From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mout.freenet.de (mout.freenet.de [194.97.196.12]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E52B73101C0; Fri, 8 May 2026 19:58:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=194.97.196.12 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778270307; cv=none; b=iX7PknqFIllIU3fxXxYnyH3irWpIIMDmszcM5e+XxTZRC5LW3V9EpM2MYr7kwXw3JRhSz4vhUg7HaI80SOd4A39zn2cTo8ZMMx5gBvMORELWV5MIZBhDxiA3fvCxWH5OkIyKPH2zZjZ69EL1A6JcCjO3Z0RG/rSiHWbSWjOIwag= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778270307; c=relaxed/simple; bh=NRxUU5++DOjW4qghbnifPpm4RQu+OpJgb2kYLhaSVDI=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=hk6iP6du+4DLa0jDKRpxKxx/EFgHubr9SpN2y2vVa0QGDptuuY8/a3iAGSzZrgRhiT4Z9McqTGJ9R7/nHgQNvoIBxjBd4eGUKK2hzdA5nA527lmXrx7mJngMu1DFuSRfRDRos8fhCyyLACD8CuNFAMeV0TT5ecxAU5unC/sx0to= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=freenet.de; spf=pass smtp.mailfrom=freenet.de; dkim=pass (2048-bit key) header.d=freenet.de header.i=@freenet.de header.b=INDh+JnO; arc=none smtp.client-ip=194.97.196.12 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=freenet.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=freenet.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=freenet.de header.i=@freenet.de header.b="INDh+JnO" Received: from [2001:748:400:3319::4] (helo=sub6.mail.fnrz.de) by mout4.mail.fnrz.de with esmtpa (ID viktor.jaegerskuepper@freenet.de) (port 25) (Exim 4.98.2 #2) id 1wLRFz-0000000G4JC-3c5T; Fri, 08 May 2026 21:53:07 +0200 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=freenet.de; s=mjaymdexmjqk; h=Content-Transfer-Encoding:Content-Type:In-Reply-To:From: References:Cc:To:Subject:MIME-Version:Date:Message-ID:Sender:Reply-To: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID; bh=ZgrgaJSrLdqBuXxCYuXsxG61gEvs6LJRIf6jptm4fRs=; b=INDh+JnO6CuiwsufRHYenGbDCJ yEkAj0eICtm+VAvtGujopgNmqxhoVBonuRQnXcgx3ri09a7XdH3ao1R32Lz4BtpwULleJbn6Imggo cITYS7iHNIHAhzSWl2/5WEED2NReHzRf1qWynnlngPUqQcdL5z6/Z+fw/AzInw5t+VRDQWbDyasFZ /biFY1N1WQIDX0FPqzg1zRKNEu/HOjJZr+c5kKm40VZ45dHA5z2e7DHl666huGZqfdQohOcsimRE5 i3yLjxZsmDLlN+jZXz/7zU8C3mpNwqxjlGf636XpEyC8dShptImFD7CMrhD1YMoRoRBOInB7ZpF48 PJ5Mr/dA==; Received: from [2a02:8071:a85:f020:8898:558d:181a:86c2] (port=55878 helo=[127.0.0.1]) by sub6.mail.fnrz.de with esmtpsa (ID viktor.jaegerskuepper@freenet.de) (TLS1.3:ECDHE_X25519__RSA_PSS_RSAE_SHA256__AES_128_GCM:128) (port 465) (Exim 4.96 #2) id 1wLRFz-002R0n-2D; Fri, 08 May 2026 21:53:07 +0200 Message-ID: <5fa4c763-bf94-4507-8667-f3dcb032b2e0@freenet.de> Date: Fri, 8 May 2026 21:53:26 +0200 Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [REGRESSION] CPU running at fixed frequency (~1.7 GHz) with kernel 7.1-rc1 To: Mario Limonciello Cc: linux-pm@vger.kernel.org, regressions@lists.linux.dev, Huang Rui , Thorsten Leemhuis References: <14a87c99-785c-4b16-bfce-35ecbf053448@freenet.de> <8654f7a1-5023-4874-a90a-5332ba6301b3@freenet.de> <33a693a8-a460-49b7-83cb-1ab7b66ce69e@freenet.de> <46eaec7d-a359-40c8-9c5c-57ecc3506805@leemhuis.info> <8c39f42a-f024-4f05-8d77-a95e7ca1c702@amd.com> Content-Language: en-US From: =?UTF-8?B?VmlrdG9yIErDpGdlcnNrw7xwcGVy?