From: Thara Gopinath <thara.gopinath@linaro.org>
To: Dietmar Eggemann <dietmar.eggemann@arm.com>,
Peter Zijlstra <peterz@infradead.org>
Cc: mingo@redhat.com, ionela.voinescu@arm.com,
vincent.guittot@linaro.org, rui.zhang@intel.com,
qperret@google.com, daniel.lezcano@linaro.org,
viresh.kumar@linaro.org, linux-kernel@vger.kernel.org,
amit.kachhap@gmail.com, javi.merino@kernel.org,
amit.kucheria@verdurent.com
Subject: Re: [Patch v8 1/7] sched/pelt: Add support to track thermal pressure
Date: Fri, 24 Jan 2020 14:07:06 -0500 [thread overview]
Message-ID: <5E2B405A.7040405@linaro.org> (raw)
In-Reply-To: <e5ecad29-11d8-e7ff-27ff-b63ca44fdcd3@arm.com>
On 01/23/2020 02:15 PM, Dietmar Eggemann wrote:
> On 16/01/2020 16:17, Peter Zijlstra wrote:
>> On Tue, Jan 14, 2020 at 02:57:33PM -0500, Thara Gopinath wrote:
>>
>>> diff --git a/kernel/sched/pelt.h b/kernel/sched/pelt.h
>>> index afff644..bf1e17b 100644
>>> --- a/kernel/sched/pelt.h
>>> +++ b/kernel/sched/pelt.h
>>> @@ -7,6 +7,16 @@ int __update_load_avg_cfs_rq(u64 now, struct cfs_rq *cfs_rq);
>>> int update_rt_rq_load_avg(u64 now, struct rq *rq, int running);
>>> int update_dl_rq_load_avg(u64 now, struct rq *rq, int running);
>>>
>>> +#ifdef CONFIG_HAVE_SCHED_THERMAL_PRESSURE
>
> I assume your plan is to enable this for Arm and Arm64? Otherwise the
> code in 3/7 should also be guarded by this.
Yes. I think it should be enabled for arm and arm64. I can submit a
patch after this series is accepted to enable it.
Nevertheless , I don't understand why is patch 3/7 tied with this.
This portion is the averaging of thermal pressure. Patch 3/7 is to store
and retrieve the instantaneous value.
>
> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
> index e688dfad0b72..9eb414b2c8b9 100644
> --- a/arch/arm64/Kconfig
> +++ b/arch/arm64/Kconfig
> @@ -164,6 +164,7 @@ config ARM64
> select HAVE_FUNCTION_ARG_ACCESS_API
> select HAVE_RCU_TABLE_FREE
> select HAVE_RSEQ
> + select HAVE_SCHED_THERMAL_PRESSURE
> select HAVE_STACKPROTECTOR
> select HAVE_SYSCALL_TRACEPOINTS
>
> Currently it lives in the 'CPU/Task time and stats accounting' of
> .config which doesn't feel right to me.
It is cpu statistics if you think about it. It is also the same .config
where CONFIG_HAVE_SCHED_AVG_IRQ is defined.
>
> [...]
>
--
Warm Regards
Thara
next prev parent reply other threads:[~2020-01-24 19:07 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-14 19:57 [Patch v8 0/7] Introduce Thermal Pressure Thara Gopinath
2020-01-14 19:57 ` [Patch v8 1/7] sched/pelt: Add support to track thermal pressure Thara Gopinath
2020-01-16 15:17 ` Peter Zijlstra
2020-01-23 19:15 ` Dietmar Eggemann
2020-01-24 19:07 ` Thara Gopinath [this message]
2020-01-27 9:28 ` Dietmar Eggemann
2020-01-28 13:32 ` Thara Gopinath
2020-01-28 16:15 ` Dietmar Eggemann
2020-02-13 12:03 ` Amit Kucheria
2020-02-13 12:31 ` Amit Kucheria
2020-01-14 19:57 ` [Patch v8 2/7] sched/topology: Add hook to read per cpu " Thara Gopinath
2020-01-14 19:57 ` [Patch v8 3/7] arm,arm64,drivers:Add infrastructure to store and update instantaneous " Thara Gopinath
2020-01-14 19:57 ` [Patch v8 4/7] sched/fair: Enable periodic update of average " Thara Gopinath
2020-01-16 15:15 ` Peter Zijlstra
2020-01-17 11:40 ` Quentin Perret
2020-01-17 12:31 ` Peter Zijlstra
2020-01-17 13:17 ` Vincent Guittot
2020-01-17 13:45 ` Quentin Perret
2020-01-17 13:22 ` Vincent Guittot
2020-01-17 14:55 ` Peter Zijlstra
2020-01-17 15:39 ` Vincent Guittot
2020-01-24 15:37 ` Dietmar Eggemann
2020-01-24 15:45 ` Vincent Guittot
2020-01-27 12:09 ` Dietmar Eggemann
2020-01-27 15:15 ` Vincent Guittot
2020-01-29 15:41 ` Dietmar Eggemann
2020-01-30 9:49 ` Vincent Guittot
2020-01-17 20:20 ` Thara Gopinath
2020-01-14 19:57 ` [Patch v8 5/7] sched/fair: update cpu_capacity to reflect " Thara Gopinath
2020-01-14 19:57 ` [Patch v8 6/7] thermal/cpu-cooling: Update thermal pressure in case of a maximum frequency capping Thara Gopinath
2020-01-14 19:57 ` [Patch v8 7/7] sched/fair: Enable tuning of decay period Thara Gopinath
2020-01-17 11:47 ` Quentin Perret
2020-01-17 15:45 ` Thara Gopinath
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