From: Ricardo Neri <ricardo.neri-calderon@linux.intel.com>
To: "Peter Zijlstra (Intel)" <peterz@infradead.org>,
Juri Lelli <juri.lelli@redhat.com>,
Vincent Guittot <vincent.guittot@linaro.org>
Cc: Ricardo Neri <ricardo.neri@intel.com>,
"Ravi V. Shankar" <ravi.v.shankar@intel.com>,
Ben Segall <bsegall@google.com>,
Daniel Bristot de Oliveira <bristot@redhat.com>,
Dietmar Eggemann <dietmar.eggemann@arm.com>,
Len Brown <len.brown@intel.com>, Mel Gorman <mgorman@suse.de>,
"Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>,
Steven Rostedt <rostedt@goodmis.org>,
Tim Chen <tim.c.chen@linux.intel.com>,
Valentin Schneider <vschneid@redhat.com>,
Lukasz Luba <lukasz.luba@arm.com>,
Ionela Voinescu <ionela.voinescu@arm.com>,
x86@kernel.org,
"Joel Fernandes (Google)" <joel@joelfernandes.org>,
linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org,
Ricardo Neri <ricardo.neri-calderon@linux.intel.com>
Subject: [PATCH v3 00/24] sched: Introduce classes of tasks for load balance
Date: Mon, 6 Feb 2023 21:10:41 -0800 [thread overview]
Message-ID: <20230207051105.11575-1-ricardo.neri-calderon@linux.intel.com> (raw)
Hi,
This is third version of this patchset. Previous versions can be found
here [1] and here [2]. For brevity, I did not include the cover letter
from the original posting. You can read it here [1].
This patchset depends on a separate series to handle better asym_packing
between SMT cores [3].
For convenience, this patchset and [3] can be retrieved from [4] and are
based on the tip tree as on Feb 6th, 2023.
Changes since v2:
Ionela pointed out that the IPCC performance score was vague. I provided
a clearer definition and guidance on how architectures should implement
support for it.
Ionela mentioned that other architectures or scheduling schemes may want
to use IPC classes differently. I restricted its current use to
asym_packing.
Lukasz raised the issue that hardware may not be ready to support IPC
classes early after boot. I added a new interface that drivers or
enablement code can call to enable the use of IPC classes when ready.
Vincent provided multiple suggestions on how to balance non-SMT and SMT
sched groups. His feedback was incorporated in [3]. As a result, now
IPCC statistics are also used to break ties between fully_busy groups.
Dietmar indicated that real-time nor deadline tasks should influence the
CFS load balancing. I implemented such change. Also, as per his suggestion,
I folded the IPCC statistics into the existing struct sg_lb_stats.
Updated patches: 2, 6, 7, 10, 13, 14, 17
New patches: 9, 20
Unchanged patches: 1, 3, 4, 5, 8, 11, 12, 15, 16, 18, 19, 21, 22, 23, 24
Hopefully, this series is one step closer to be merged.
Thanks in advance for your kind feedback!
BR,
Ricardo
[1]. https://lore.kernel.org/lkml/20220909231205.14009-1-ricardo.neri-calderon@linux.intel.com/
[2]. https://lore.kernel.org/lkml/20221128132100.30253-1-ricardo.neri-calderon@linux.intel.com/
[3]. https://lore.kernel.org/lkml/20230207045838.11243-1-ricardo.neri-calderon@linux.intel.com/
[4]. https://github.com/ricardon/tip/tree/rneri/ipc_classes_v3
Ricardo Neri (24):
sched/task_struct: Introduce IPC classes of tasks
sched: Add interfaces for IPC classes
sched/core: Initialize the IPC class of a new task
sched/core: Add user_tick as argument to scheduler_tick()
sched/core: Update the IPC class of the current task
sched/fair: Collect load-balancing stats for IPC classes
sched/fair: Compute IPC class scores for load balancing
sched/fair: Use IPCC stats to break ties between asym_packing sched
groups
sched/fair: Use IPCC stats to break ties between fully_busy SMT groups
sched/fair: Use IPCC scores to select a busiest runqueue
thermal: intel: hfi: Introduce Intel Thread Director classes
x86/cpufeatures: Add the Intel Thread Director feature definitions
thermal: intel: hfi: Store per-CPU IPCC scores
thermal: intel: hfi: Update the IPC class of the current task
thermal: intel: hfi: Report the IPC class score of a CPU
thermal: intel: hfi: Define a default class for unclassified tasks
thermal: intel: hfi: Enable the Intel Thread Director
sched/task_struct: Add helpers for IPC classification
sched/core: Initialize helpers of task classification
sched/fair: Introduce sched_smt_siblings_idle()
thermal: intel: hfi: Implement model-specific checks for task
classification
x86/cpufeatures: Add feature bit for HRESET
x86/hreset: Configure history reset
x86/process: Reset hardware history in context switch
arch/x86/include/asm/cpufeatures.h | 2 +
arch/x86/include/asm/disabled-features.h | 8 +-
arch/x86/include/asm/hreset.h | 30 +++
