From: Juri Lelli <juri.lelli@arm.com>
To: peterz@infradead.org, mingo@redhat.com, rjw@rjwysocki.net,
viresh.kumar@linaro.org
Cc: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org,
tglx@linutronix.de, vincent.guittot@linaro.org,
rostedt@goodmis.org, luca.abeni@santannapisa.it,
claudio@evidence.eu.com, tommaso.cucinotta@santannapisa.it,
bristot@redhat.com, mathieu.poirier@linaro.org,
tkjos@android.com, joelaf@google.com, andresoportus@google.com,
morten.rasmussen@arm.com, dietmar.eggemann@arm.com,
patrick.bellasi@arm.com, juri.lelli@arm.com
Subject: [RFC PATCH v1 0/8] SCHED_DEADLINE freq/cpu invariance and OPP selection
Date: Wed, 5 Jul 2017 09:58:57 +0100 [thread overview]
Message-ID: <20170705085905.6558-1-juri.lelli@arm.com> (raw)
Hi,
v1 of the RFC set implementing frequency/cpu invariance and OPP selection for
SCHED_DEADLINE [1]. The set is based on tip/sched/core as of today
(72298e5c92c5), which now already includes Luca's "CPU reclaiming for
SCHED_DEADLINE".
Thanks a lot for reviewing RFCv0!
Patches high level description:
o [01-02]/08 add the necessary links to start accounting DEADLINE contribution
to OPP selection
o 03/08 it's a temporary solution to make possible (on ARM) to change
frequency for DEADLINE tasks (that would possibly delay the SCHED_FIFO
worker kthread); proper solution would be to be able to issue frequency
transition from an atomic ctx
o [04-05]/08 it's a schedutil change that copes with the fact that DEADLINE
doesn't require periodic OPP selection triggering point
o [06-07]/08 make arch_scale_{freq,cpu}_capacity() function available on !CONFIG_SMP
configurations too
o 08/08 implements frequency/cpu invariance for tasks' reservation
parameters; which basically means that we implement GRUB-PA [2]
Changes w.r.t. RFCv0:
- rebase on tip/sched/core
- make use of BW_SHIFT for calculations (Peter)
- added a comment about guaranteed/requested frequency (Peter)
- use a high bit for sched_flags SCHED_FLAG_SPECIAL hack; don't expose it to
userspace and add comments (Peter)
- refactor aggregation of utilization from scheduling classes
Please have a look. Feedback and comments are, as usual, more than welcome.
In case you would like to test this out:
git://linux-arm.org/linux-jl.git upstream/deadline/freq-rfc-v1
Best,
- Juri
Juri Lelli (8):
sched/cpufreq_schedutil: make use of DEADLINE utilization signal
sched/deadline: move cpu frequency selection triggering points
sched/cpufreq_schedutil: make worker kthread be SCHED_DEADLINE
sched/cpufreq_schedutil: split utilization signals
sched/cpufreq_schedutil: always consider all CPUs when deciding next
freq
sched/sched.h: remove sd arch_scale_freq_capacity parameter
sched/sched.h: move arch_scale_{freq,cpu}_capacity outside CONFIG_SMP
sched/deadline: make bandwidth enforcement scale-invariant
include/linux/sched.h | 1 +
include/linux/sched/cpufreq.h | 2 --
include/linux/sched/topology.h | 12 +++----
kernel/sched/core.c | 15 ++++++--
kernel/sched/cpufreq_schedutil.c | 77 ++++++++++++++++++++++++++--------------
kernel/sched/deadline.c | 46 ++++++++++++++++++++----
kernel/sched/fair.c | 4 +--
kernel/sched/sched.h | 51 +++++++++++++++++++-------
8 files changed, 149 insertions(+), 59 deletions(-)
--
2.11.0
next reply other threads:[~2017-07-05 9:00 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-05 8:58 Juri Lelli [this message]
2017-07-05 8:58 ` [RFC PATCH v1 1/8] sched/cpufreq_schedutil: make use of DEADLINE utilization signal Juri Lelli
2017-07-07 7:20 ` Viresh Kumar
2017-07-05 8:58 ` [RFC PATCH v1 2/8] sched/deadline: move cpu frequency selection triggering points Juri Lelli
2017-07-07 7:21 ` Viresh Kumar
2017-07-05 8:59 ` [RFC PATCH v1 3/8] sched/cpufreq_schedutil: make worker kthread be SCHED_DEADLINE Juri Lelli
2017-07-07 3:56 ` Joel Fernandes
2017-07-07 10:43 ` Juri Lelli
2017-07-07 10:46 ` Thomas Gleixner
2017-07-07 10:53 ` Juri Lelli
2017-07-07 13:11 ` Rafael J. Wysocki
2017-07-07 21:58 ` Steven Rostedt
2017-07-07 22:07 ` Joel Fernandes
2017-07-07 22:15 ` Steven Rostedt
2017-07-07 22:57 ` Joel Fernandes
2017-07-11 12:37 ` Peter Zijlstra
2017-07-07 7:21 ` Viresh Kumar
2017-07-11 16:18 ` Peter Zijlstra
2017-07-11 17:02 ` Juri Lelli
2017-07-05 8:59 ` [RFC PATCH v1 4/8] sched/cpufreq_schedutil: split utilization signals Juri Lelli
2017-07-07 3:26 ` Joel Fernandes
2017-07-07 8:58 ` Viresh Kumar
2017-07-07 10:59 ` Juri Lelli
2017-07-10 7:46 ` Joel Fernandes
2017-07-10 7:05 ` Viresh Kumar
2017-07-05 8:59 ` [RFC PATCH v1 5/8] sched/cpufreq_schedutil: always consider all CPUs when deciding next freq Juri Lelli
2017-07-07 8:59 ` Viresh Kumar
2017-07-11 16:17 ` Peter Zijlstra
2017-07-11 17:18 ` Juri Lelli
2017-07-05 8:59 ` [RFC PATCH v1 6/8] sched/sched.h: remove sd arch_scale_freq_capacity parameter Juri Lelli
2017-07-05 8:59 ` [RFC PATCH v1 7/8] sched/sched.h: move arch_scale_{freq,cpu}_capacity outside CONFIG_SMP Juri Lelli
2017-07-07 22:04 ` Steven Rostedt
2017-07-05 8:59 ` [RFC PATCH v1 8/8] sched/deadline: make bandwidth enforcement scale-invariant Juri Lelli
2017-07-19 7:21 ` Peter Zijlstra
2017-07-19 9:20 ` Juri Lelli
2017-07-19 11:00 ` Peter Zijlstra
2017-07-19 11:16 ` Juri Lelli
2017-07-24 16:43 ` Peter Zijlstra
2017-07-25 7:03 ` Luca Abeni
2017-07-25 13:51 ` Peter Zijlstra
2017-07-26 13:50 ` luca abeni
2017-07-06 15:57 ` [RFC PATCH v1 0/8] SCHED_DEADLINE freq/cpu invariance and OPP selection Steven Rostedt
2017-07-06 16:08 ` Juri Lelli
2017-07-06 16:15 ` Peter Zijlstra
2017-07-06 21:08 ` Rafael J. Wysocki
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