Hi,
the machine was up for 19 days, hence in the meantime systemd was
updated. Today I build 5.15.73.52.realtime1-1-rt-lts from AUR as
provided by David, IOW without any changes done by me, but I didn't
build in a clean chroot. Bevor that I run my own package of linux-rt
4.19.246_rt110-0.1000 without doing anything special to it, just
CONFIG_AUDIT was disabled. Since last startup rtirq was updated, too,
but the only changes were migrations from egrep to grep -E.
In the past it happened very, very, very ... very seldom that after
startup the PCI or PCIe card didn't get a high priority, which always
was fixed by a single reboot.
Today, when booting 5.15.73.52.realtime1-1-rt-lts 4 times, the first
time snd_ice1 didn't get a high priority and the other times snd_ice1 as
well as snd_hdsp didn't get a high priority.
I doubt that it's related to the kernel. I suspect a systemd related
race condition, but I might be completely mistaken.
Any pointers are welcome.
Regards,
Ralf
[rocketmouse@archlinux ~]$ grep RTIRQ_NAME_LIST..u /etc/rtirq.conf
RTIRQ_NAME_LIST="usb snd_hdsp snd_ice1"
[rocketmouse@archlinux ~]$ rtirq status
PID CLS RTPRIO NI PRI %CPU STAT COMMAND
124 FF 90 - 130 0.0 S irq/16-ehci_hcd
184 FF 90 - 130 0.0 S irq/31-xhci_hcd
128 FF 89 - 129 0.0 S irq/23-ehci_hcd
88 FF 50 - 90 0.0 S irq/9-acpi
102 FF 50 - 90 0.0 S irq/29-ahci[000
116 FF 50 - 90 0.0 S irq/30-ahci[000
130 FF 50 - 90 0.0 S irq/8-rtc0
183 FF 50 - 90 0.0 S irq/1-i8042
324 FF 50 - 90 0.0 S irq/5-parport0
403 FF 50 - 90 0.0 S irq/32-mei_me
506 FF 50 - 90 0.0 S irq/18-i801_smb
572 FF 50 - 90 0.0 S irq/16-snd_hdsp
604 FF 50 - 90 0.0 S irq/34-i915
641 FF 50 - 90 0.0 S irq/35-snd_hda_
644 FF 50 - 90 0.0 S irq/16-snd_ice1
16 TS - 0 19 0.0 S ksoftirqd/0
30 TS - 0 19 0.0 S ksoftirqd/1
[rocketmouse@archlinux ~]$ uname -rm
5.15.73.52.realtime1-1-rt-lts x86_64
[rocketmouse@archlinux ~]$ pacman -Q linux-rt
linux-rt 4.19.246_rt110-0.1000
[rocketmouse@archlinux ~]$ pacman -Q rtirq
rtirq 20220923-1
[rocketmouse@archlinux ~]$ pacman -Q systemd
systemd 251.6-1
[root@archlinux rocketmouse]# rtirq stop
Setting IRQ priorities: stop [ehci.hcd] irq=16 pid=124 pid=124 prio=50: OK.
Setting IRQ priorities: stop [ehci.hcd] irq=23 pid=128 pid=128 prio=50: OK.
Setting IRQ priorities: stop [xhci.hcd] irq=31 pid=184 pid=184 prio=50: OK.
[root@archlinux rocketmouse]# rtirq start
Setting IRQ priorities: start [ehci.hcd] irq=16 pid=124 prio=90: OK.
Setting IRQ priorities: start [ehci.hcd] irq=23 pid=128 prio=89: OK.
Setting IRQ priorities: start [xhci.hcd] irq=31 pid=184 prio=90: OK.
Setting IRQ priorities: start [snd_hdsp] irq=16 pid=572 prio=85: OK.
Setting IRQ priorities: start [snd_ice1] irq=16 pid=644 prio=80: OK.
[root@archlinux rocketmouse]# rtirq status
PID CLS RTPRIO NI PRI %CPU STAT COMMAND
124 FF 90 - 130 0.0 S irq/16-ehci_hcd
184 FF 90 - 130 0.0 S irq/31-xhci_hcd
128 FF 89 - 129 0.0 S irq/23-ehci_hcd
572 FF 85 - 125 0.0 S irq/16-snd_hdsp
644 FF 80 - 120 0.0 S irq/16-snd_ice1
88 FF 50 - 90 0.0 S irq/9-acpi
102 FF 50 - 90 0.0 S irq/29-ahci[000
116 FF 50 - 90 0.0 S irq/30-ahci[000
130 FF 50 - 90 0.0 S irq/8-rtc0
183 FF 50 - 90 0.0 S irq/1-i8042
324 FF 50 - 90 0.0 S irq/5-parport0
403 FF 50 - 90 0.0 S irq/32-mei_me
506 FF 50 - 90 0.0 S irq/18-i801_smb
604 FF 50 - 90 0.0 S irq/34-i915
641 FF 50 - 90 0.0 S irq/35-snd_hda_
16 TS - 0 19 0.1 S ksoftirqd/0
30 TS - 0 19 0.1 S ksoftirqd/1
