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 A0BD7C4332F for ; Mon, 9 May 2022 09:11:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233724AbiEIJNN (ORCPT ); Mon, 9 May 2022 05:13:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52080 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236094AbiEIImP (ORCPT ); Mon, 9 May 2022 04:42:15 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CB7611312A9 for ; Mon, 9 May 2022 01:38:18 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 3D47FB8108E for ; Mon, 9 May 2022 08:38:03 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPS id 043C7C385B0 for ; Mon, 9 May 2022 08:38:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1652085482; bh=Kz6CDz5kIbeJlC1q5ITghEDiaJwsNSBobnynDHjS1x4=; h=From:To:Subject:Date:In-Reply-To:References:From; b=jstWMA9PWVc1TCfJDIImiMQelNyMv9cGS5yAIHOUdXflOJGLk59PmGLEazJBWGJnp zH5+wciMuFJos4DA1fGc9/WOOLqhdsIl6unVkExOkLULiMQ1f+VP56NcaN4KDnPhhl acEXGXo5G0bTENtx1l5zMRHIPbJN4F27fuvZctVC85V8CbRzj/xEYgvh+YxlVx2Sjj Mhv5n+u2c4nY1CblFvbxmNqSyxm7ryQxtjhqYvfilnufsVo84iGqUSCKmdFo61L2jR a7KL4u0s9wfmV8VyHVJRWQyMEzAY1NPl1bwJhtuqM9ecVdlZH/f+VG/Isj4ZhoUSbm UR4n13OTF1LWg== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id E0569C05FD0; Mon, 9 May 2022 08:38:01 +0000 (UTC) From: bugzilla-daemon@kernel.org To: linux-pm@vger.kernel.org Subject: [Bug 215729] amd-pstate driver has a much higher idle power consumption for a desktop Zen 3 CPU Date: Mon, 09 May 2022 08:38:00 +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: normal X-Bugzilla-Who: aros@gmx.com X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P1 X-Bugzilla-Assigned-To: linux-pm@vger.kernel.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://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=3D215729 --- Comment #9 from Artem S. Tashkinov (aros@gmx.com) --- (In reply to Joe from comment #8) > Hello, >=20 > I reproduce this issue on my local.=20=20 >=20 > Your device (CPU family: 25, Model: 33) should be shared memory solution > with AMD P-state driver. Updating CPPC request with shared memory will ne= ed > more energy than writing MSR register directly. We are checking this iss= ue > now. >=20 > For ondemand governor, could you please try to reduce the sampling_rate a= nd > then check to energy consumption again? Thanks a lot! >=20 > Here is the command=20 >=20 > cd /sys/devices/system/cpu/cpufreq/ondemand > echo 50000 > sampling_rate >=20 > Thanks > Joe Changing sampling_rate from default 2000 to 50000 has improved the situation considerably but still acpi-cpufreq has a tiny better idle power consumptio= n. acpi-cpufreq: ~20W amd-pstate with default ondemand settings: ~23W amd-pstate with ondemand/sampling_rate=3D50k: ~21W Looks like the ondemand scheduler is not super efficient with the amd-pstate driver. --=20 You may reply to this email to add a comment. You are receiving this mail because: You are the assignee for the bug.=