From: Ionela Voinescu <ionela.voinescu@arm.com> To: Sudeep Holla <sudeep.holla@arm.com>, "Rafael J . Wysocki" <rjw@rjwysocki.net>, Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>, Giovanni Gherdovich <ggherdovich@suse.cz>, Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will@kernel.org>, Valentin Schneider <valentin.schneider@arm.com> Cc: linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH 0/3] arch_topology, ACPI: populate cpu capacity from CPPC Date: Fri, 14 May 2021 10:53:36 +0100 [thread overview] Message-ID: <20210514095339.12979-1-ionela.voinescu@arm.com> (raw) Hi all, These are a few trivial patches to populate cpu capacity information using performance information from ACPI's CPPC. I've tied this functionality to the existing function init_freq_invariance_cppc() called in acpi_cppc_processor_probe(). This function is renamed to a more generic arch_init_invariance_cppc(). The patches have been build tested on x86 and more thoroughly tested on Juno R2 (arm64), which uses the new functionality, with the following results: root@ubuntu:~# dmesg | grep cpu_capacity [ 2.157494] init_cpu_capacity_cppc: CPU0 cpu_capacity=38300 (raw). [ 2.163699] init_cpu_capacity_cppc: CPU1 cpu_capacity=38300 (raw). [ 2.169899] init_cpu_capacity_cppc: CPU2 cpu_capacity=38300 (raw). [ 2.176098] init_cpu_capacity_cppc: CPU3 cpu_capacity=38300 (raw). [ 2.182296] init_cpu_capacity_cppc: CPU4 cpu_capacity=102400 (raw). [ 2.188581] init_cpu_capacity_cppc: CPU5 cpu_capacity=102400 (raw). [ 2.194867] cpu_capacity: capacity_scale=102400 [ 2.199409] cpu_capacity: CPU0 cpu_capacity=383 [ 2.203952] cpu_capacity: CPU1 cpu_capacity=383 [ 2.208495] cpu_capacity: CPU2 cpu_capacity=383 [ 2.213037] cpu_capacity: CPU3 cpu_capacity=383 [ 2.217580] cpu_capacity: CPU4 cpu_capacity=1024 [ 2.222209] cpu_capacity: CPU5 cpu_capacity=1024 [ 2.226886] init_cpu_capacity_cppc: cpu_capacity initialization done root@ubuntu:~# tail -n +1 /sys/devices/system/cpu/cpu*/cpu_capacity ==> /sys/devices/system/cpu/cpu0/cpu_capacity <== 383 ==> /sys/devices/system/cpu/cpu1/cpu_capacity <== 383 ==> /sys/devices/system/cpu/cpu2/cpu_capacity <== 383 ==> /sys/devices/system/cpu/cpu3/cpu_capacity <== 383 ==> /sys/devices/system/cpu/cpu4/cpu_capacity <== 1024 ==> /sys/devices/system/cpu/cpu5/cpu_capacity <== 1024 All works as expected even if ACPI processor support is built as a module. Patches are based on v5.13-rc1. Let me know what you think! Thanks, Ionela. Ionela Voinescu (3): x86, ACPI: rename init_freq_invariance_cppc to arch_init_invariance_cppc arch_topology: obtain cpu capacity using information from CPPC arm64, topology: enable use of init_cpu_capacity_cppc() arch/arm64/include/asm/topology.h | 4 ++++ arch/x86/include/asm/topology.h | 2 +- drivers/acpi/cppc_acpi.c | 6 ++--- drivers/base/arch_topology.c | 39 +++++++++++++++++++++++++++++++ include/linux/arch_topology.h | 4 ++++ 5 files changed, 51 insertions(+), 4 deletions(-) -- 2.29.2.dirty
WARNING: multiple messages have this Message-ID (diff)
From: Ionela Voinescu <ionela.voinescu@arm.com> To: Sudeep Holla <sudeep.holla@arm.com>, "Rafael J . Wysocki" <rjw@rjwysocki.net>, Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>, Giovanni Gherdovich <ggherdovich@suse.cz>, Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will@kernel.org>, Valentin Schneider <valentin.schneider@arm.com> Cc: linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH 0/3] arch_topology, ACPI: populate cpu capacity from CPPC Date: Fri, 14 May 2021 10:53:36 +0100 [thread overview] Message-ID: <20210514095339.12979-1-ionela.voinescu@arm.com> (raw) Hi all, These are a few trivial patches to populate cpu capacity information using performance information from ACPI's CPPC. I've tied this functionality to the existing