system resources in -current

Robert C. Noland III rnoland at 2hip.net
Wed Aug 10 15:26:09 GMT 2005


On Wed, 2005-08-10 at 17:40 +0300, Maxim Sobolev wrote:
> 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).

bbeng-laptop# vmstat -i
interrupt                          total       rate
irq0: clk                        3759063        998
irq1: atkbd0                         666          0
irq4: sio0                             1          0
irq6: fdc0                             1          0
irq7: ppc0                             1          0
irq8: rtc                         481352        127
irq9: pcm0 acpi0                      54          0
irq11: cbb0 cbb1+++               270224         71
irq13: npx0                            1          0
irq14: ata0                        12909          3
irq15: ata1                          133          0
Total                            4524405       1201

No, all of the load is attributed to system, interrupt load seems fine.

robert.
 
> -Maxim
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