[Bug 219220] syscalls (ioctls) on USB devices are very slow

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=219220

--- Comment #16 from Matthias Apitz <guru at unixarea.de> ---
(In reply to Hans Petter Selasky from comment #15)

procstat -ak | grep usb

only show system processes:

root at c720-r314251:/home/guru # procstat -ak | grep usb > /tmp/usb
root at c720-r314251:/home/guru # ps ax | grep '14 ' >> /tmp/usb
root at c720-r314251:/home/guru # cat /tmp/usb
   14 100030 usb                 usbus0              mi_switch sleepq_switch
sleepq_wait _cv_wait usb_process fork_exit fork_trampoline 
   14 100031 usb                 usbus0              mi_switch sleepq_switch
sleepq_wait _cv_wait usb_process fork_exit fork_trampoline 
   14 100032 usb                 usbus0              mi_switch sleepq_switch
sleepq_wait _cv_wait usb_process fork_exit fork_trampoline 
   14 100033 usb                 usbus0              mi_switch sleepq_switch
sleepq_wait _cv_wait usb_process fork_exit fork_trampoline 
   14 100034 usb                 usbus0              mi_switch sleepq_switch
sleepq_wait _cv_wait usb_process fork_exit fork_trampoline 
   14 100041 usb                 usbus1              mi_switch sleepq_switch
sleepq_wait _cv_wait usb_process fork_exit fork_trampoline 
   14 100042 usb                 usbus1              mi_switch sleepq_switch
sleepq_wait _cv_wait usb_process fork_exit fork_trampoline 
   14 100043 usb                 usbus1              mi_switch sleepq_switch
sleepq_wait _cv_wait usb_process fork_exit fork_trampoline 
   14 100044 usb                 usbus1              mi_switch sleepq_switch
sleepq_wait _cv_wait usbd_do_request_flags usbd_req_get_port_status
uhub_read_port_status uhub_explore uhub_explore usb_bus_explore usb_process
fork_exit fork_trampoline 
   14 100045 usb                 usbus1              mi_switch sleepq_switch
sleepq_wait _cv_wait usb_process fork_exit fork_trampoline 
  12  -  WL    0:05,14 [intr]
  14  -  DL    0:00,04 [usb]
 614  -  Is    0:00,00 /sbin/ipmon -Ds
2238  1  R+    0:00,00 grep 14 

I also have deactivated any access to usb, like webcamd, hals, ...

what else?

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