[vdr] power consumption, powertop and wakups per second with a af9015 device, vp7045, and various plugins

Heinrich Langos henrik-vdr at prak.org
Mon Mar 23 23:02:28 CET 2009


For completeness and comparability:

The Fujitsu Stick (vp7045) still by far beats the af9015 
in terms of resource usage with vdr. (13% vs 19% with or
37% without hw pid filter) 

It doesn't seem to hava a hw pid filter ( at least it doesn't 
react to the force_pid_filter_usage option. so here are 
the results with the same setup, using the same channels and 
the same vdr plugins:

--------------------------- without remote, without pid filter
------------------ zap
     PowerTOP version 1.10      (C) 2007 Intel Corporation

Cn                Avg residency       P-states (frequencies)
C0 (cpu running)        ( 5.7%)          750 Mhz     0.0%
polling           0.0ms ( 0.0%)          563 Mhz     0.0%
C1 halt           0.0ms ( 0.0%)          375 Mhz     0.0%
C2                0.0ms ( 0.0%)          188 Mhz   100.0%
C3                2.0ms (94.3%)

Wakeups-from-idle per second : 473.5    interval: 10.0s
no ACPI power usage estimate available

Top causes for wakeups:
  55.7% (592.2)   USB device  5-1 : DVB-T 2 (Afatech)
  42.9% (455.9)       <interrupt> : uhci_hcd:usb1, ehci_hcd:usb5, HDA Intel
   0.5% (  5.7)               zap : schedule_timeout (process_timeout)
   0.2% (  2.4)    kdvb-ad-0-fe-0 : schedule_timeout (process_timeout)
   0.2% (  2.0)           xfsaild : schedule_timeout (process_timeout)
   0.2% (  1.6)           xfsbufd : schedule_timeout (process_timeout)
   0.1% (  1.0)               zap : do_nanosleep (hrtimer_wakeup)

-------------------- vdr
     PowerTOP version 1.10      (C) 2007 Intel Corporation

Cn                Avg residency       P-states (frequencies)
C0 (cpu running)        (13.0%)          750 Mhz     0.0%
polling           0.0ms ( 0.0%)          563 Mhz     0.0%
C1 halt           0.0ms ( 0.0%)          375 Mhz     0.0%
C2                0.1ms ( 0.1%)          188 Mhz   100.0%
C3                1.5ms (86.8%)

Wakeups-from-idle per second : 611.1    interval: 10.0s
no ACPI power usage estimate available

Top causes for wakeups:
  45.1% (540.5)   USB device  5-1 : DVB-T 2 (Afatech)
  34.9% (418.2)       <interrupt> : uhci_hcd:usb1, ehci_hcd:usb5, HDA Intel
  18.4% (220.8)               vdr : futex_wait (hrtimer_wakeup)


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