= In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-FN-MUUID: 177826998730D5C55F625AO X-Scan-TS: Fri, 08 May 2026 21:53:07 +0200 Am 08.05.26 um 21:01 schrieb Mario Limonciello: > On 5/8/26 13:56, Viktor Jägersküpper wrote: >> Am 08.05.26 um 14:57 schrieb Mario Limonciello: >>> On 5/8/26 04:31, Thorsten Leemhuis wrote: >>>> * there is a whole patch series with fixes for the culprit: >>>> https://lore.kernel.org/all/20260508051748.10484-1-kprateek.nayak@amd.com/ >>>> >>> >>> I don't think any of these will help; but that would a fine surprise if so. >>> >> >> This patch series fixes the bug when I boot with "amd_dynamic_epp=disable" (I built >> the kernel with CONFIG_X86_AMD_PSTATE_DYNAMIC_EPP=y). I didn't bisect to find out >> which patch contains the partial fix, but I can do this if it helps. >> >> If you need further information (acpidump and/or output from amd-pstate tool), just >> tell me. > > When you have dynamic EPP enabled it sets up platform profile.  With that series in place does changing platform profile help? Strangely *changing* the power profile (to any value) seems to enable the expected boosting behaviour, but since I can only do that when the PC has finished booting, the cores still seem to be stuck at ~1.7 GHz until then. Unless I am doing something stupid, that's not how it's supposed to work, I guess? >> Last week I got this output after applying a debugging patch from you: >>>> On 4/29/26 20:34, Viktor Jägersküpper wrote: >>>>> Am 29.04.26 um 19:14 schrieb Mario Limonciello: >>>>>> >>>>>> OK thanks.  Here is a debugging patch that should show what's happening in the new paths from e30ca6dd5345c5b8ba05f346a8e81105352fe571 so we can confirm root cause on your system. >>>>> >>>>> These are the dmesg lines concerning amd-pstate: >>>>> [    0.845044] amd_pstate: amd_pstate: CPU 0: calling amd_pstate_set_dynamic_epp (current_profile=3) >>>>> [    0.845047] amd_pstate: amd_pstate: CPU 0: get_balanced_epp: power_supply_is_system_supplied=1, returning EPP=0x0 (ac=0x0, dc=0x80) >>>>> [    0.845059] amd_pstate: amd_pstate: CPU 0: platform_profile_register succeeded >>>>> [    0.845060] amd_pstate: amd_pstate: CPU 0: registering power supply notifier >>>>> [    0.849046] amd_pstate: amd_pstate: CPU 1: calling amd_pstate_set_dynamic_epp (current_profile=3) >>>>> [    0.849047] amd_pstate: amd_pstate: CPU 1: get_balanced_epp: power_supply_is_system_supplied=1, returning EPP=0x0 (ac=0x0, dc=0x80) >>>>> [    0.849058] amd_pstate: amd_pstate: CPU 1: platform_profile_register succeeded >>>>> [    0.849059] amd_pstate: amd_pstate: CPU 1: registering power supply notifier >>>>> [    0.853043] amd_pstate: amd_pstate: CPU 2: calling amd_pstate_set_dynamic_epp (current_profile=3) >>>>> [    0.853044] amd_pstate: amd_pstate: CPU 2: get_balanced_epp: power_supply_is_system_supplied=1, returning EPP=0x0 (ac=0x0, dc=0x80) >>>>> [    