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Subject: [Bug 219220] syscalls (ioctls) on USB devices are very slow
Date: Thu, 11 May 2017 12:31:27 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D219220

--- Comment #9 from Matthias Apitz <guru@unixarea.de> ---
$ dmesg | grep usb
usbus0 on xhci0
usbus0: 5.0Gbps Super Speed USB v3.0
usbus1: EHCI version 1.0
usbus1 on ehci0
usbus1: 480Mbps High Speed USB v2.0
ugen1.1: <Intel EHCI root HUB> at usbus1
ugen0.1: <0x8086 XHCI root HUB> at usbus0
uhub0: <Intel EHCI root HUB, class 9/0, rev 2.00/1.00, addr 1> on usbus1
uhub1: <0x8086 XHCI root HUB, class 9/0, rev 3.00/1.00, addr 1> on usbus0
ugen0.2: <SunplusIT Inc HD WebCam> at usbus0
ugen1.2: <vendor 0x8087 product 0x8000> at usbus1
uhub2: <vendor 0x8087 product 0x8000, class 9/0, rev 2.00/0.04, addr 2> on
usbus1
ugen0.3: <vendor 0x0489 product 0xe056> at usbus0
ugen0.4: <Logitech USB Optical Mouse> at usbus0
ums0: <Logitech USB Optical Mouse, class 0/0, rev 2.00/63.00, addr 3> on us=
bus0
ugen0.4: <Logitech USB Optical Mouse> at usbus0 (disconnected)
ugen0.4: <Logitech USB Optical Mouse> at usbus0
ums0: <Logitech USB Optical Mouse, class 0/0, rev 2.00/63.00, addr 4> on us=
bus0
ugen0.4: <Logitech USB Optical Mouse> at usbus0 (disconnected)

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