From: Stefan Richter <stefanr@s5...> - 2010-07-11 14:20:59
Arnold Krille wrote on 2010-04-23:
> I am trying to get ffado running on a 450MHz headless ex-server. For drc and
> maybe foh-master-processing. And for the fun of it...
> Anyway ffado detects the attached device(s) just fine and even tries to start
> the streaming. Unfortunately it seems the streams can't be established
> The interesting thing is that it starts with a "OHCI issue" when it skips
> packets. Anybody knows what that means?
> Attached two bzipped logs of runs with "jackd -R -dfirewire -v6 &> log_file".
> And the uncompressed but reduced excerpt that starts just at the ohci-issue.
> I don't yet know whether its something hardware-error-related or if its ffado
> or just insufficient pci- or cpu-speed. But the same controller works flawless in
> my desktop machine...
> Looking into this I also started running ffado+jack inside callgrind. But that
> is worth another email.
> 00737714453: Debug (IsoHandlerManager.cpp) getPacket: (0x9332588) OHCI issue on cycle 2596 (dropped_cycles=0, last_cycle=2596, dropped=1, skipped: 4)
Regarding "OHCI issue":
As far as I can tell, "OHCI issue" is reported after an overflow of the
isochronous reception DMA ring buffer or underflow of the isochronous
transmission DMA ring buffer. I.e. ffado did not queue new packets in
time at one or more occasions.
-=====-==-=- -=== -=-==