Date: Tue, 27 Mar 2018 09:32:19 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-usb@FreeBSD.org Subject: [Bug 226968] IRQ storm on cpu0 timer when holding down key on USB keyboard Message-ID: <bug-226968-17@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D226968 Bug ID: 226968 Summary: IRQ storm on cpu0 timer when holding down key on USB keyboard Product: Base System Version: CURRENT Hardware: Any OS: Any Status: New Severity: Affects Some People Priority: --- Component: usb Assignee: freebsd-usb@FreeBSD.org Reporter: johalun0@gmail.com I noticed this when playing a first person shooter with keyboard controls. To verify, do the following: Open a terminal window (I used xfce4-terminal) Run=20 $ systat -vmstat On the USB keyboard, hold down some key like 'a'. All is normal at this stage.=20 Without releasing 'a', press and release another key, like 'b'. See the irqs on cpu0:timer go up to several hundred thousand. Release 'a' and it will go back to normal.=20 USB debug information (hw.usb.xhci.debug=3D16) does not show abnormal amoun= ts of interrupts. With this bug, playing a fps-like game with keyboard controls is impossible since the whole game lags during irq storm. --=20 You are receiving this mail because: You are the assignee for the bug.=
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