[mythtv-users] mythbackend and mythwelcome wakeup a lot (powertop report)

Udo van den Heuvel udovdh at xs4all.nl
Sat Jun 14 07:16:18 UTC 2008

David Rees wrote:
> I upgraded my FC6 MythTV system to F7 over the weekend and ran
> powertop to see how well  or poorly the system does. I'm using 0.20
> RPMs from Atrpms.  It turns out that mythfrontend and mythbackend wake
> up an awful lot (mythfrontend not running at the time):

I am using 21-fixes on F8 and I see:

Top causes for wakeups:
  54.5% (337.4)       mythbackend : do_nanosleep (hrtimer_wakeup)
  15.0% ( 92.8)       kdvb-ca-0:0 : schedule_timeout (process_timeout)
  13.0% ( 80.2)       <interrupt> : saa7146 (0), via at pci:0000:01:00.0
   9.4% ( 58.4)       mythbackend : schedule_timeout (process_timeout)
   2.5% ( 15.4)       mythbackend : futex_wait (hrtimer_wakeup)
   1.9% ( 12.0)   <kernel module> : usb_hcd_poll_rh_status (rh_timer_func)

[root at recorder ~]# mythfrontend --version
Please include all output in bug reports.
MythTV Version   : exported
MythTV Branch    : branches/release-0-21-fixes
Library API      : 0.21.20080304-1
Network Protocol : 40
Options compiled in:
 linux release using_oss using_alsa using_backend using_dbox2 using_dvb
using_firewire using_frontend using_hdhomerun using_iptv using_ivtv
using_joystick_menu using_lirc using_opengl_vsync using_v4l using_x11
using_xrandr using_xv using_xvmc using_xvmcw using_xvmc_vld
using_bindings_perl using_bindings_python using_opengl
using_ffmpeg_threads using_libavc_5_3 using_live

So what's the status? This is 'normal'?
There's only one multiplex, one real tuner here.
Using the virtual tuners I record three channels.

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