From: Vincent Guittot <vincent.guittot@linaro.org>
To: linux@armlinux.org.uk, catalin.marinas@arm.com, will@kernel.org,
sudeep.holla@arm.com, rafael@kernel.org, viresh.kumar@linaro.org,
agross@kernel.org, andersson@kernel.org,
konrad.dybcio@linaro.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, lukasz.luba@arm.com,
rui.zhang@intel.com, mhiramat@kernel.org,
daniel.lezcano@linaro.org, amit.kachhap@gmail.com,
corbet@lwn.net, gregkh@linuxfoundation.org,
linux-arm-kernel@lists.infradead.org,
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linux-arm-msm@vger.kernel.org,
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Cc: Vincent Guittot <vincent.guittot@linaro.org>
Subject: [PATCH v6 0/5] Rework system pressure interface to the scheduler
Date: Tue, 26 Mar 2024 10:16:11 +0100 [thread overview]
Message-ID: <20240326091616.3696851-1-vincent.guittot@linaro.org> (raw)
Following the consolidation and cleanup of CPU capacity in [1], this serie
reworks how the scheduler gets the pressures on CPUs. We need to take into
account all pressures applied by cpufreq on the compute capacity of a CPU
for dozens of ms or more and not only cpufreq cooling device or HW
mitigiations. We split the pressure applied on CPU's capacity in 2 parts:
- one from cpufreq and freq_qos
- one from HW high freq mitigiation.
The next step will be to add a dedicated interface for long standing
capping of the CPU capacity (i.e. for seconds or more) like the
scaling_max_freq of cpufreq sysfs. The latter is already taken into
account by this serie but as a temporary pressure which is not always the
best choice when we know that it will happen for seconds or more.
[1] https://lore.kernel.org/lkml/20231211104855.558096-1-vincent.guittot@linaro.org/
Change since v5:
- Rebase to fix a conflict in include/linux/cpufreq.h
- Add few more tested and reviewed tags
Change since v4:
- Add READ_ONCE() in cpufreq_get_pressure()
- Add ack and reviewed tags
Change since v3:
- Fix uninitialized variables in cpufreq_update_pressure()
Change since v2:
- Rework cpufreq_update_pressure()
Change since v1:
- Use struct cpufreq_policy as parameter of cpufreq_update_pressure()
- Fix typos and comments
- Make sched_thermal_decay_shift boot param as deprecated
Vincent Guittot (5):
cpufreq: Add a cpufreq pressure feedback for the scheduler
sched: Take cpufreq feedback into account
thermal/cpufreq: Remove arch_update_thermal_pressure()
sched: Rename arch_update_thermal_pressure into
arch_update_hw_pressure
sched/pelt: Remove shift of thermal clock
.../admin-guide/kernel-parameters.txt | 1 +
arch/arm/include/asm/topology.h | 6 +-
arch/arm64/include/asm/topology.h | 6 +-
drivers/base/arch_topology.c | 26 ++++----
drivers/cpufreq/cpufreq.c | 36 +++++++++++
drivers/cpufreq/qcom-cpufreq-hw.c | 4 +-
drivers/thermal/cpufreq_cooling.c | 3 -
include/linux/arch_topology.h | 8 +--
include/linux/cpufreq.h | 10 +++
include/linux/sched/topology.h | 8 +--
.../{thermal_pressure.h => hw_pressure.h} | 14 ++---
include/trace/events/sched.h | 2 +-
init/Kconfig | 12 ++--
kernel/sched/core.c | 8 +--
kernel/sched/fair.c | 63 +++++++++----------
kernel/sched/pelt.c | 18 +++---
kernel/sched/pelt.h | 16 ++---
kernel/sched/sched.h | 22 +------
18 files changed, 144 insertions(+), 119 deletions(-)
rename include/trace/events/{thermal_pressure.h => hw_pressure.h} (55%)
--
2.34.1
next reply other threads:[~2024-03-26 9:16 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-26 9:16 Vincent Guittot [this message]
2024-03-26 9:16 ` [PATCH v6 1/5] cpufreq: Add a cpufreq pressure feedback for the scheduler Vincent Guittot
2024-03-26 11:44 ` Dhruva Gole
2024-03-26 9:16 ` [PATCH v6 2/5] sched: Take cpufreq feedback into account Vincent Guittot
2024-03-26 9:16 ` [PATCH v6 3/5] thermal/cpufreq: Remove arch_update_thermal_pressure() Vincent Guittot
2024-03-26 11:46 ` Dhruva Gole
2024-03-26 9:16 ` [PATCH v6 4/5] sched: Rename arch_update_thermal_pressure into arch_update_hw_pressure Vincent Guittot
2024-04-30 11:23 ` Konrad Dybcio
2024-04-30 12:00 ` Vincent Guittot
2024-04-30 12:15 ` Konrad Dybcio
2024-03-26 9:16 ` [PATCH v6 5/5] sched/pelt: Remove shift of thermal clock Vincent Guittot
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