0.853054] amd_pstate: amd_pstate: CPU 2: platform_profile_register succeeded >>>>> [    0.853054] amd_pstate: amd_pstate: CPU 2: registering power supply notifier >>>>> [    0.857043] amd_pstate: amd_pstate: CPU 3: calling amd_pstate_set_dynamic_epp (current_profile=3) >>>>> [    0.857044] amd_pstate: amd_pstate: CPU 3: get_balanced_epp: power_supply_is_system_supplied=1, returning EPP=0x0 (ac=0x0, dc=0x80) >>>>> [    0.857054] amd_pstate: amd_pstate: CPU 3: platform_profile_register succeeded >>>>> [    0.857054] amd_pstate: amd_pstate: CPU 3: registering power supply notifier >>>>> [    0.861045] amd_pstate: amd_pstate: CPU 4: calling amd_pstate_set_dynamic_epp (current_profile=3) >>>>> [    0.861046] amd_pstate: amd_pstate: CPU 4: get_balanced_epp: power_supply_is_system_supplied=1, returning EPP=0x0 (ac=0x0, dc=0x80) >>>>> [    0.861056] amd_pstate: amd_pstate: CPU 4: platform_profile_register succeeded >>>>> [    0.861057] amd_pstate: amd_pstate: CPU 4: registering power supply notifier >>>>> [    0.865044] amd_pstate: amd_pstate: CPU 5: calling amd_pstate_set_dynamic_epp (current_profile=3) >>>>> [    0.865046] amd_pstate: amd_pstate: CPU 5: get_balanced_epp: power_supply_is_system_supplied=1, returning EPP=0x0 (ac=0x0, dc=0x80) >>>>> [    0.865057] amd_pstate: amd_pstate: CPU 5: platform_profile_register succeeded >>>>> [    0.865058] amd_pstate: amd_pstate: CPU 5: registering power supply notifier >>>>> [    0.870044] amd_pstate: amd_pstate: CPU 6: calling amd_pstate_set_dynamic_epp (current_profile=3) >>>>> [    0.870046] amd_pstate: amd_pstate: CPU 6: get_balanced_epp: power_supply_is_system_supplied=1, returning EPP=0x0 (ac=0x0, dc=0x80) >>>>> [    0.870058] amd_pstate: amd_pstate: CPU 6: platform_profile_register succeeded >>>>> [    0.870058] amd_pstate: amd_pstate: CPU 6: registering power supply notifier >>>>> [    0.874044] amd_pstate: amd_pstate: CPU 7: calling amd_pstate_set_dynamic_epp (current_profile=3) >>>>> [    0.874045] amd_pstate: amd_pstate: CPU 7: get_balanced_epp: power_supply_is_system_supplied=1, returning EPP=0x0 (ac=0x0, dc=0x80) >>>>> [    0.874056] amd_pstate: amd_pstate: CPU 7: platform_profile_register succeeded >>>>> [    0.874057] amd_pstate: amd_pstate: CPU 7: registering power supply notifier >>>>> [    0.878045] amd_pstate: amd_pstate: CPU 8: calling amd_pstate_set_dynamic_epp (current_profile=3) >>>>> [    0.878046] amd_pstate: amd_pstate: CPU 8: get_balanced_epp: power_supply_is_system_supplied=1, returning EPP=0x0 (ac=0x0, dc=0x80) >>>>> [    0.878055] amd_pstate: amd_pstate: CPU 8: platform_profile_register succeeded >>>>> [    0.878056] amd_pstate: amd_pstate: CPU 8: registering power supply notifier >>>>> [    0.882045] amd_pstate: amd_pstate: CPU 9: calling amd_pstate_set_dynamic_epp (current_profile=3) >>>>> [    0.882046] amd_pstate: amd_pstate: CPU 9: get_balanced_epp: power_supply_is_system_supplied=1, returning EPP=0x0 (ac=0x0, dc=0x80) >>>>> [    0.882055] amd_pstate: amd_pstate: CPU 9: platform_profile_register succeeded >>>>> [    