system resources in -current

[Maxim Sobolev]

Robert C. Noland III wrote:
> On Wed, 2005-08-10 at 12:00 +0100, Gavin Atkinson wrote:
> 
>>On Tue, 2005-08-09 at 19:35 -0400, Robert C. Noland III wrote:
>>
>>>Since stepping up to 6-current just prior to releng_6 and now on
>>>7-current, the %cpu consumed by system as reported by systat -vmstat and
>>>top seems incredibly high. I have all of the debugging options turned
>>>off in the kernel, as well as:
>>>
>>>it rarely ever goes below 10%, and frequently is 25 - 50% and is
>>>generally significantly higher than user %
>>>
>>>#top -S
>>>
>>>last pid: 23808;  load averages:  0.55,  0.55,  0.54    up 0+01:46:06  19:34:24
>>>138 processes: 3 running, 111 sleeping, 24 waiting
>>>CPU states:  3.1% user,  0.0% nice, 16.0% system,  0.8% interrupt, 80.1% idle
>>
>>I am also seeing this one one of my systems (a laptop) running 6.  For
>>me, the effect only starts after it has been running for a while,
>>usually between 8 and 24 hours.  Do you also see this, or is it
>>continuous for you?  The only cure I have found is to reboot the
>>machine.
> 
> 
> 
> No, my issue is persistent.  Even single user sys consumes between .8
> and 2.5%.

It's possible that you have interrupt storm due to the ACPI issues or 
due to the some incompatibility with your hardware. Try to run systat 
-vm and check if any of the devices generates large number of interrupts 
(more than 1,000).

-Maxim