[mythtv-commits] Ticket #3800: mythbackend and mythwelcome wakeup a lot
MythTV
mythtv at cvs.mythtv.org
Tue Aug 7 19:46:40 UTC 2007
#3800: mythbackend and mythwelcome wakeup a lot
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Reporter: anonymous | Owner: ijr
Type: enhancement | Status: new
Priority: minor | Milestone: unknown
Component: mythtv | Version: 0.20-fixes
Severity: medium | Mlocked: 0
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Running mythtv 0.20.1-161 (RPMs from ATrpms) on Fedora 7. Using powertop,
I have found that on an idle system, mythwelcome and mythbackend wakeup
very frequently from what appears to be polling loops with short sleeps.
mythfrontend isn't running.
Here is some data from power top. The % gives you the % of total wakeups
that process/event is responsible for, the number in parens is the number
of wakeups per second that process/event is responsible for.
43.8% (170.4) mythwelcome : schedule_timeout (process_timeout)
26.3% (102.2) mythbackend : schedule_timeout (process_timeout)
19.5% ( 75.6) <interrupt> : ivtv0, nvidia
5.1% ( 20.0) mythbackend : futex_wait (hrtimer_wakeup)
0.9% ( 3.5) wmaker : schedule_timeout (process_timeout)
0.9% ( 3.4) X : do_setitimer (it_real_fn)
Reducing the number of wakeups will reduce power consumption slightly on
all machines, but it is especially noticable on hardware which supports
lower CPU C-states.
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Ticket URL: <http://svn.mythtv.org/trac/ticket/3800>
MythTV <http://svn.mythtv.org/trac>
MythTV
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