14 Feb
2016
14 Feb
'16
6:30 p.m.
This stuff has all been written up with startling depth:
http://wiki.linuxaudio.org/wiki/system_configuration
On Sun, Feb 14, 2016 at 12:07 PM, jonetsu(a)teksavvy.com <jonetsu(a)teksavvy.com
wrote:
> On Sat, 13 Feb 2016 16:01:57 -0500
> "jonetsu(a)teksavvy.com" <jonetsu(a)teksavvy.com wrote:
>
> > It would be so nice to have no delay at all!
>
> Here is what was done so far. The test is with jackd -p 128 eg.:
>
> /usr/bin/jackd -T -ndefault -dalsa -dhw:M1010LT -r44100 -p128 -n2
>
> When playing an Ardour session, there is plenty of crackling noise
> still.
>
> kernel: 3.13.0-77-lowlatency
>
> /etc/default/rtirq is:
> #RTIRQ_NAME_LIST="rtc snd usb i8042"
> RTIRQ_NAME_LIST="snd_ice1712"
>
> % ./rtirq start
> Setting IRQ priorities: start [snd_ice1712] irq=18 pid=547 prio=90: OK.
>
> % cat /proc/irq/18/smp_affinity
> f
>
> % echo 2 > /proc/irq/18/smp_affinity
>
> % cat /proc/interrupts
> CPU0 CPU1 CPU2 CPU3
> 0: 28 0 0 0 edge timer
> 1: 3 0 0 0 edge i8042
> 4: 0 0 0 2 edge
> 8: 0 1 0 0 edge rtc0
> 9: 0 3 0 0 fasteoi acpi
> 12: 3 1 0 0 edge i8042
> 18: 476281 151882 127790 60568 fasteoi snd_ice1712
> 23: 117 12720 2133 42 fasteoi ehci_hcd:usb1,
>
> % ./rtirq status
>
> PID CLS RTPRIO NI PRI %CPU STAT COMMAND
> 87 FF 90 - 130 0.0 S irq/8-rtc0
> 547 FF 90 - 130 1.2 S irq/18-snd_ice1
>
> When playing an Ardour session, lots of these:
>
> JackEngine::XRun: client = mixbus was not finished, state = Running
> JackAudioDriver::ProcessGraphAsyncMaster: Process error
>
>
>
>
>
>
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