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=226968 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 $ systat -vmstat On the USB keyboard, hold down some key like 'a'. All is normal at this stage. 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. USB debug information (hw.usb.xhci.debug=16) does not show abnormal amounts of interrupts. With this bug, playing a fps-like game with keyboard controls is impossible since the whole game lags during irq storm. -- You are receiving this mail because: You are the assignee for the bug.
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