From owner-freebsd-usb@freebsd.org Tue Mar 27 09:32:20 2018 Return-Path: Delivered-To: freebsd-usb@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id B9621F652FE for ; Tue, 27 Mar 2018 09:32:20 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.ysv.freebsd.org (mxrelay.ysv.freebsd.org [IPv6:2001:1900:2254:206a::19:3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.ysv.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 53E48795C1 for ; Tue, 27 Mar 2018 09:32:20 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.ysv.freebsd.org (Postfix) with ESMTPS id 9FAF527E93 for ; Tue, 27 Mar 2018 09:32:19 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id w2R9WJcG070240 for ; Tue, 27 Mar 2018 09:32:19 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id w2R9WJG2070233 for freebsd-usb@FreeBSD.org; Tue, 27 Mar 2018 09:32:19 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f 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 Date: Tue, 27 Mar 2018 09:32:19 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: usb X-Bugzilla-Version: CURRENT X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: johalun0@gmail.com X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: freebsd-usb@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-usb@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: FreeBSD support for USB List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 27 Mar 2018 09:32:20 -0000 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.=