stopping.
> 
> Both boxes are singel core CPUs, AMD64 is a Athlon 3500+, i386 is a HTT
enabled P4 at 3.0 GHz.
> 
> I do not get any error or system fault, simply this jumping and freezing.
> 
> On both systems PREEMPTION is enabled in the kernel, but the problem also
occurs without this option.
> 
> Any ideas, suggestion, maybe explanations?
Check for interrupt storms (vmstat -i).

Kris
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