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([2a01:e0a:f:6020:3172:eb13:5bac:126a]) by smtp.gmail.com with ESMTPSA id p6-20020a05600c358600b004053a6b8c41sm5315809wmq.12.2023.11.04.03.59.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 04 Nov 2023 03:59:11 -0700 (PDT) From: Vincent Guittot To: linux@armlinux.org.uk, catalin.marinas@arm.com, will@kernel.org, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, sudeep.holla@arm.com, gregkh@linuxfoundation.org, rafael@kernel.org, mingo@redhat.com, peterz@infradead.org, juri.lelli@redhat.com, dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, viresh.kumar@linaro.org, lenb@kernel.org, robert.moore@intel.com, lukasz.luba@arm.com, ionela.voinescu@arm.com, pierre.gondois@arm.com, beata.michalska@arm.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, linux-pm@vger.kernel.org, linux-acpi@vger.kernel.org Cc: conor.dooley@microchip.com, suagrfillet@gmail.com, ajones@ventanamicro.com, lftan@kernel.org, Vincent Guittot Subject: [PATCH v5 0/7] consolidate and cleanup CPU capacity Date: Sat, 4 Nov 2023 11:59:00 +0100 Message-Id: <20231104105907.1365392-1-vincent.guittot@linaro.org> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 This is the 1st part of consolidating how the max compute capacity is used in the scheduler and how we calculate the frequency for a level of utilization. Fix some unconsistancy when computing frequency for an utilization. There can be a mismatch between energy model and schedutil. Next step will be to make a difference between the original max compute capacity of a CPU and what is currently available when there is a capping applying forever (i.e. seconds or more). Changes since v4: - Capitalize the verb in subject - Remove usless parentheses in cppc_get_dmi_max_khz() - Use freq_ref pattern everywhere - Fix MHz / kHz units conversion for cppc_cpufreq - Move default definition of arch_scale_freq_ref() in include/linux/sched/topology.h beside arch_scale_cpu_capacity which faces similar default declaration behavior. This location covers all cases with arch and CONFIG_* which was not the case with previous attempts. Changes since v3: - Split patch 5 cpufreq/cppc - Fix topology_init_cpu_capacity_cppc() - Fix init if AMU ratio - Added some tags Changes since v2: - Remove the 1st patch which has been queued in tip - Rework how to initialize the reference frequency for cppc_cpufreq and change topology_init_cpu_capacity_cppc() to also set capacity_ref_freq - Add a RFC to convert AMU to use arch_scale_freq_ref and move the config of the AMU ratio to be done when intializing cpu capacity and capacity_ref_freq - Added some tags Changes since v1: - Fix typos - Added changes in cpufreq to use arch_scale_freq_ref() when calling arch_set_freq_scale (patch 3). - arch_scale_freq_ref() is always defined and returns 0 (as proposed by Ionela) when not defined by the arch. This simplifies the code with the addition of patch 3. - Simplify Energy Model which always uses arch_scale_freq_ref(). The latter returns 0 when not defined by arch instead of last item of the perf domain. This is not a problem because the function is only defined for compilation purpose in this case and we don't care about the returned value. (patch 5) - Added changes in cppc cpufreq to set capacity_ref_freq (patch 6) - Added reviewed tag for patch 1 which got a minor change but not for others as I did some changes which could make previous reviewed tag no more relevant. Vincent Guittot (7): topology: Add a new arch_scale_freq_reference cpufreq: Use the fixed and coherent frequency for scaling capacity cpufreq/schedutil: Use a fixed reference frequency energy_model: Use a fixed reference frequency cpufreq/cppc: Move and rename cppc_cpufreq_{perf_to_khz|khz_to_perf} cpufreq/cppc: Set the frequency used for computing the capacity arm64/amu: Use capacity_ref_freq to set AMU ratio arch/arm/include/asm/topology.h | 1 + arch/arm64/include/asm/topology.h | 1 + arch/arm64/kernel/topology.c | 26 +++--- arch/riscv/include/asm/topology.h | 1 + drivers/acpi/cppc_acpi.c | 104 ++++++++++++++++++++++ drivers/base/arch_topology.c | 56 ++++++++---- drivers/cpufreq/cppc_cpufreq.c | 139 ++++-------------------------- drivers/cpufreq/cpufreq.c | 4 +- include/acpi/cppc_acpi.h | 2 + include/linux/arch_topology.h | 8 ++ include/linux/cpufreq.h | 1 + include/linux/energy_model.h | 6 +- include/linux/sched/topology.h | 8 ++ kernel/sched/cpufreq_schedutil.c | 26 +++++- 14 files changed, 225 insertions(+), 158 deletions(-)