[LAU] Slightly O/T was: linux-rt & presonus 1818VSL

On Wed, 3 Jul 2013 13:27:38 +0100
Harry van Haaren <harryhaaren@email-addr-hidden> wrote:

> On Wed, Jul 3, 2013 at 8:43 AM, Jeremy Jongepier <jeremy@email-addr-hiddenwrote:
>
> > 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.

-- 
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.
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