function init_freq_invariance_cppc() called in acpi_cppc_processor_probe(). This function is renamed to a more generic arch_init_invariance_cppc(). The patches have been build tested on x86 and more thoroughly tested on Juno R2 (arm64), which uses the new functionality, with the following results: root@ubuntu:~# dmesg | grep cpu_capacity [ 2.157494] init_cpu_capacity_cppc: CPU0 cpu_capacity=38300 (raw). [ 2.163699] init_cpu_capacity_cppc: CPU1 cpu_capacity=38300 (raw). [ 2.169899] init_cpu_capacity_cppc: CPU2 cpu_capacity=38300 (raw). [ 2.176098] init_cpu_capacity_cppc: CPU3 cpu_capacity=38300 (raw). [ 2.182296] init_cpu_capacity_cppc: CPU4 cpu_capacity=102400 (raw). [ 2.188581] init_cpu_capacity_cppc: CPU5 cpu_capacity=102400 (raw). [ 2.194867] cpu_capacity: capacity_scale=102400 [ 2.199409] cpu_capacity: CPU0 cpu_capacity=383 [ 2.203952] cpu_capacity: CPU1 cpu_capacity=383 [ 2.208495] cpu_capacity: CPU2 cpu_capacity=383 [ 2.213037] cpu_capacity: CPU3 cpu_capacity=383 [ 2.217580] cpu_capacity: CPU4 cpu_capacity=1024 [ 2.222209] cpu_capacity: CPU5 cpu_capacity=1024 [ 2.226886] init_cpu_capacity_cppc: cpu_capacity initialization done root@ubuntu:~# tail -n +1 /sys/devices/system/cpu/cpu*/cpu_capacity ==> /sys/devices/system/cpu/cpu0/cpu_capacity <== 383 ==> /sys/devices/system/cpu/cpu1/cpu_capacity <== 383 ==> /sys/devices/system/cpu/cpu2/cpu_capacity <== 383 ==> /sys/devices/system/cpu/cpu3/cpu_capacity <== 383 ==> /sys/devices/system/cpu/cpu4/cpu_capacity <== 1024 ==> /sys/devices/system/cpu/cpu5/cpu_capacity <== 1024 All works as expected even if ACPI processor support is built as a module. Patches are based on v5.13-rc1. Let me know what you think! Thanks, Ionela. Ionela Voinescu (3): x86, ACPI: rename init_freq_invariance_cppc to arch_init_invariance_cppc arch_topology: obtain cpu capacity using information from CPPC arm64, topology: enable use of init_cpu_capacity_cppc() arch/arm64/include/asm/topology.h | 4 ++++ arch/x86/include/asm/topology.h | 2 +- drivers/acpi/cppc_acpi.c | 6 ++--- drivers/base/arch_topology.c | 39 +++++++++++++++++++++++++++++++ include/linux/arch_topology.h | 4 ++++ 5 files changed, 51 insertions(+), 4 deletions(-) -- 2.29.2.dirty _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next reply other threads:[~2021-05-14 9:54 UTC|newest] Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-05-14 9:53 Ionela Voinescu [this message] 2021-05-14 9:53 ` [PATCH 0/3] arch_topology, ACPI: populate cpu capacity from CPPC Ionela Voinescu 2021-05-14 9:53 ` [PATCH 1/3] x86, ACPI: rename init_freq_invariance_cppc to arch_init_invariance_cppc Ionela Voinescu 2021-05-14 9:53 ` Ionela Voinescu 2021-05-14 9:53 ` [PATCH 2/3] arch_topology: obtain cpu capacity using information from CPPC Ionela Voinescu 2021-05-14 9:53 ` Ionela Voinescu 2021-05-14 16:16 ` Dietmar Eggemann 2021-05-14 16:16 ` Dietmar Eggemann 2021-05-19 9:46 ` Ionela Voinescu 2021-05-19 9:46 ` Ionela Voinescu 2021-05-18 13:12 ` Valentin Schneider 2021-05-18 13:12 ` Valentin Schneider 2021-05-14 9:53 ` [PATCH 3/3] arm64, topology: enable use of init_cpu_capacity_cppc() Ionela Voinescu 2021-05-14 9:53 ` Ionela Voinescu 2021-05-14 10:35 ` Catalin Marinas 2021-05-14 10:35 ` Catalin Marinas 2021-05-14 16:17 ` Dietmar Eggemann 2021-05-14 16:17 ` Dietmar Eggemann 2021-05-19 9:48 ` Ionela Voinescu 2021-05-19 9:48 ` Ionela Voinescu 2021-05-18 13:12 ` [PATCH 0/3] arch_topology, ACPI: populate cpu capacity from CPPC Valentin Schneider 2021-05-18 13:12 ` Valentin Schneider 2021-05-19 9:51 ` Ionela Voinescu 2021-05-19 9:51 ` Ionela Voinescu 2021-06-28 13:58 ` [tip: sched/core] sched/debug: Don't update sched_domain debug directories before sched_debug_init() tip-bot2 for Valentin Schneider
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