On Sat, Feb 14, 2009 at 12:20 PM, pete shorthose <zenadsl6252@xxxxxxxxx> wrote: > On Tue, 10 Feb 2009 17:19:53 +0000 > pete shorthose <zenadsl6252@xxxxxxxxx> wrote: > >> On Tue, 10 Feb 2009 14:26:03 -0000 >> "Simon W. Fielding" <s.fielding@xxxxxxxxx> wrote: >> >> > >All of which indicates that I would see similar results on my system unless there is some kind of >> > >bug or problem that only affects you. In effect, you are seeing >1000% penalty for the use of firewire. >> > >Which is pretty horrific. >> >> > I guess that appears to be the case - unless someone more expert has any better opinions. >> >> Ok well all the information is pointing one way.. the dell may not be able to use this nor in in fact any >> firewire audio device and the firewire setup on linux seems to be extremely inefficient going by the >> information available. As such I decided the only thing to do was to ignore it all and buy one anyway. =] >> I'll jump in the pit with it and go a few rounds. If I don't get anywhere I'll sell it on or use it on windows. >> >> I'll report back with any linux related results (ie not bad dell hardware problems which are outside the >> scope of this list really). It should arrive in a couple of days. > > Ok, a small udpate on my experience with ffado, the hb 12MKII and my dell inspiron 9400. > > ..the abridged version: > > argh.. xrun xrun.. nooo xrun xrun.. remove dvd drive.. xrun xrun.. remove wireless and disable > ethernet... xrun.. try every other damn thing that people suggested.. xrun xrun.. > eventually discover that i8k.ko and thermal.ko cause cpu spikes.. remove them.. oh look, > rock solid RT performance with -r 96000 -p 256 -n 2 and 6.6% reported cpu usage when idle > (no connections). > > And they all skipped off into the woods to live noisily ever after. > The moral of the story.. DON'T buy an expresscard firewire interface until you have > exhausted all possibilities. Damn it. (probably wouldn't have helped anyway) > > Note that I put everything back as it was. It was only the thermal and i8k (dell fan/temp) module > that seem to have caused problems. also for google reference: > pete@one:~$ lspci -nn|grep -i firewire > 03:01.0 FireWire (IEEE 1394) [0c00]: Ricoh Co Ltd R5C832 IEEE 1394 Controller [1180:0832] > > Incidentally, does anyone know why this thing (the phonic) has 2 firewire ports on it? > > cheers, > pete. Are these modules part of the kernel? If they are - and sorry that I don't remember what real-time kernel you are using - but if the modules are part of a normal kernel.org package you believe they are causing the problem then we should report this to Ingo & the crew. They would certainly want to know what the errors look like in case it's an issue with the rt-kernel design. Most of the time it's the driver that needs some small mode to make it real-time safe. As for the multiple ports it's just so you can build a network I think. 1 cable to your PC - another to a disk drive or something else 1394-based. - Mark _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user
