Hi,
I've got a new mobo, it's a GIGABYTE GA-B85M-D3H.
It has got 8 "USB 2.0/1.1 ports"[1] and 2 "USB 3.0/2.0 ports"[1].
[1] Quoting the user's manual
Actually it provides 4 USB 3.0/2.0 ports, but only 2 are available at
the moment, since I don't have brackets/front panels for USB 3.0.
There are two ehci devices, one shares the IRQ with audio cards.
If I unbind the ehci device that shares the IRQ with audio cards, still
all 10 available USB ports work, but I get rid of sharing the IRQ with
USB.
Could somebody explain what this does mean? If I unbound ports on my
old mobo, they stopped working.
[rocketmouse@archlinux ~]$ rtirq status
PID CLS RTPRIO NI PRI %CPU STAT COMMAND
102 FF 90 - 130 0.0 S irq/16-ehci_hcd
225 FF 90 - 130 0.0 S irq/27-xhci_hcd
119 FF 89 - 129 0.0 S irq/23-ehci_hcd
312 FF 85 - 125 0.0 S irq/16-snd_hdsp
313 FF 80 - 120 0.0 S irq/16-snd_ice1
38 FF 50 - 90 0.0 S irq/9-acpi
52 FF 50 - 90 0.0 S irq/8-rtc0
101 FF 50 - 90 0.0 S irq/1-i8042
104 FF 50 - 90 0.4 S irq/25-ahci[000
224 FF 50 - 90 0.0 S irq/26-mei_me
227 FF 50 - 90 0.0 S irq/5-parport0
229 FF 50 - 90 0.0 S irq/28-snd_hda_
235 FF 50 - 90 0.0 S irq/30-i915
314 FF 50 - 90 0.0 S irq/18-i801_smb
315 FF 50 - 90 0.0 S irq/31-snd_hda_
442 FF 50 - 90 0.0 S irq/29-enp3s0
3 TS - 0 19 0.0 S ksoftirqd/0
21 TS - 0 19 0.0 S ksoftirqd/1
[rocketmouse@archlinux ~]$ cd /sys/bus/pci/drivers/ehci-pci/
[rocketmouse@archlinux ehci-pci]$ ls -l | grep devices
lrwxrwxrwx 1 root root 0 Feb 19 17:00 0000:00:1a.0 -> ../../../../devices/pci0000:00/0000:00:1a.0
lrwxrwxrwx 1 root root 0 Feb 19 17:00 0000:00:1d.0 -> ../../../../devices/pci0000:00/0000:00:1d.0
[rocketmouse@archlinux ehci-pci]$ printf "0000:00:1a.0" | sudo tee unbind >/dev/null
[sudo] password for rocketmouse:
[rocketmouse@archlinux ehci-pci]$ ls -l | grep devices
lrwxrwxrwx 1 root root 0 Feb 19 17:00 0000:00:1d.0 -> ../../../../devices/pci0000:00/0000:00:1d.0
[rocketmouse@archlinux ehci-pci]$ rtirq status
PID CLS RTPRIO NI PRI %CPU STAT COMMAND
225 FF 90 - 130 0.0 S irq/27-xhci_hcd
119 FF 89 - 129 0.0 S irq/23-ehci_hcd
312 FF 85 - 125 0.0 S irq/16-snd_hdsp
313 FF 80 - 120 0.0 S irq/16-snd_ice1
38 FF 50 - 90 0.0 S irq/9-acpi
52 FF 50 - 90 0.0 S irq/8-rtc0
101 FF 50 - 90 0.0 S irq/1-i8042
104 FF 50 - 90 0.1 S irq/25-ahci[000
224 FF 50 - 90 0.0 S irq/26-mei_me
227 FF 50 - 90 0.0 S irq/5-parport0
229 FF 50 - 90 0.0 S irq/28-snd_hda_
235 FF 50 - 90 0.0 S irq/30-i915
314 FF 50 - 90 0.0 S irq/18-i801_smb
315 FF 50 - 90 0.0 S irq/31-snd_hda_
442 FF 50 - 90 0.0 S irq/29-enp3s0
3 TS - 0 19 0.0 S ksoftirqd/0
21 TS - 0 19 0.0 S ksoftirqd/1
Regards,
Ralf
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