From owner-freebsd-net@freebsd.org Thu Jun 18 17:52:52 2020 Return-Path: Delivered-To: freebsd-net@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id BD1573563D9 for ; Thu, 18 Jun 2020 17:52:52 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.nyi.freebsd.org (unknown [127.0.1.3]) by mx1.freebsd.org (Postfix) with ESMTP id 49nqKJ4b0Fz3XCf for ; Thu, 18 Jun 2020 17:52:52 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.nyi.freebsd.org (Postfix) id 9B4DD3563D8; Thu, 18 Jun 2020 17:52:52 +0000 (UTC) Delivered-To: net@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 9B0B035658C for ; Thu, 18 Jun 2020 17:52:52 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 49nqKJ3fRHz3X3F for ; Thu, 18 Jun 2020 17:52:52 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 772F1DC1D for ; Thu, 18 Jun 2020 17:52:52 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.5]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id 05IHqqFN047194 for ; Thu, 18 Jun 2020 17:52:52 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 05IHqqtB047193 for net@FreeBSD.org; Thu, 18 Jun 2020 17:52:52 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: net@FreeBSD.org Subject: [Bug 241958] Enable option TCPHPTS in the kernel causes a large % of interruptions if there is no HPET eventtimer in the system Date: Thu, 18 Jun 2020 17:52:51 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 12.1-RELEASE X-Bugzilla-Keywords: performance X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: thj@FreeBSD.org X-Bugzilla-Status: In Progress X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: rrs@FreeBSD.org X-Bugzilla-Flags: mfc-stable12? X-Bugzilla-Changed-Fields: cc Message-ID: In-Reply-To: References: 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-net@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 18 Jun 2020 17:52:52 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D241958 Tom Jones changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |thj@FreeBSD.org --- Comment #5 from Tom Jones --- I think I can reproduce this on 12-stable (r362275) With options TCPHPTS, I see a consistent interrupt load on a bhyve vm on a = 12.1 host. CPU: 0.0% user, 0.0% nice, 0.0% system, 8.0% interrupt, 91.9% idle Without TCPHPTS the vm is almost completely idle and there is no interrupt load. --=20 You are receiving this mail because: You are on the CC list for the bug.=