From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C4A18E7D0A8 for ; Thu, 21 Sep 2023 20:21:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231735AbjIUUVk (ORCPT ); Thu, 21 Sep 2023 16:21:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49172 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231552AbjIUUVR (ORCPT ); Thu, 21 Sep 2023 16:21:17 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CFB59400D8 for ; Thu, 21 Sep 2023 10:15:03 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPS id 962A4C433C9 for ; Thu, 21 Sep 2023 05:25:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1695273907; bh=c58xEsygUdws9xzfrFKFJkrkCVDiywjPhuXf1PYl/vA=; h=From:To:Subject:Date:In-Reply-To:References:From; b=EhnJoo8dWXvbEBZb0mt1KGfORDsoHM5HE9EnX+rr+WNVQ5M32GvpewRzTh+/W3tmc 3hYzFqAe3MirrC/ukJDC7is2TMMm2GFeIiZX2HiCqU8twjX/1OChB63vmD0O8dFm6d oLx5iJzM5T9cTPDb6V4sJCQylnUKi3JVd869RN6CbthhuLH0UTofdwBPKaSve4IgI1 GHW0GXUhoK+TJvM4g87uH4edy2KPLWTeTbs9ML1PWh+O4ulnt3R/hluR0q0dV31TKQ +SVGV1gL7plOlaaSHjS4SWVQDwPb7GCpeFL3HAEcbjxT2NY0mXYNz/5nXQCLmX18f2 ouVXUHLm0vxqQ== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id 7CE5EC53BD0; Thu, 21 Sep 2023 05:25:07 +0000 (UTC) From: bugzilla-daemon@kernel.org To: linux-pm@vger.kernel.org Subject: [Bug 217931] amd-pstate lacks crucial features: CPU frequency and boost control Date: Thu, 21 Sep 2023 05:25:07 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Power Management X-Bugzilla-Component: cpufreq X-Bugzilla-Version: 2.5 X-Bugzilla-Keywords: X-Bugzilla-Severity: high X-Bugzilla-Who: Perry.Yuan@amd.com X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: linux-pm@vger.kernel.org X-Bugzilla-Flags: 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://bugzilla.kernel.org/ Auto-Submitted: auto-generated MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org https://bugzilla.kernel.org/show_bug.cgi?id=3D217931 Perry Yuan(AMD) (Perry.Yuan@amd.com) changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |Perry.Yuan@amd.com --- Comment #4 from Perry Yuan(AMD) (Perry.Yuan@amd.com) --- (In reply to Artem S. Tashkinov from comment #0) > Created attachment 305131 [details] > Power Options: Processor Power Management in Windows >=20 > It would be really great if amd-pstate had a feature parity with > acpi-cpufreq, namely >=20 > 1) Being able to set operating frequencies (maximum, minimum and > user-defined) >=20 > 2) Being able to enable/disable boost >=20 > Currently both features are not available and frequency control is simply > ignored (bug 215800). >=20 > Rationale: >=20 > 1) This is required for benchmarking and proper temperature control. Boost > frequencies are subject to multiple limitations (power in watts, amperage, > voltage, temperature, BIOS limitations) and can change depending on the > workload. Setting a low enough frequency allows to run benchmarks in the > controlled environment and get proper data. >=20 > Windows allows to do that easily, see the attached screenshot. >=20 > 2) Disabling boost is an easy option to subdue operating temperatures tho= ugh > if the previous issue is tackled, it's not really needed. Thanks for the suggestion. There are two modes for amd pstate driver, one passive, and another active mode, the passive mode already has the boost control feature. # cat /sys/devices/system/cpu/cpufreq/boost 1 I have raised this requestion and will get active mode supported with a new patch. Perry. --=20 You may reply to this email to add a comment. You are receiving this mail because: You are the assignee for the bug.=