rtctl as alternative to rtirq Hi Rui Just out of interest I was able to assign different priorites to devices sharing the same IRQ with rtctl after deinstalling rtirq. The hardwire irqs are now prioritised as follows. <code>simon@simon-Precision-M4300:~$ rtctl show hardirq 31 85 FF [irq/9-acpi] 58 85 FF [irq/14-ata_piix] 59 85 FF [irq/15-ata_piix] 64 85 FF [irq/18-ata_piix] 68 85 FF [irq/22-ehci_hcd] 69 85 FF [irq/20-ehci_hcd] 70 85 FF [irq/20-uhci_hcd] 71 85 FF [irq/21-uhci_hcd] 72 85 FF [irq/20-uhci_hcd] 73 85 FF [irq/21-uhci_hcd] 74 85 FF [irq/22-uhci_hcd] 75 85 FF [irq/12-i8042] 76 85 FF [irq/1-i8042] 77 90 FF [irq/8-rtc0] 147 88 FF [irq/19-firewire] 176 85 FF [irq/45-nouveau] 435 89 FF [irq/19-yenta] 600 85 FF [irq/46-snd_hda_] 611 85 FF [irq/47-iwl3945] 1150 50 FF [irq/48-eth0] simon@simon-Precision-M4300:~$ </code> The rtgroups that I used to do this are as follows: <code>kthreads:*:1:*:\[.*\]$ watchdog:f:99:*:\[watchdog.*\] migration:f:99:*:\[migration\/.*\] softirq:f:70:*:\[.*(softirq|sirq).*\] softirq-net-tx:f:75:*:\[(softirq|sirq)-net-tx.*\] softirq-net-rx:f:75:*:\[(softirq|sirq)-net-rx.*\] softirq-sched:f:1:*:\[(softirq|sirq)-sched\/.*\] rpciod:f:65:*:\[rpciod.*\] lockd:f:65:*:\[lockd.*\] nfsd:f:65:*:\[nfsd.*\] hardirq:f:85:*:\[(irq|IRQ)[\-_/].*\] cardctl:f:88:*:\[irq/19-firewire] hostctl:f:89:*:\[irq/19-yenta] timer:f:90:*:\[irq/8-rtc0]</code> Format is: <groupname>:<sched>:<prio>:affinity:<regex> sched 'f' is fifo otherwise '*' (leave alone) is cfs The prcocess names that can be chosen can be found with: <code>$ ps -eo cmd</code> The synchronisation between ffado and jackd still keeps slipping due to xruns but the number of xruns has however dropped significantly. I guess I need to tweak the settings of the rtgroups - I haven't found any suggestions using rtctl in audio production workstations... Cheers, Simon Reply
Hi Rui
Just out of interest I was able to assign different priorites to devices sharing the same IRQ with rtctl after deinstalling rtirq.
The hardwire irqs are now prioritised as follows.
<code>simon@simon-Precision-M4300:~$ rtctl show hardirq
31 85 FF [irq/9-acpi]
58 85 FF [irq/14-ata_piix]
59 85 FF [irq/15-ata_piix]
64 85 FF [irq/18-ata_piix]
68 85 FF [irq/22-ehci_hcd]
69 85 FF [irq/20-ehci_hcd]
70 85 FF [irq/20-uhci_hcd]
71 85 FF [irq/21-uhci_hcd]
72 85 FF [irq/20-uhci_hcd]
73 85 FF [irq/21-uhci_hcd]
74 85 FF [irq/22-uhci_hcd]
75 85 FF [irq/12-i8042]
76 85 FF [irq/1-i8042]
77 90 FF [irq/8-rtc0]
147 88 FF [irq/19-firewire]
176 85 FF [irq/45-nouveau]
435 89 FF [irq/19-yenta]
600 85 FF [irq/46-snd_hda_]
611 85 FF [irq/47-iwl3945]
1150 50 FF [irq/48-eth0]
simon@simon-Precision-M4300:~$ </code>
The rtgroups that I used to do this are as follows:
<code>kthreads:*:1:*:\[.*\]$
watchdog:f:99:*:\[watchdog.*\]
migration:f:99:*:\[migration\/.*\]
softirq:f:70:*:\[.*(softirq|sirq).*\]
softirq-net-tx:f:75:*:\[(softirq|sirq)-net-tx.*\]
softirq-net-rx:f:75:*:\[(softirq|sirq)-net-rx.*\]
softirq-sched:f:1:*:\[(softirq|sirq)-sched\/.*\]
rpciod:f:65:*:\[rpciod.*\]
lockd:f:65:*:\[lockd.*\]
nfsd:f:65:*:\[nfsd.*\]
hardirq:f:85:*:\[(irq|IRQ)[\-_/].*\]
cardctl:f:88:*:\[irq/19-firewire]
hostctl:f:89:*:\[irq/19-yenta]
timer:f:90:*:\[irq/8-rtc0]</code>
Format is: <groupname>:<sched>:<prio>:affinity:<regex>
sched 'f' is fifo otherwise '*' (leave alone) is cfs
The prcocess names that can be chosen can be found with:
<code>$ ps -eo cmd</code>
The synchronisation between ffado and jackd still keeps slipping due to xruns but the number of xruns has however dropped significantly.
I guess I need to tweak the settings of the rtgroups - I haven't found any suggestions using rtctl in audio production workstations...
Cheers, Simon