0.882056] amd_pstate: amd_pstate: CPU 9: registering power supply notifier >>>>> [    0.886045] amd_pstate: amd_pstate: CPU 10: calling amd_pstate_set_dynamic_epp (current_profile=3) >>>>> [    0.886046] amd_pstate: amd_pstate: CPU 10: get_balanced_epp: power_supply_is_system_supplied=1, returning EPP=0x0 (ac=0x0, dc=0x80) >>>>> [    0.886055] amd_pstate: amd_pstate: CPU 10: platform_profile_register succeeded >>>>> [    0.886056] amd_pstate: amd_pstate: CPU 10: registering power supply notifier >>>>> [    0.890045] amd_pstate: amd_pstate: CPU 11: calling amd_pstate_set_dynamic_epp (current_profile=3) >>>>> [    0.890046] amd_pstate: amd_pstate: CPU 11: get_balanced_epp: power_supply_is_system_supplied=1, returning EPP=0x0 (ac=0x0, dc=0x80) >>>>> [    0.890056] amd_pstate: amd_pstate: CPU 11: platform_profile_register succeeded >>>>> [    0.890056] amd_pstate: amd_pstate: CPU 11: registering power supply notifier >>>>> [    0.894046] amd_pstate: amd_pstate: CPU 12: calling amd_pstate_set_dynamic_epp (current_profile=3) >>>>> [    0.894047] amd_pstate: amd_pstate: CPU 12: get_balanced_epp: power_supply_is_system_supplied=1, returning EPP=0x0 (ac=0x0, dc=0x80) >>>>> [    0.894056] amd_pstate: amd_pstate: CPU 12: platform_profile_register succeeded >>>>> [    0.894057] amd_pstate: amd_pstate: CPU 12: registering power supply notifier >>>>> [    0.898046] amd_pstate: amd_pstate: CPU 13: calling amd_pstate_set_dynamic_epp (current_profile=3) >>>>> [    0.898047] amd_pstate: amd_pstate: CPU 13: get_balanced_epp: power_supply_is_system_supplied=1, returning EPP=0x0 (ac=0x0, dc=0x80) >>>>> [    0.898055] amd_pstate: amd_pstate: CPU 13: platform_profile_register succeeded >>>>> [    0.898056] amd_pstate: amd_pstate: CPU 13: registering power supply notifier >>>>> [    0.902046] amd_pstate: amd_pstate: CPU 14: calling amd_pstate_set_dynamic_epp (current_profile=3) >>>>> [    0.902048] amd_pstate: amd_pstate: CPU 14: get_balanced_epp: power_supply_is_system_supplied=1, returning EPP=0x0 (ac=0x0, dc=0x80) >>>>> [    0.902059] amd_pstate: amd_pstate: CPU 14: platform_profile_register succeeded >>>>> [    0.902059] amd_pstate: amd_pstate: CPU 14: registering power supply notifier >>>>> [    0.906046] amd_pstate: amd_pstate: CPU 15: calling amd_pstate_set_dynamic_epp (current_profile=3) >>>>> [    0.906048] amd_pstate: amd_pstate: CPU 15: get_balanced_epp: power_supply_is_system_supplied=1, returning EPP=0x0 (ac=0x0, dc=0x80) >>>>> [    0.906060] amd_pstate: amd_pstate: CPU 15: platform_profile_register succeeded >>>>> [    0.906060] amd_pstate: amd_pstate: CPU 15: registering power supply notifier >>>>> [    0.910046] amd_pstate: amd_pstate: CPU 16: calling amd_pstate_set_dynamic_epp (current_profile=3) >>>>> [    0.910048] amd_pstate: amd_pstate: CPU 16: get_balanced_epp: power_supply_is_system_supplied=1, returning EPP=0x0 (ac=0x0, dc=0x80) >>>>> [    0.910058] amd_pstate: amd_pstate: CPU 16: platform_profile_register succeeded >>>>> [    0.910059] amd_pstate: amd_pstate: CPU 16: registering