From: Viresh Kumar <viresh.kumar@linaro.org>
To: Ionela Voinescu <ionela.voinescu@arm.com>,
Rafael Wysocki <rjw@rjwysocki.net>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>
Cc: Vincent Guittot <vincent.guittot@linaro.org>,
linux-pm@vger.kernel.org, Viresh Kumar <viresh.kumar@linaro.org>,
linux-kernel@vger.kernel.org,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Sudeep Holla <sudeep.holla@arm.com>,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH V3 0/2] cpufreq: cppc: Add support for frequency invariance
Date: Thu, 28 Jan 2021 16:18:54 +0530 [thread overview]
Message-ID: <cover.1611829953.git.viresh.kumar@linaro.org> (raw)
Hello,
CPPC cpufreq driver is used for ARM servers and this patch series tries
to provide counter-based frequency invariance support for them in the
absence for architecture specific counters (like AMUs).
This is tested with some hacks, as I didn't have access to the right
hardware, on the ARM64 hikey board to check the overall functionality
and that works fine.
Vincent/Ionela, it would be nice if you guys can give this a shot on
some real hardware where counters work.
This is based of pm/linux-next (need some stuff from the arm64 tree).
These patches should get merged via the arm64 tree only for the same
reason.
Changes since V2:
- Not sending as an RFC anymore.
- Several renames, reordering of code in 1/2 based on Ionela's comments.
- Several rebase changes for 2/2.
- The freq_scale calculations are optimized a bit.
- Better overall commenting and commit logs.
Changes since V1:
- The interface for setting the callbacks is improved, so different
parts looking to provide their callbacks don't need to think about
each other.
- Moved to per-cpu storage for storing the callback related data, AMU
counters have higher priority with this.
--
viresh
Viresh Kumar (2):
topology: Allow multiple entities to provide sched_freq_tick()
callback
cpufreq: cppc: Add support for frequency invariance
arch/arm64/include/asm/topology.h | 10 +-
arch/arm64/kernel/topology.c | 89 +++++++--------
drivers/base/arch_topology.c | 56 +++++++++-
drivers/cpufreq/cppc_cpufreq.c | 179 ++++++++++++++++++++++++++++--
include/linux/arch_topology.h | 15 ++-
kernel/sched/core.c | 1 +
6 files changed, 274 insertions(+), 76 deletions(-)
--
2.25.0.rc1.19.g042ed3e048af
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next reply other threads:[~2021-01-28 10:50 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-28 10:48 Viresh Kumar [this message]
2021-01-28 10:48 ` [PATCH V3 1/2] topology: Allow multiple entities to provide sched_freq_tick() callback Viresh Kumar
2021-02-03 11:45 ` Ionela Voinescu
2021-02-05 9:14 ` Viresh Kumar
2021-02-17 0:24 ` Ionela Voinescu
2021-02-17 4:25 ` Viresh Kumar
2021-02-17 11:30 ` Ionela Voinescu
2021-02-17 11:40 ` Viresh Kumar
2021-02-17 11:57 ` Ionela Voinescu
2021-02-18 7:23 ` Viresh Kumar
2021-02-18 9:33 ` Viresh Kumar
2021-02-18 16:36 ` Ionela Voinescu
2021-02-19 4:58 ` Viresh Kumar
2021-02-19 9:44 ` Ionela Voinescu
2021-02-19 9:48 ` Viresh Kumar
2021-01-28 10:48 ` [PATCH V3 2/2] cpufreq: cppc: Add support for frequency invariance Viresh Kumar
2021-02-18 16:35 ` Ionela Voinescu
2021-02-22 11:00 ` Ionela Voinescu
2021-02-22 11:04 ` Viresh Kumar
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