From owner-freebsd-bugs@freebsd.org Tue Jan 21 20:16:23 2020 Return-Path: Delivered-To: freebsd-bugs@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 861A9221B0D for ; Tue, 21 Jan 2020 20:16:23 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.nyi.freebsd.org (mailman.nyi.freebsd.org [IPv6:2610:1c1:1:606c::50:13]) by mx1.freebsd.org (Postfix) with ESMTP id 482KYg31yVz40V8 for ; Tue, 21 Jan 2020 20:16:23 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.nyi.freebsd.org (Postfix) id 6607B221B0C; Tue, 21 Jan 2020 20:16:23 +0000 (UTC) Delivered-To: bugs@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 65CE1221B0B for ; Tue, 21 Jan 2020 20:16:23 +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) server-signature RSA-PSS (4096 bits) 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 482KYg27pMz40V7 for ; Tue, 21 Jan 2020 20:16:23 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 425181A1C0 for ; Tue, 21 Jan 2020 20:16:23 +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 00LKGNko079879 for ; Tue, 21 Jan 2020 20:16:23 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 00LKGNHi079878 for bugs@FreeBSD.org; Tue, 21 Jan 2020 20:16:23 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: bugs@FreeBSD.org Subject: [Bug 234455] CPU frequency scaling fails for multiple cores Date: Tue, 21 Jan 2020 20:16:22 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 12.0-RELEASE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: cem@freebsd.org X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: 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-bugs@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 21 Jan 2020 20:16:23 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D234455 --- Comment #5 from Conrad Meyer --- @Dave, did you try debug.acpi.disabled=3D"thermal"? It seems bizarre that = the default dev.cpu.0.freq is 800. Is that the case at boot, or was your initi= al description after running, say, powerd? It might be that Coffeelake does n= ot really support est and needs Intel Speed Shift instead. That is not yet in tree but there is a work-in-progress patch: https://reviews.freebsd.org/D18= 028 @Erich, I suspect these are unrelated issues in that a different cpufreq dr= iver is used on Zen (hwpstate) and Intel (est). But maybe there is some relatio= n. I do not recommend powerd and would suggest disabling it. In fact, we shou= ld probably remove it from FreeBSD. It is extremely legacy and only really wo= rks correctly on ancient single core devices. I also don't recommend manual p-state setting via sysctl. Modern CPUs do a fantastic job of power saving with C states alone =E2=80=94 P-state throttl= ing doesn't get you much anymore. --=20 You are receiving this mail because: You are the assignee for the bug.=