power supply notifier >>>>> [    0.914047] amd_pstate: amd_pstate: CPU 17: calling amd_pstate_set_dynamic_epp (current_profile=3) >>>>> [    0.914048] amd_pstate: amd_pstate: CPU 17: get_balanced_epp: power_supply_is_system_supplied=1, returning EPP=0x0 (ac=0x0, dc=0x80) >>>>> [    0.914059] amd_pstate: amd_pstate: CPU 17: platform_profile_register succeeded >>>>> [    0.914060] amd_pstate: amd_pstate: CPU 17: registering power supply notifier >>>>> [    0.918049] amd_pstate: amd_pstate: CPU 18: calling amd_pstate_set_dynamic_epp (current_profile=3) >>>>> [    0.918051] amd_pstate: amd_pstate: CPU 18: get_balanced_epp: power_supply_is_system_supplied=1, returning EPP=0x0 (ac=0x0, dc=0x80) >>>>> [    0.918081] amd_pstate: amd_pstate: CPU 18: platform_profile_register succeeded >>>>> [    0.918082] amd_pstate: amd_pstate: CPU 18: registering power supply notifier >>>>> [    0.922049] amd_pstate: amd_pstate: CPU 19: calling amd_pstate_set_dynamic_epp (current_profile=3) >>>>> [    0.922051] amd_pstate: amd_pstate: CPU 19: get_balanced_epp: power_supply_is_system_supplied=1, returning EPP=0x0 (ac=0x0, dc=0x80) >>>>> [    0.922070] amd_pstate: amd_pstate: CPU 19: platform_profile_register succeeded >>>>> [    0.922071] amd_pstate: amd_pstate: CPU 19: registering power supply notifier >>>>> [    0.926049] amd_pstate: amd_pstate: CPU 20: calling amd_pstate_set_dynamic_epp (current_profile=3) >>>>> [    0.926052] amd_pstate: amd_pstate: CPU 20: get_balanced_epp: power_supply_is_system_supplied=1, returning EPP=0x0 (ac=0x0, dc=0x80) >>>>> [    0.926073] amd_pstate: amd_pstate: CPU 20: platform_profile_register succeeded >>>>> [    0.926074] amd_pstate: amd_pstate: CPU 20: registering power supply notifier >>>>> [    0.930049] amd_pstate: amd_pstate: CPU 21: calling amd_pstate_set_dynamic_epp (current_profile=3) >>>>> [    0.930052] amd_pstate: amd_pstate: CPU 21: get_balanced_epp: power_supply_is_system_supplied=1, returning EPP=0x0 (ac=0x0, dc=0x80) >>>>> [    0.930071] amd_pstate: amd_pstate: CPU 21: platform_profile_register succeeded >>>>> [    0.930072] amd_pstate: amd_pstate: CPU 21: registering power supply notifier >>>>> [    0.934050] amd_pstate: amd_pstate: CPU 22: calling amd_pstate_set_dynamic_epp (current_profile=3) >>>>> [    0.934052] amd_pstate: amd_pstate: CPU 22: get_balanced_epp: power_supply_is_system_supplied=1, returning EPP=0x0 (ac=0x0, dc=0x80) >>>>> [    0.934072] amd_pstate: amd_pstate: CPU 22: platform_profile_register succeeded >>>>> [    0.934073] amd_pstate: amd_pstate: CPU 22: registering power supply notifier >>>>> [    0.938050] amd_pstate: amd_pstate: CPU 23: calling amd_pstate_set_dynamic_epp (current_profile=3) >>>>> [    0.938052] amd_pstate: amd_pstate: CPU 23: get_balanced_epp: power_supply_is_system_supplied=1, returning EPP=0x0 (ac=0x0, dc=0x80) >>>>> [    0.938073] amd_pstate: amd_pstate: CPU 23: platform_profile_register succeeded >>>>> [    0.938074] amd_pstate: amd_pstate: CPU 23: registering power supply notifier >>>>> >>>>> >>>> >>> >> >