[linux-dvb] Re: Help on use of DMX_OUT_TAP (II)

[Andreas Oberritter <andreas@oberritter.de>]

On Thu, 2003-06-05 at 22:15, James Green wrote:
> But when I did this fix I found that I still got overflow errors. I 
> instrumented the code a lot and found that the read routine couldn't keep 
> up with the write routine. The buffer size was the default, 8192 bytes. 
> This doesn't seem large enough on my PC, ie. it gets filled too quickly 
> before the read routine can get in. However, my PC is pretty quick, and it 
> is only 2% loaded, so I think the buffer default size needs increasing. 
> 16KB was enough for me, but if somebody has a slower PC they might need 
> bigger. Is there any problem with making the default bigger. It's pretty 
> useless at the moment.

Reading this, I remember that the old drivers (ost api) for the dbox2
had a default buffer size of 256KB, which should be the reason why they
did not get as many buffer overflows as the current dvb-core drivers.
:-)

Regards,
Andreas



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