[linux-dvb] Flooding interrupts

Dominik Kuhlen dkuhlen at gmx.net
Tue Sep 26 08:53:13 CEST 2006


Hi,
On Monday 25 September 2006 17:11, Jimmy Hedman wrote:
> Hi,
> I have a Compro DVB-T 300 which uses the saa7134-dvb-driver. When it's
> tuned it is flooding my system with between 12000 and 16000 interrupts a
> second. It works, but that amout of interrupts doesn't sound healty. Any
> ideas what this could be?
I have got a Terratec Cinergy T² which causes about 3200 Interrupts / second.
The reason is:
DVB-T Input rate=13276kBit/s (measured with dvbtraffic)
BULK EP max packet size=512Byte (from /proc/bus/usb/devices)
makes 13276 / 8 * 1000 / 512 = 3241.2 Bulk-packtes/second
>
> Many thanks in advance,
> Jimmy Hedman
>
>
But this is no explanation why your device generates so many interrupts:-(
Probably max packet size=128.

Dominik



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