unusually high load averages

[Jake Khuon]

### On Thu, 29 Jan 2004 15:43:22 -0600, Jonathan Fosburgh
### <syjef at mdanderson.org> casually decided to expound upon
### freebsd-current at freebsd.org the following thoughts about "Re: unusually
### high load averages":

JF> Run `top` and see what your interrupts are doing. I'd guess you're suffering 

last pid:  1011;  load averages:  1.14,  0.93,  0.98    up 0+00:26:38
15:30:09
85 processes:  2 running, 73 sleeping, 10 waiting
CPU states:  0.8% user,  0.0% nice,  0.8% system,  0.4% interrupt, 98.1%
idle
Mem: 35M Active, 94M Inact, 38M Wired, 2480K Cache, 34M Buf, 74M Free
Swap: 1024M Total, 1024M Free

  PID USERNAME    PRI NICE   SIZE    RES STATE    TIME   WCPU    CPU COMMAND
   11 root        -16    0     0K    12K RUN     22:39 98.83% 98.83% idle
  661 root         96    0 42416K 33140K select   0:04  0.05%  0.05% XFree86
...


JF> from the IRQ20 storm.  vmstat -i should also tell you that.  A patch was 

# vmstat -i
interrupt                          total       rate
irq0: clk                         158958         99
irq1: atkbd0                        5423          3
irq6: fdc0                             2          0
irq8: rtc                         203476        127
irq11: cbb0 cbb1++*                91496         57
irq12: psm0                        11877          7
irq13: npx0                            1          0
irq14: ata0                        49687         31
irq15: ata1                           57          0
Total                             520977        327

JF> posted to this list in the last couple of weeks that deals with this.  It is 
JF> working for me (I first ran into this a couple of days ago).

I tried to apply the patch but it didn't go in cleanly so I'll have to
hand-massage it.  I did start running into this when I enabled ACPI because
the apm module is causing my kernel to panic for some reason.  However I
also notice this when I have ACPI disabled too.


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