High wakeup rate as measured by powertop

[Andreas Hasenack]

Apparently landscape-* is one of the top causes for interrupts on a system, as measured by powertop:

root@maestro:~# powertop -d
PowerTOP 1.10 (C) 2007, 2008 Intel Corporation

Collecting data for 15 seconds

< Detailed C-state information is not available.>
P-states (frequencies)
Wakeups-from-idle per second : 92.9 interval: 15.0s
no ACPI power usage estimate available
Top causes for wakeups:
  19.3% ( 10.3) <interrupt> : ata_piix
  17.2% ( 9.1) landscape-clien : schedule_timeout (process_timeout)
  17.0% ( 9.0) landscape-broke : schedule_timeout (process_timeout)
  16.8% ( 8.9) landscape-manag : schedule_timeout (process_timeout)
  16.6% ( 8.8) landscape-monit : schedule_timeout (process_timeout)
   3.8% ( 2.0) <kernel core> : clocksource_check_watchdog (clocksource_watchdog)
(...)

This was measured on an Intrepid machine.