[linux-dvb] Re: Nova card drops packets, but tuner reports 0 BER & 0 Uncorr blocks

[NoSpam-@zocki.toppoint.de (Rainer Zocholl)]

mocm@metzlerbros.de 20.04.02 21:20

Once upon a time shaped the electrons to say...

>Steve Brown writes:
>> Marcus,
>>
>> A quick followup after looking more closely at the dumps.
>>
>> Several errors occur where the first out of sequence packet was at
>> offset 0 blk n and last good packet was at offset 511 blk n-1.
>>
>> In a couple of cases, more than one packet was missing.
>>
>> If you would like to review the test prog, let me know and I'll send
>> it.

>No that's ok. We know what the problem is. The IRQ for the end of data
>transfer comes before the DMA is done. 

Because the P4 is so fast?
Hm, would that explain the problem i reported some month ago
"CPU too fast?" or so.

Why is the nova(budget) more critical than the "full" crads?


>So we have to wait in the IRQ
>until DMA is finished. 

Waiting in the IRQ?
I think that's no good idea for more than a quick check if this
would solve the problem.


>It should be solved with the next check in.

Rainer


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