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([2600:6c56:7d00:582f::64e]) by smtp.googlemail.com with ESMTPSA id 006d021491bc7-607e7cab6d8sm285152eaf.4.2025.05.01.14.33.25 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 01 May 2025 14:33:25 -0700 (PDT) Message-ID: Date: Thu, 1 May 2025 16:33:24 -0500 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v1 1/2] cpufreq: intel_pstate: Use CPPC to get scaling factors To: srinivas pandruvada , "Rafael J. Wysocki" , Linux PM Cc: LKML References: <1923452.tdWV9SEqCh@rjwysocki.net> <8476313.T7Z3S40VBb@rjwysocki.net> <53027db5-f750-4b6f-8ac5-a849dff2524b@gmail.com> Content-Language: en-US From: Russell Haley In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit On 5/1/25 12:13 PM, srinivas pandruvada wrote: > Hi Russell, > > > On Wed, 2025-04-30 at 20:28 -0500, Russell Haley wrote: >> >> On 12/5/24 5:39 AM, Rafael J. Wysocki wrote: >> >>> + * Compute the perf-to-frequency scaling factor for the >>> given CPU if >>> + * possible, unless it would be 0. >>> + */ >>> + if (!cppc_get_perf_caps(cpu, &cppc_perf) && >>> +     cppc_perf.nominal_perf && cppc_perf.nominal_freq) >>> + return div_u64(cppc_perf.nominal_freq * >>> KHZ_PER_MHZ, >>> +        cppc_perf.nominal_perf); >> > Can you dump the output of > > grep -r . /sys/devices/system/cpu/cpu*/acpi_cppc/ > > Thanks, > Srinivas Running microcode 0x117, CSME firmware 19.0.5.1948, shipped in BIOS 3.04 on an ASRock Z890 Pro-A Wifi motherboard: > /sys/devices/system/cpu/cpu0/acpi_cppc/feedback_ctrs:ref:127316207577 del:142876300546 > /sys/devices/system/cpu/cpu0/acpi_cppc/lowest_nonlinear_perf:36 > /sys/devices/system/cpu/cpu0/acpi_cppc/highest_perf:87 > /sys/devices/system/cpu/cpu0/acpi_cppc/nominal_freq:3900 > /sys/devices/system/cpu/cpu0/acpi_cppc/lowest_freq:0 > /sys/devices/system/cpu/cpu0/acpi_cppc/guaranteed_perf:63 > /sys/devices/system/cpu/cpu0/acpi_cppc/nominal_perf:62 > /sys/devices/system/cpu/cpu0/acpi_cppc/lowest_perf:1 > /sys/devices/system/cpu/cpu0/acpi_cppc/reference_perf:62 > /sys/devices/system/cpu/cpu0/acpi_cppc/wraparound_time:18446744073709551615 > /sys/devices/system/cpu/cpu1/acpi_cppc/feedback_ctrs:ref:30806048910 del:37298826546 > /sys/devices/system/cpu/cpu1/acpi_cppc/lowest_nonlinear_perf:36 > /sys/devices/system/cpu/cpu1/acpi_cppc/highest_perf:88 > /sys/devices/system/cpu/cpu1/acpi_cppc/nominal_freq:3900 > /sys/devices/system/cpu/cpu1/acpi_cppc/lowest_freq:0 > /sys/devices/system/cpu/cpu1/acpi_cppc/guaranteed_perf:63 > /sys/devices/system/cpu/cpu1/acpi_cppc/nominal_perf:62 > /sys/devices/system/cpu/cpu1/acpi_cppc/lowest_perf:1 > /sys/devices/system/cpu/cpu1/acpi_cppc/reference_perf:62 > /sys/devices/system/cpu/cpu1/acpi_cppc/wraparound_time:18446744073709551615 > /sys/devices/system/cpu/cpu2/acpi_cppc/feedback_ctrs:ref:30104856912 del:37149315858 > /sys/devices/system/cpu/cpu2/acpi_cppc/lowest_nonlinear_perf:36 > /sys/devices/system/cpu/cpu2/acpi_cppc/highest_perf:87 > /sys/devices/system/cpu/cpu2/acpi_cppc/nominal_freq:3900 > /sys/devices/system/cpu/cpu2/acpi_cppc/lowest_freq:0 > /sys/devices/system/cpu/cpu2/acpi_cppc/guaranteed_perf:63 > /sys/devices/system/cpu/cpu2/acpi_cppc/nominal_perf:62 > /sys/devices/system/cpu/cpu2/acpi_cppc/lowest_perf:1 > /sys/devices/system/cpu/cpu2/acpi_cppc/reference_perf:62 > /sys/devices/system/cpu/cpu2/acpi_cppc/wraparound_time:18446744073709551615 > /sys/devices/system/cpu/cpu3/acpi_cppc/feedback_ctrs:ref:28864792476 del:36395338959 > /sys/devices/system/cpu/cpu3/acpi_cppc/lowest_nonlinear_perf:36 > /sys/devices/system/cpu/cpu3/acpi_cppc/highest_perf:87 > /sys/devices/system/cpu/cpu3/acpi_cppc/nominal_freq:3900 > /sys/devices/system/cpu/cpu3/acpi_cppc/lowest_freq:0 > /sys/devices/system/cpu/cpu3/acpi_cppc/guaranteed_perf:63 > /sys/devices/system/cpu/cpu3/acpi_cppc/nominal_perf:62 > /sys/devices/system/cpu/cpu3/acpi_cppc/lowest_perf:1 > /sys/devices/system/cpu/cpu3/acpi_cppc/reference_perf:62 > /sys/devices/system/cpu/cpu3/acpi_cppc/wraparound_time:18446744073709551615 > /sys/devices/system/cpu/cpu4/acpi_cppc/feedback_ctrs:ref:29591299374 del:35708084379 > /sys/devices/system/cpu/cpu4/acpi_cppc/lowest_nonlinear_perf:36 > /sys/devices/system/cpu/cpu4/acpi_cppc/highest_perf:87 > /sys/devices/system/cpu/cpu4/acpi_cppc/nominal_freq:3900 > /sys/devices/system/cpu/cpu4/acpi_cppc/lowest_freq:0 > /sys/devices/system/cpu/cpu4/acpi_cppc/guaranteed_perf:63 > /sys/devices/system/cpu/cpu4/acpi_cppc/nominal_perf:62 > /sys/devices/system/cpu/cpu4/acpi_cppc/lowest_perf:1 > /sys/devices/system/cpu/cpu4/acpi_cppc/reference_perf:62 > /sys/devices/system/cpu/cpu4/acpi_cppc/wraparound_time:18446744073709551615 > /sys/devices/system/cpu/cpu5/acpi_cppc/feedback_ctrs:ref:27347351382 del:35000915045 > /sys/devices/system/cpu/cpu5/acpi_cppc/lowest_nonlinear_perf:36 > /sys/devices/system/cpu/cpu5/acpi_cppc/highest_perf:87 > /sys/devices/system/cpu/cpu5/acpi_cppc/nominal_freq:3900 > /sys/devices/system/cpu/cpu5/acpi_cppc/lowest_freq:0 > /sys/devices/system/cpu/cpu5/acpi_cppc/guaranteed_perf:63 > /sys/devices/system/cpu/cpu5/acpi_cppc/nominal_perf:62 > /sys/devices/system/cpu/cpu5/acpi_cppc/lowest_perf:1 > /sys/devices/system/cpu/cpu5/acpi_cppc/reference_perf:62 > /sys/devices/system/cpu/cpu5/acpi_cppc/wraparound_time:18446744073709551615 > /sys/devices/system/cpu/cpu6/acpi_cppc/feedback_ctrs:ref:28117737882 del:34854014824 > /sys/devices/system/cpu/cpu6/acpi_cppc/lowest_nonlinear_perf:36 > /sys/devices/system/cpu/cpu6/acpi_cppc/highest_perf:87 > /sys/devices/system/cpu/cpu6/acpi_cppc/nominal_freq:3900 > /sys/devices/system/cpu/cpu6/acpi_cppc/lowest_freq:0 > /sys/devices/system/cpu/cpu6/acpi_cppc/guaranteed_perf:63 > /sys/devices/system/cpu/cpu6/acpi_cppc/nominal_perf:62 > /sys/devices/system/cpu/cpu6/acpi_cppc/lowest_perf:1 > /sys/devices/system/cpu/cpu6/acpi_cppc/reference_perf:62 > /sys/devices/system/cpu/cpu6/acpi_cppc/wraparound_time:18446744073709551615 > /sys/devices/system/cpu/cpu7/acpi_cppc/feedback_ctrs:ref:29586359166 del:36871078184 > /sys/devices/system/cpu/cpu7/acpi_cppc/lowest_nonlinear_perf:36 > /sys/devices/system/cpu/cpu7/acpi_cppc/highest_perf:88 > /sys/devices/system/cpu/cpu7/acpi_cppc/nominal_freq:3900 > /sys/devices/system/cpu/cpu7/acpi_cppc/lowest_freq:0 > /sys/devices/system/cpu/cpu7/acpi_cppc/guaranteed_perf:63 > /sys/devices/system/cpu/cpu7/acpi_cppc/nominal_perf:62 > /sys/devices/system/cpu/cpu7/acpi_cppc/lowest_perf:1 > /sys/devices/system/cpu/cpu7/acpi_cppc/reference_perf:62 > /sys/devices/system/cpu/cpu7/acpi_cppc/wraparound_time:18446744073709551615 > /sys/devices/system/cpu/cpu8/acpi_cppc/feedback_ctrs:ref:28808115336 del:32798153181 > /sys/devices/system/cpu/cpu8/acpi_cppc/lowest_nonlinear_perf:21 > /sys/devices/system/cpu/cpu8/acpi_cppc/highest_perf:65 > /sys/devices/system/cpu/cpu8/acpi_cppc/nominal_freq:3300 > /sys/devices/system/cpu/cpu8/acpi_cppc/lowest_freq:0 > /sys/devices/system/cpu/cpu8/acpi_cppc/guaranteed_perf:47 > /sys/devices/system/cpu/cpu8/acpi_cppc/nominal_perf:46 > /sys/devices/system/cpu/cpu8/acpi_cppc/lowest_perf:1 > /sys/devices/system/cpu/cpu8/acpi_cppc/reference_perf:54 > /sys/devices/system/cpu/cpu8/acpi_cppc/wraparound_time:18446744073709551615 > /sys/devices/system/cpu/cpu9/acpi_cppc/feedback_ctrs:ref:28808446524 del:32557156736 > /sys/devices/system/cpu/cpu9/acpi_cppc/lowest_nonlinear_perf:21 > /sys/devices/system/cpu/cpu9/acpi_cppc/highest_perf:65 > /sys/devices/system/cpu/cpu9/acpi_cppc/nominal_freq:3300 > /sys/devices/system/cpu/cpu9/acpi_cppc/lowest_freq:0 > /sys/devices/system/cpu/cpu9/acpi_cppc/guaranteed_perf:47 > /sys/devices/system/cpu/cpu9/acpi_cppc/nominal_perf:46 > /sys/devices/system/cpu/cpu9/acpi_cppc/lowest_perf:1 > /sys/devices/system/cpu/cpu9/acpi_cppc/reference_perf:54 > /sys/devices/system/cpu/cpu9/acpi_cppc/wraparound_time:18446744073709551615 > /sys/devices/system/cpu/cpu10/acpi_cppc/feedback_ctrs:ref:28466858472 del:32126528930 > /sys/devices/system/cpu/cpu10/acpi_cppc/lowest_nonlinear_perf:21 > /sys/devices/system/cpu/cpu10/acpi_cppc/highest_perf:65 > /sys/devices/system/cpu/cpu10/acpi_cppc/nominal_freq:3300 > /sys/devices/system/cpu/cpu10/acpi_cppc/lowest_freq:0 > /sys/devices/system/cpu/cpu10/acpi_cppc/guaranteed_perf:47 > /sys/devices/system/cpu/cpu10/acpi_cppc/nominal_perf:46 > /sys/devices/system/cpu/cpu10/acpi_cppc/lowest_perf:1 > /sys/devices/system/cpu/cpu10/acpi_cppc/reference_perf:54 > /sys/devices/system/cpu/cpu10/acpi_cppc/wraparound_time:18446744073709551615 > /sys/devices/system/cpu/cpu11/acpi_cppc/feedback_ctrs:ref:30158667240 del:34095663687 > /sys/devices/system/cpu/cpu11/acpi_cppc/lowest_nonlinear_perf:21 > /sys/devices/system/cpu/cpu11/acpi_cppc/highest_perf:65 > /sys/devices/system/cpu/cpu11/acpi_cppc/nominal_freq:3300 > /sys/devices/system/cpu/cpu11/acpi_cppc/lowest_freq:0 > /sys/devices/system/cpu/cpu11/acpi_cppc/guaranteed_perf:47 > /sys/devices/system/cpu/cpu11/acpi_cppc/nominal_perf:46 > /sys/devices/system/cpu/cpu11/acpi_cppc/lowest_perf:1 > /sys/devices/system/cpu/cpu11/acpi_cppc/reference_perf:54 > /sys/devices/system/cpu/cpu11/acpi_cppc/wraparound_time:18446744073709551615 > /sys/devices/system/cpu/cpu12/acpi_cppc/feedback_ctrs:ref:29056752036 del:33047611525 > /sys/devices/system/cpu/cpu12/acpi_cppc/lowest_nonlinear_perf:21 > /sys/devices/system/cpu/cpu12/acpi_cppc/highest_perf:65 > /sys/devices/system/cpu/cpu12/acpi_cppc/nominal_freq:3300 > /sys/devices/system/cpu/cpu12/acpi_cppc/lowest_freq:0 > /sys/devices/system/cpu/cpu12/acpi_cppc/guaranteed_perf:47 > /sys/devices/system/cpu/cpu12/acpi_cppc/nominal_perf:33 > /sys/devices/system/cpu/cpu12/acpi_cppc/lowest_perf:1 > /sys/devices/system/cpu/cpu12/acpi_cppc/reference_perf:39 > /sys/devices/system/cpu/cpu12/acpi_cppc/wraparound_time:18446744073709551615 > /sys/devices/system/cpu/cpu13/acpi_cppc/feedback_ctrs:ref:28868999796 del:32974873909 > /sys/devices/system/cpu/cpu13/acpi_cppc/lowest_nonlinear_perf:21 > /sys/devices/system/cpu/cpu13/acpi_cppc/highest_perf:65 > /sys/devices/system/cpu/cpu13/acpi_cppc/nominal_freq:3300 > /sys/devices/system/cpu/cpu13/acpi_cppc/lowest_freq:0 > /sys/devices/system/cpu/cpu13/acpi_cppc/guaranteed_perf:47 > /sys/devices/system/cpu/cpu13/acpi_cppc/nominal_perf:33 > /sys/devices/system/cpu/cpu13/acpi_cppc/lowest_perf:1 > /sys/devices/system/cpu/cpu13/acpi_cppc/reference_perf:39 > /sys/devices/system/cpu/cpu13/acpi_cppc/wraparound_time:18446744073709551615 > /sys/devices/system/cpu/cpu14/acpi_cppc/feedback_ctrs:ref:32754342192 del:33580705618 > /sys/devices/system/cpu/cpu14/acpi_cppc/lowest_nonlinear_perf:21 > /sys/devices/system/cpu/cpu14/acpi_cppc/highest_perf:65 > /sys/devices/system/cpu/cpu14/acpi_cppc/nominal_freq:3300 > /sys/devices/system/cpu/cpu14/acpi_cppc/lowest_freq:0 > /sys/devices/system/cpu/cpu14/acpi_cppc/guaranteed_perf:47 > /sys/devices/system/cpu/cpu14/acpi_cppc/nominal_perf:46 > /sys/devices/system/cpu/cpu14/acpi_cppc/lowest_perf:1 > /sys/devices/system/cpu/cpu14/acpi_cppc/reference_perf:54 > /sys/devices/system/cpu/cpu14/acpi_cppc/wraparound_time:18446744073709551615 > /sys/devices/system/cpu/cpu15/acpi_cppc/feedback_ctrs:ref:30756411036 del:33232643243 > /sys/devices/system/cpu/cpu15/acpi_cppc/lowest_nonlinear_perf:21 > /sys/devices/system/cpu/cpu15/acpi_cppc/highest_perf:65 > /sys/devices/system/cpu/cpu15/acpi_cppc/nominal_freq:3300 > /sys/devices/system/cpu/cpu15/acpi_cppc/lowest_freq:0 > /sys/devices/system/cpu/cpu15/acpi_cppc/guaranteed_perf:47 > /sys/devices/system/cpu/cpu15/acpi_cppc/nominal_perf:46 > /sys/devices/system/cpu/cpu15/acpi_cppc/lowest_perf:1 > /sys/devices/system/cpu/cpu15/acpi_cppc/reference_perf:54 > /sys/devices/system/cpu/cpu15/acpi_cppc/wraparound_time:18446744073709551615 > /sys/devices/system/cpu/cpu16/acpi_cppc/feedback_ctrs:ref:29430330384 del:32848376143 > /sys/devices/system/cpu/cpu16/acpi_cppc/lowest_nonlinear_perf:21 > /sys/devices/system/cpu/cpu16/acpi_cppc/highest_perf:65 > /sys/devices/system/cpu/cpu16/acpi_cppc/nominal_freq:3300 > /sys/devices/system/cpu/cpu16/acpi_cppc/lowest_freq:0 > /sys/devices/system/cpu/cpu16/acpi_cppc/guaranteed_perf:47 > /sys/devices/system/cpu/cpu16/acpi_cppc/nominal_perf:46 > /sys/devices/system/cpu/cpu16/acpi_cppc/lowest_perf:1 > /sys/devices/system/cpu/cpu16/acpi_cppc/reference_perf:54 > /sys/devices/system/cpu/cpu16/acpi_cppc/wraparound_time:18446744073709551615 > /sys/devices/system/cpu/cpu17/acpi_cppc/feedback_ctrs:ref:29997814080 del:33374419073 > /sys/devices/system/cpu/cpu17/acpi_cppc/lowest_nonlinear_perf:21 > /sys/devices/system/cpu/cpu17/acpi_cppc/highest_perf:65 > /sys/devices/system/cpu/cpu17/acpi_cppc/nominal_freq:3300 > /sys/devices/system/cpu/cpu17/acpi_cppc/lowest_freq:0 > /sys/devices/system/cpu/cpu17/acpi_cppc/guaranteed_perf:47 > /sys/devices/system/cpu/cpu17/acpi_cppc/nominal_perf:46 > /sys/devices/system/cpu/cpu17/acpi_cppc/lowest_perf:1 > /sys/devices/system/cpu/cpu17/acpi_cppc/reference_perf:54 > /sys/devices/system/cpu/cpu17/acpi_cppc/wraparound_time:18446744073709551615 > /sys/devices/system/cpu/cpu18/acpi_cppc/feedback_ctrs:ref:28312400376 del:32285787922 > /sys/devices/system/cpu/cpu18/acpi_cppc/lowest_nonlinear_perf:21 > /sys/devices/system/cpu/cpu18/acpi_cppc/highest_perf:65 > /sys/devices/system/cpu/cpu18/acpi_cppc/nominal_freq:3300 > /sys/devices/system/cpu/cpu18/acpi_cppc/lowest_freq:0 > /sys/devices/system/cpu/cpu18/acpi_cppc/guaranteed_perf:47 > /sys/devices/system/cpu/cpu18/acpi_cppc/nominal_perf:46 > /sys/devices/system/cpu/cpu18/acpi_cppc/lowest_perf:1 > /sys/devices/system/cpu/cpu18/acpi_cppc/reference_perf:54 > /sys/devices/system/cpu/cpu18/acpi_cppc/wraparound_time:18446744073709551615 > /sys/devices/system/cpu/cpu19/acpi_cppc/feedback_ctrs:ref:28316604732 del:32229146887 > /sys/devices/system/cpu/cpu19/acpi_cppc/lowest_nonlinear_perf:21 > /sys/devices/system/cpu/cpu19/acpi_cppc/highest_perf:65 > /sys/devices/system/cpu/cpu19/acpi_cppc/nominal_freq:3300 > /sys/devices/system/cpu/cpu19/acpi_cppc/lowest_freq:0 > /sys/devices/system/cpu/cpu19/acpi_cppc/guaranteed_perf:47 > /sys/devices/system/cpu/cpu19/acpi_cppc/nominal_perf:46 > /sys/devices/system/cpu/cpu19/acpi_cppc/lowest_perf:1 > /sys/devices/system/cpu/cpu19/acpi_cppc/reference_perf:54 > /sys/devices/system/cpu/cpu19/acpi_cppc/wraparound_time:18446744073709551615 Thanks, Russell