amd64/179376: xhci ehci irq storm

[Michal Sviba]

>Number:         179376
>Category:       amd64
>Synopsis:       xhci ehci irq storm
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-amd64
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Jun 06 19:30:00 UTC 2013
>Closed-Date:
>Last-Modified:
>Originator:     Michal Sviba
>Release:        9.1
>Organization:
>Environment:
9.1-RELEASE-p2 #0: Mon Apr 29 13:25:59 CEST 2013
>Description:
CPU load is high because of to much interrupts.

#vmstat -i
interrupt                          total       rate
irq16: xhci0 ehci0           20060263963      14114
irq23: ehci1                     2844944          2
cpu0:timer                    1227368754        863
irq264: em0                     39704787         27
irq265: hdac0                         77          0
irq266: ahci0                    5757249          4
cpu1:timer                      30460523         21
cpu3:timer                      26554702         18
cpu2:timer                      35402259         24
Total                        21428357258      15077

#sysctl hw.usb.ehci.debug=1
#sysctl hw.usb.xhci.debug=1

#tail -f /var/log/messages
Jun  6 21:22:25 ms10 kernel: ehci_set_hw_power:
Jun  6 21:22:25 ms10 kernel: ehci_set_hw_power: Periodic is active
Jun  6 21:22:25 ms10 kernel: ehci_set_hw_power:
Jun  6 21:22:25 ms10 kernel: ehci_set_hw_power: Async is active
Jun  6 21:22:25 ms10 kernel: ehci_set_hw_power: Periodic is active
Jun  6 21:22:25 ms10 kernel: ehci_set_hw_power:
Jun  6 21:22:25 ms10 kernel: ehci_set_hw_power: Periodic is active
Jun  6 21:22:25 ms10 kernel: ehci_set_hw_power:
Jun  6 21:22:25 ms10 kernel: ehci_set_hw_power: Async is active
Jun  6 21:22:25 ms10 kernel: ehci_set_hw_power: Periodic is active
Jun  6 21:22:29 ms10 kernel: xhci_set_hw_power:
Jun  6 21:22:29 ms10 kernel: ehci_set_hw_power:
Jun  6 21:22:29 ms10 kernel: ehci_set_hw_power: Periodic is active
Jun  6 21:22:29 ms10 kernel: ehci_set_hw_power:
Jun  6 21:22:29 ms10 kernel: ehci_set_hw_power: Async is active
Jun  6 21:22:29 ms10 kernel: ehci_set_hw_power: Periodic is active
Jun  6 21:22:29 ms10 kernel: ehci_set_hw_power:
Jun  6 21:22:29 ms10 kernel: ehci_set_hw_power: Periodic is active
Jun  6 21:22:29 ms10 kernel: ehci_set_hw_power:
Jun  6 21:22:29 ms10 kernel: ehci_set_hw_power: Async is active
Jun  6 21:22:29 ms10 kernel: ehci_set_hw_power: Periodic is active
>How-To-Repeat:

>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted: