[vdr] Re: High CPU usage of VDR 1.1.11

[Klaus Schmidinger <Klaus.Schmidinger@cadsoft.de>]

Oliver Endriss wrote:
> 
> Klaus Schmidinger wrote:
> > Oliver Endriss wrote:
> > > Hi,
> > >
> > > I just tested VDR 1.1.11 on a Pentium I 233 MMX.
> > > This is a slow machine, but there have never been any problems.
> > > (With VDR 1.0.4 peak CPU usage is about 25% during recording.)
> > >
> > > With VDR 1.1.11 and NEWSTRUCT driver, it is impossible to create a
> > > good recording.
> > >
> > > CPU usage is at 100% and there are lots of error messages in the syslog:
> > > [old log deleted]
> > >
> > > When I stop recording CPU usage is still at 100%, until I switch
> > > channels. Then it drops to normal (< 5%).
> > >
> > > I get similar results with the old driver + time-shifting firmware.
> > > After I disabled "#define DVB_DRIVER_VERSION 2002090101 //XXX+" VDR
> > > seems to work normal no watter which driver/firmware is being used.
> > >
> > > Before I start some debug sessions:
> > > Is it normal that the new code needs so much horse power?
> >
> > I assume this is a system with only a single DVB card, right?
> 
> Yes, DVB-S Nexus 2.1
> 
> > Looks like there is a problem in the transfer mode.
> > Could you try again and see which thread is causing the most CPU
> > load? From the log file you should be able to relate the process id
> > to the thread.
> 
> CPU load:
> transfer thread[18960]:   60-80%
> receiver thread[18961]:   10-20%
> recording thread[18963]:  5%
> 
> syslog output:
> ...
>
> Is it ok that transfer thread and receiver thread run until the channel is switched?

Yes, that's ok. However, the transfer thread shouldn't be using that much CPU power.

I'll look into this.

Klaus
-- 
_______________________________________________________________

Klaus Schmidinger                       Phone: +49-8635-6989-10
CadSoft Computer GmbH                   Fax:   +49-8635-6989-40
Hofmark 2                               Email:   kls@cadsoft.de
D-84568 Pleiskirchen, Germany           URL:     www.cadsoft.de
_______________________________________________________________


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