Force HPET patch for 2.6.22 kernel?

[Kyle Cunningham]

Hi All,
Thanks for the help everyone.  The interrupt was being caused by the 
i810 driver and disabling DRI has really brought things down.  The new 
powertop output is below.

Cn                Avg residency       P-states (frequencies)
C0 (cpu running)        ( 3.3%)         1.60 Ghz     0.0%
C1                0.0ms ( 0.0%)         1333 Mhz     0.0%
C2                8.5ms (29.8%)         1067 Mhz     0.0%
C3               14.2ms (27.0%)          800 Mhz   100.0%
C4               10.5ms (39.9%)

Wakeups-from-idle per second : 92.0     interval: 3.0s
Power usage (ACPI estimate): 14.6W (0.9 hours)

Top causes for wakeups:
  24.8% ( 17.3)       <interrupt> : libata
  15.2% ( 10.7)       firefox-bin : futex_wait (hrtimer_wakeup)
  14.3% ( 10.0)   hald-addon-cpuf : cpufreq_governor_dbs 
(delayed_work_timer_fn)
   8.6% (  6.0)            kicker : schedule_timeout (process_timeout)
   7.6% (  5.3)       <interrupt> : ipw2200, Intel ICH6
   4.8% (  3.3)              Xorg : do_setitimer (it_real_fn)
   3.3% (  2.3)   thunderbird-bin : futex_wait (hrtimer_wakeup)
   2.4% (  1.7)    wpa_supplicant : schedule_timeout (process_timeout)
   1.9% (  1.3)              Xorg : schedule_timeout (process_timeout)
   1.4% (  1.0)          ifconfig : tg3_open (tg3_timer)
   1.4% (  1.0)              kwin : schedule_timeout (process_timeout)
   1.4% (  1.0)          kdesktop : schedule_timeout (process_timeout)
   1.4% (  1.0)    NetworkManager : schedule_timeout (process_timeout)
   1.4% (  1.0)          kwrapper : do_nanosleep (hrtimer_wakeup)
   1.4% (  1.0)     <kernel core> : queue_delayed_work_on 
(delayed_work_timer_fn)
   1.4% (  1.0)            dhcdbd : schedule_timeout (process_timeout)

Things are much better!  I have yet to apply the hrt patchset, I'll do 
so later and post my results.

Kyle Cunningham wrote:
> Hi All,
> Is there a patch that applies cleanly to 2.6.22.x kernels to
> force HPET on.  I have an Intel ICH6 chipset and as far as
> I know it should have this functionality but it isn't being
> enabled by default.
>
> In addition I have a strange problem with an ethernet interrupt
> which is being triggered even though it isn't connected to any
> network.  The ouput from powertop is below.
>
>
> 35.9% ( 66.0)       <interrupt> : extra timer interrupt
> 23.2% ( 42.7)       <interrupt> : eth0, i915 at pci:0000:00:02.0
> 11.3% ( 20.7)       <interrupt> : libata
> 5.4% ( 10.0)       <interrupt> : Intel ICH6, ipw2200
> 5.3% (  9.7)   hald-addon-cpuf : cpufreq_governor_dbs 
> (delayed_work_timer_fn)
> 4.0% (  7.3)       <interrupt> : acpi
> 3.4% (  6.3)            kicker : schedule_timeout (process_timeout)
> 2.0% (  3.7)              Xorg : do_setitimer (it_real_fn)
> 1.1% (  2.0)   thunderbird-bin : futex_wait (hrtimer_wakeup)
> 0.7% (  1.3)              Xorg : schedule_timeout (process_timeout)
> 0.7% (  1.3)    wpa_supplicant : schedule_timeout (process_timeout)
> 0.5% (  1.0)          kdesktop : schedule_timeout (process_timeout)
> 0.5% (  1.0)            dhcdbd : schedule_timeout (process_timeout)
> 0.5% (  1.0)          kwrapper : do_nanosleep (hrtimer_wakeup)
> 0.5% (  1.0)     <kernel core> : neigh_table_init_no_netlink 
> (neigh_periodic_timer)
> 0.5% (  1.0)          ifconfig : tg3_open (tg3_timer)
>
> If anyone has any ideas about these I would really appreciate the help.
>
> Cheers,
> Kyle
>
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