arch/x86/include/asm/msr-index.h | 6 +-
arch/x86/include/asm/topology.h | 8 +
arch/x86/kernel/cpu/common.c | 30 ++-
arch/x86/kernel/cpu/cpuid-deps.c | 1 +
arch/x86/kernel/cpu/scattered.c | 1 +
arch/x86/kernel/process_32.c | 3 +
arch/x86/kernel/process_64.c | 3 +
drivers/thermal/intel/intel_hfi.c | 242 +++++++++++++++++-
include/linux/sched.h | 24 +-
include/linux/sched/topology.h | 6 +
init/Kconfig | 12 +
kernel/sched/core.c | 10 +-
kernel/sched/fair.c | 309 ++++++++++++++++++++++-
kernel/sched/sched.h | 66 +++++
kernel/sched/topology.c | 9 +
kernel/time/timer.c | 2 +-
19 files changed, 751 insertions(+), 21 deletions(-)
create mode 100644 arch/x86/include/asm/hreset.h
--
2.25.1
next reply other threads:[~2023-02-07 5:02 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-07 5:10 Ricardo Neri [this message]
2023-02-07 5:10 ` [PATCH v3 01/24] sched/task_struct: Introduce IPC classes of tasks Ricardo Neri
2023-02-07 5:10 ` [PATCH v3 02/24] sched: Add interfaces for IPC classes Ricardo Neri
2023-02-07 5:10 ` [PATCH v3 03/24] sched/core: Initialize the IPC class of a new task Ricardo Neri
2023-02-07 5:10 ` [PATCH v3 04/24] sched/core: Add user_tick as argument to scheduler_tick() Ricardo Neri
2023-02-07 5:10 ` [PATCH v3 05/24] sched/core: Update the IPC class of the current task Ricardo Neri
2023-02-07 5:10 ` [PATCH v3 06/24] sched/fair: Collect load-balancing stats for IPC classes Ricardo Neri
2023-02-07 5:10 ` [PATCH v3 07/24] sched/fair: Compute IPC class scores for load balancing Ricardo Neri
2023-03-28 10:00 ` Vincent Guittot
2023-03-30 2:07 ` Ricardo Neri
2023-03-31 12:20 ` Vincent Guittot
2023-04-17 22:52 ` Ricardo Neri
2023-02-07 5:10 ` [PATCH v3 08/24] sched/fair: Use IPCC stats to break ties between asym_packing sched groups Ricardo Neri
2023-02-07 5:10 ` [PATCH v3 09/24] sched/fair: Use IPCC stats to break ties between fully_busy SMT groups Ricardo Neri
2023-02-07 5:10 ` [PATCH v3 10/24] sched/fair: Use IPCC scores to select a busiest runqueue Ricardo Neri
2023-03-28 10:03 ` Vincent Guittot
2023-03-30 2:14 ` Ricardo Neri
2023-03-31 12:23 ` Vincent Guittot
2023-04-17 23:01 ` Ricardo Neri
2023-02-07 5:10 ` [PATCH v3 11/24] thermal: intel: hfi: Introduce Intel Thread Director classes Ricardo Neri
2023-03-27 16:31 ` Rafael J. Wysocki
2023-03-28 23:42 ` Ricardo Neri
2023-02-07 5:10 ` [PATCH v3 12/24] x86/cpufeatures: Add the Intel Thread Director feature definitions Ricardo Neri
2023-02-07 5:10 ` [PATCH v3 13/24] thermal: intel: hfi: Store per-CPU IPCC scores Ricardo Neri
2023-03-27 16:37 ` Rafael J. Wysocki
2023-03-28 23:43 ` Ricardo Neri
2023-03-29 12:08 ` Rafael J. Wysocki
2023-03-30 2:15 ` Ricardo Neri
2023-02-07 5:10 ` [PATCH v3 14/24] thermal: intel: hfi: Update the IPC class of the current task Ricardo Neri
2023-03-27 16:42 ` Rafael J. Wysocki
2023-03-28 23:41 ` Ricardo Neri
2023-03-29 12:13 ` Rafael J. Wysocki
2023-03-30 3:06 ` Ricardo Neri
2023-02-07 5:10 ` [PATCH v3 15/24] thermal: intel: hfi: Report the IPC class score of a CPU Ricardo Neri
2023-03-27 16:50 ` Rafael J. Wysocki
2023-03-28 23:41 ` Ricardo Neri
2023-03-29 12:17 ` Rafael J. Wysocki
2023-03-31 2:07 ` Ricardo Neri
2023-02-07 5:10 ` [PATCH v3 16/24] thermal: intel: hfi: Define a default class for unclassified tasks Ricardo Neri
2023-03-27 16:51 ` Rafael J. Wysocki
2023-03-28 23:49 ` Ricardo Neri
2023-02-07 5:10 ` [PATCH v3 17/24] thermal: intel: hfi: Enable the Intel Thread Director Ricardo Neri
2023-03-27 16:53 ` Rafael J. Wysocki
2023-03-28 23:50 ` Ricardo Neri
2023-02-07 5:10 ` [PATCH v3 18/24] sched/task_struct: Add helpers for IPC classification Ricardo Neri
2023-02-07 5:11 ` [PATCH v3 19/24] sched/core: Initialize helpers of task classification Ricardo Neri
2023-02-07 5:11 ` [PATCH v3 20/24] sched/fair: Introduce sched_smt_siblings_idle() Ricardo Neri
2023-02-07 5:11 ` [PATCH v3 21/24] thermal: intel: hfi: Implement model-specific checks for task classification Ricardo Neri
2023-03-27 17:03 ` Rafael J. Wysocki
2023-03-29 0:15 ` Ricardo Neri
2023-03-29 12:21 ` Rafael J. Wysocki
2023-03-30 2:41 ` Ricardo Neri
2023-03-31 17:08 ` Rafael J. Wysocki
2023-04-03 14:12 ` Ricardo Neri
2023-02-07 5:11 ` [PATCH v3 22/24] x86/cpufeatures: Add feature bit for HRESET Ricardo Neri
2023-02-07 5:11 ` [PATCH v3 23/24] x86/hreset: Configure history reset Ricardo Neri
2023-02-07 5:11 ` [PATCH v3 24/24] x86/process: Reset hardware history in context switch Ricardo Neri
2023-03-05 22:49 ` [PATCH v3 00/24] sched: Introduce classes of tasks for load balance Ricardo Neri
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