[linux-dvb] Re: lots of TS continuity errors + SuSE 9.1

[Rainer Zocholl <UseNet-Posting-Nospam-74308-@zocki.toppoint.de>]

(Matthias Bodenbinder)  21.11.04 14:46


>On Sunday 21 November 2004 01:57, Hamish Moffatt wrote:
>> On Sat, Nov 20, 2004 at 09:20:03PM +0100, Matthias Bodenbinder
>> wrote:
>>> I did one more test with several channels. It seems that the errors
>>> occur mainly on the channels: ZDF, RTL, SuperRTL and NTV.
>>>
>>> How are those channels related? Any idea?
>>
>> Maybe those have the highest data rate, which would exacerbate the
>> problem. dvbsnoop with "-s bandwidth" can monitor the data rate of a
>> channel; it would be interesting to compare the channels that are
>> giving you problems with ones that work.
>>
>> Hamish

>Hello Hamish,

>I tried dvbsnoop and it gives interesting results. On most channels it
>says:

>packets read:   3/(1920)   d_time:  0.187 s  =    24.128 kbit/s (Avrg: 7.643 kbit/s)
>packets read:   3/(1923)   d_time:  0.200 s  =    22.560 kbit/s (Avrg: 7.651 kbit/s)
>packets read:   3/(1926)   d_time:  0.201 s  =    22.448 kbit/s (Avrg: 7.659 kbit/s)

All radio?


>but on ZDF for example it says:

>packets read:   3/(168)   d_time:  0.020 s  =   225.600 kbit/s (Avrg: 7.120 kbit/s)
>packets read:   3/(171)   d_time:  0.020 s  =   225.600 kbit/s (Avrg: 7.243 kbit/s)
>packets read:   3/(174)   d_time:  0.020 s  =   225.600 kbit/s (Avrg: 7.366 kbit/s)
>and it takes much longer to scan.

That gives the "typical" "1GB/h" data rate.

Your disk can write 20000kbit/s...(we hope...)
That would be a 100 times more.

What does "top" say when you have the problem?




>This output was generated with channels.conf entry:
>ZDF:11954:h:S19.2E:27500:110:120:130:0:28006:0:0:0

>I have the same big numbers with:
>SAT1 (150.400 kbit/s), Pro7 (150.400 kbit/s), Kabel 1(150.400 kbit/s),
>KIKA (225.600 kbit/s), N24 (150.400 kbit/s), EURONEWS (322.286 kbit/s), 
>3SAT (237.474 kbit/s), ZDFInfo (225.600 kbit/s), ZDFTheater
>(225.600 kbit/s), ZDFDoku (237.474 kbit/s), DSF (155.586 kbit/s),
>Eurosport (237.474 kbit/s),

>Interesting to see that the Avrg values remain the same with ca. 5-7
>kbit/s. What does that tell me? 
>Why wasnt that a problem with SuSE 8.x and kernel 2.4? 

Have you checked your antenna settings?
Maybe two things are changed at the same time.
Have you tested how fast your system can write?



>How can I change the data rate?

That is given by the programs.
The data rate is not "high", it's quite normal.

Rainer