From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 22A293F0775 for ; Wed, 6 May 2026 18:10:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778091036; cv=none; b=rVTF6qFhUd2XIbNO5NnErVVck+PX6cFxVy5j4P6ROs+q4syeoX3djVoHAsX7XjAtPwH0vm4HjEWnAXeEPevZu6P7tG9eYTryH8Vo/Tsph9zo9co4Lp4Phig78qBPWuxfJUeLogfYh6jsnWV5/W0IYMMyZeeDji8On9q9GzgN958= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778091036; c=relaxed/simple; bh=jd31RYFzQU0URhnPGlL2rbPUQervEbd6tI7V3VQntLE=; h=From:To:Subject:Date:Message-ID:Content-Type:MIME-Version; b=Oxp1Ow31CWXMUm96xSfbC/4/PRYzDRrg2x0ktJYCRHG6h18LdUq1ATSu05QLsN9AGd8n51aHYHX6o4qNY4E45vB4ZicHvcw6AJVTex2BPDQRRYbBI5tuRLoXmpfqILYAscQp0l6dkDh+7rwhXrKmrhAtp4RXqgvAyUlWEUJGefQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=dVuseEiz; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="dVuseEiz" Received: by smtp.kernel.org (Postfix) with ESMTPS id B6175C2BCB0 for ; Wed, 6 May 2026 18:10:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1778091035; bh=jd31RYFzQU0URhnPGlL2rbPUQervEbd6tI7V3VQntLE=; h=From:To:Subject:Date:From; b=dVuseEiz970PqX7U/1OoCUlM6VcAs14mkadzGcCzjJrBAf0oo0+7wkbbyuN90SvuJ T3nuDnzk9oOR4Axnq7dKDTrXl5HFbxtbjvDgtu9la5wusM2z4stsSN+bkjzaQ11cO+ nV9wSdeK3P+tR1a5e4y6JBBO64XrFHzEB1w1iGdlls69E0BnKN6A81KmcMEGWEtIBZ OcLTrUxI3zK5KlOvsYnPWxMvRIM+t115Q05ztCVn8SN8Aoc+QxGimKuFG8mBHXUmn4 eyb3bHK/MkO4exPl40TpdKgi5OBEMIH5HK8rEh7GIqNkxY9vryIG0kin4RsP9itOcr xjsWaFElL0DYQ== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id AA4A3C41616; Wed, 6 May 2026 18:10:35 +0000 (UTC) From: bugzilla-daemon@kernel.org To: linux-pm@vger.kernel.org Subject: [Bug 221473] New: amd-pstate dynamic EPP regression on Ryzen 5 3600 Date: Wed, 06 May 2026 18:10:35 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new 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: stuartmeckle@gmail.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: bug_id short_desc product version cf_kernel_version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter cc cf_regression cf_bisect_commit attachments.created Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugzilla.kernel.org/ Auto-Submitted: auto-generated Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 https://bugzilla.kernel.org/show_bug.cgi?id=3D221473 Bug ID: 221473 Summary: amd-pstate dynamic EPP regression on Ryzen 5 3600 Product: Power Management Version: 2.5 Kernel Version: 7.1.0-rc2 Hardware: AMD OS: Linux Status: NEW Severity: normal Priority: P3 Component: cpufreq Assignee: linux-pm@vger.kernel.org Reporter: stuartmeckle@gmail.com CC: mario.limonciello@amd.com Regression: Yes Bisected e30ca6dd5345c5b8ba05f346a8e81105352fe571 commit-id: Created attachment 310042 --> https://bugzilla.kernel.org/attachment.cgi?id=3D310042&action=3Dedit dmesg and config amd-pstate dynamic EPP regression on Ryzen 5 3600 My CPU which normally boosts to 4.0GHz (PBO enabled) was stuck at 1.7GHz un= der full load. Same result with CONFIG_X86_AMD_PSTATE_DYNAMIC_EPP set to either= 'y' or 'n'. I bisected to this commit: commit e30ca6dd5345c5b8ba05f346a8e81105352fe571 Author: Mario Limonciello (AMD) cpufreq/amd-pstate: Add dynamic energy performance preference Arch Linux Linux version 7.1.0-rc2-00099-gadc1e5c6203c (stuart@romano) (gcc (GCC) 16.1= .1 20260430, GNU ld (GNU Binutils) 2.46.0) #1 SMP PREEMPT_DYNAMIC Wed May 6 15:30:26 UTC 2026 Gigabyte Technology Co., Ltd. B450M DS3H/B450M DS3H-CF, BIOS F67 10/28/2025 Advanced Micro Devices, Inc. [AMD/ATI] Navi 44 [Radeon RX 9060 XT] (rev c0) AMD Ryzen 5 3600 6-Core Processor 32GB DDR4 DRAM F4-3000C16-8GVRB CONFIG_CPU_FREQ_DEFAULT_GOV_SCHEDUTIL=3Dy CONFIG_CPU_FREQ_GOV_SCHEDUTIL=3Dy CONFIG_X86_AMD_PSTATE=3Dy CONFIG_X86_AMD_PSTATE_DEFAULT_MODE=3D3 CONFIG_X86_AMD_PSTATE_DYNAMIC_EPP=3Dy CONFIG_X86_AMD_PSTATE_UT=3Dm =3D=3D> /sys/devices/system/cpu/cpu0/cpufreq/affected_cpus <=3D=3D 0 =3D=3D> /sys/devices/system/cpu/cpu0/cpufreq/amd_pstate_highest_perf <=3D=3D 166 =3D=3D> /sys/devices/system/cpu/cpu0/cpufreq/amd_pstate_hw_prefcore <=3D=3D enabled =3D=3D> /sys/devices/system/cpu/cpu0/cpufreq/amd_pstate_lowest_nonlinear_fr= eq <=3D=3D 1723944 =3D=3D> /sys/devices/system/cpu/cpu0/cpufreq/amd_pstate_max_freq <=3D=3D 4208451 =3D=3D> /sys/devices/system/cpu/cpu0/cpufreq/amd_pstate_prefcore_ranking <= =3D=3D 171 =3D=3D> /sys/devices/system/cpu/cpu0/cpufreq/boost <=3D=3D 1 =3D=3D> /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_avg_freq <=3D=3D 1723944 =3D=3D> /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq <=3D=3D 4208451 =3D=3D> /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq <=3D=3D 557747 =3D=3D> /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_transition_latency <= =3D=3D 0 =3D=3D> /sys/devices/system/cpu/cpu0/cpufreq/energy_performance_available_preferenc= es <=3D=3D default performance balance_performance balance_power power custom =3D=3D> /sys/devices/system/cpu/cpu0/cpufreq/energy_performance_preference = <=3D=3D performance =3D=3D> /sys/devices/system/cpu/cpu0/cpufreq/related_cpus <=3D=3D 0 =3D=3D> /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors <= =3D=3D performance powersave =3D=3D> /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq <=3D=3D 1736801 =3D=3D> /sys/devices/system/cpu/cpu0/cpufreq/scaling_driver <=3D=3D amd-pstate-epp =3D=3D> /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor <=3D=3D powersave =3D=3D> /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq <=3D=3D 4208451 =3D=3D> /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq <=3D=3D 1723944 =3D=3D> /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed <=3D=3D For comparison, here are the same settings on kernel 7.0.3-arch1-2: =3D=3D> /sys/devices/system/cpu/cpu0/cpufreq/affected_cpus <=3D=3D 0 =3D=3D> /sys/devices/system/cpu/cpu0/cpufreq/amd_pstate_highest_perf <=3D=3D 166 =3D=3D> /sys/devices/system/cpu/cpu0/cpufreq/amd_pstate_hw_prefcore <=3D=3D enabled =3D=3D> /sys/devices/system/cpu/cpu0/cpufreq/amd_pstate_lowest_nonlinear_fr= eq <=3D=3D 1723944 =3D=3D> /sys/devices/system/cpu/cpu0/cpufreq/amd_pstate_max_freq <=3D=3D 4208451 =3D=3D> /sys/devices/system/cpu/cpu0/cpufreq/amd_pstate_prefcore_ranking <= =3D=3D 171 =3D=3D> /sys/devices/system/cpu/cpu0/cpufreq/boost <=3D=3D 1 =3D=3D> /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_avg_freq <=3D=3D 3656148 =3D=3D> /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq <=3D=3D 4208451 =3D=3D> /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq <=3D=3D 557747 =3D=3D> /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_transition_latency <= =3D=3D 0 =3D=3D> /sys/devices/system/cpu/cpu0/cpufreq/energy_performance_available_preferenc= es <=3D=3D default performance balance_performance balance_power power =3D=3D> /sys/devices/system/cpu/cpu0/cpufreq/energy_performance_preference = <=3D=3D balance_performance =3D=3D> /sys/devices/system/cpu/cpu0/cpufreq/related_cpus <=3D=3D 0 =3D=3D> /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors <= =3D=3D performance powersave =3D=3D> /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq <=3D=3D 3693566 =3D=3D> /sys/devices/system/cpu/cpu0/cpufreq/scaling_driver <=3D=3D amd-pstate-epp =3D=3D> /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor <=3D=3D powersave =3D=3D> /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq <=3D=3D 4208451 =3D=3D> /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq <=3D=3D 1723944 =3D=3D> /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed <=3D=3D --=20 You may reply to this email to add a comment. 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