[mythtv-users] High mythbackend CPU usage during DVB-T recording (Australia)

[Christian Hack]

On 15 July 2013 08:36, Kenni Lund <kenni at kelu.dk> wrote:

>
> Den 15/07/2013 00.28 skrev "Kenni Lund" <kenni at kelu.dk>:
>
> >
> >
> > Den 14/07/2013 12.57 skrev "Christian Hack" <christian at hack.id.au>:
> >
> > >
> > > Hi everyone
> > >
> > >
> > >
> > > Having some issues with my latest incarnation of MythTV.
> > >
> > >
> > >
> > > It’s mythbuntu based from 12.04 and updated to the latest everything.
> Mythbackend reports as “mythbackend version: fixes/0.25
> [v0.25.3-48-g3a1eff8] www.mythtv.org”
> > >
> >
> > You should really start up the Mythbuntu control center on your system
> and switch to the currently supported fixes/0.26 branch instead. The CPU
> utilization numbers you're seeing are much higher than anything I've seen
> recently on any DVB-T based system, so it's not unlikely that you're
> hitting some bug which is already fixed in fixes/0.26.
> >
> > Also, do you use get your EPG from EIT? If not, you should be able to
> save some CPU cycles by disabling EIT.
> >
> > FYI, the upcoming MythTV 0.27 contains multiple optimizations which
> should lower the CPU utilization when recording (see for example ticket
> #12250, #11252 or #11255)
>
> Sorry, that should have been #11250, not #12250.
>
> Best regards
> Kenni
>
Gave 0.26 a whirl last night and after fighting a number of issues which
were a pain (mysql timezone issue, mythweb broken, mythtv-database upgrade
failed, password issue in config.xml), I have 0.26 running. Unfortunately
that also seems to have mostly broken the PiP which had previously
worked fairly well in 0.25 with VDPAU :( . Just when I needed it for Tour
de France and the Ashes...

Anyway, with 2 HD recordings that I had running CPU usage dropped from what
would normally be around 130%-140%-150% to around 90%. Still fairly high in
my opinion but definitely improved noticeably.

EPG comes from a scraper. EIT is off on all tuners and also even on the
channels themselves and I've never used it here since it's (well was) a bit
rubbish.
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