On Wed, 3 Jul 2013 14:26:44 +0100 Will Godfrey <willgodfrey@xxxxxxxxxxxxxxx> wrote: > On Wed, 3 Jul 2013 13:27:38 +0100 > Harry van Haaren <harryhaaren@xxxxxxxxx> wrote: > > > On Wed, Jul 3, 2013 at 8:43 AM, Jeremy Jongepier <jeremy@xxxxxxxxxxxxxx>wrote: > > > > > On 07/03/2013 12:19 AM, Harry van Haaren wrote: > > > Nice article Harry! Some remarks though: > > > * Is /dev/rtc the kernel timer? I thought it was the device node for > > > access to the real-time clock. I don't even think it's necessary to > > > prioritize it anymore because most applications use the kernel timer: > > > http://wiki.linuxaudio.org/wiki/system_configuration#hardware_timers > > > I'm far from an expert on timers so I could be wrong, I still find this > > > a bit of esoteric stuff. > > > > > Same here: I wrote that because its in my setup, and AFAIK its the kernel > > timer... Just found this article: > > https://www.kernel.org/doc/Documentation/rtc.txt It suggests that > > /dev/rtc is the "old" RTC, and /dev/rtc0 /dev/rtc1 .. rtcX is the new > > system. I have got /dev/rtc0 present on my system. I'll investigate into > > whether JACK / the ALSA backend use /dev/rtc, or if it really isn't used > > anymore. > > > > > > > * Using setpci in this context is deprecated unless you're still using > > > am machine with a PCI bus which I highly doubt: > > > http://wiki.linuxaudio.org/wiki/system_configuration#pci_bus_latency > > > > > I was advised on IRC that the PCI bandwidth reset would help, and it didn't > > negatively influence my machine: hence I added it. > > > > lspci -v -t shows that my firewire, cardbus ("CardBus bridge: Texas > > Instruments PCIxx12 Cardbus Controller") SD card and multimedia card > > readers are on the same branch, connected to the root node. I suppose > > rm-modding those kernel modules would ensure better performance (not using > > them probably suffices). > > > > The graphics chip is on its own node, also connected directly to the root. > > I don't think it'll get in the way.. Setting the latencies won't hurt, I'll > > leave it there for now but add a note that on modern hardware its not > > necessary. > > > > Thanks for the feedback! -Harry > > > Anyone got an idiot's guide for compiling a suitable kernel for debian squeeze? > I don't really have any problems but feel sure I could get more out of this > beast (a quad core AMD), and might get slightly better timing. Oops! Not Squeeze, but Wheezy :o -- Will J Godfrey http://www.musically.me.uk Say you have a poem and I have a tune. Exchange them and we can both have a poem, a tune, and a song. _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
