From: Dietmar Eggemann <dietmar.eggemann@arm.com>
To: Vincent Guittot <vincent.guittot@linaro.org>,
Juri Lelli <juri.lelli@gmail.com>
Cc: migueldedios@google.com, "Cc: Steve Muckle" <smuckle@google.com>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
linux-kernel <linux-kernel@vger.kernel.org>,
"Cc: Android Kernel" <kernel-team@android.com>,
Todd Kjos <tkjos@google.com>, Paul Turner <pjt@google.com>,
Quentin Perret <quentin.perret@arm.com>,
Patrick Bellasi <Patrick.Bellasi@arm.com>,
Chris Redpath <Chris.Redpath@arm.com>,
Morten Rasmussen <Morten.Rasmussen@arm.com>,
John Dias <joaodias@google.com>
Subject: Re: [PATCH] sched/fair: vruntime should normalize when switching from fair
Date: Mon, 10 Sep 2018 23:24:49 -0700 [thread overview]
Message-ID: <da0a0480-15dd-1fd3-7da9-6b60955ae729@arm.com> (raw)
In-Reply-To: <CAKfTPtCpqhQAMeQnUtuePbris0vyjmzfXo40zdprffqh9Pwv=A@mail.gmail.com>
On 09/07/2018 12:58 AM, Vincent Guittot wrote:
> On Fri, 7 Sep 2018 at 09:16, Juri Lelli <juri.lelli@gmail.com> wrote:
>>
>> On 06/09/18 16:25, Dietmar Eggemann wrote:
>>> Hi Juri,
>>>
>>> On 08/23/2018 11:54 PM, Juri Lelli wrote:
>>>> On 23/08/18 18:52, Dietmar Eggemann wrote:
>>>>> Hi,
>>>>>
>>>>> On 08/21/2018 01:54 AM, Miguel de Dios wrote:
>>>>>> On 08/17/2018 11:27 AM, Steve Muckle wrote:
>>>>>>> From: John Dias <joaodias@google.com>
[...]
>>> Adding semaphores is possible but rt-app has no easy way to initialize
>>> individual objects, e.g. sem_init(..., value). The only way I see is via the
>>> global section, like "pi_enabled". But then, this is true for all objects of
>>> this kind (in this case mutexes)?
>>
>> Right, global section should work fine. Why do you think this is a
>> problem/limitation?
>
> keep in mind that rt-app still have "ressources" section. This one is
> optional and almost never used as resources can be created on the fly
> but it's still there and can be used to initialize resources if needed
> like semaphore
I wasn't aware of that but this will do the job AFAICS. I just have to
re-introduce the direct calls to init_foo_resource() (in this case
init_sem_resource()) in init_resource_data() and call that instead of
init_resource_data() for semaphores listed in the global resources section.
Example for a semaphore b_sem with initial value eq. 1:
"resources" : {
"b_sem" : { "type" : "sem_wait", "value" : 1 }
}
[...]
next prev parent reply other threads:[~2018-09-11 6:25 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-17 18:27 [PATCH] sched/fair: vruntime should normalize when switching from fair Steve Muckle
2018-08-20 23:54 ` Miguel de Dios
2018-08-23 16:52 ` Dietmar Eggemann
2018-08-24 6:54 ` Juri Lelli
2018-08-24 21:17 ` Steve Muckle
2018-09-06 23:25 ` Dietmar Eggemann
2018-09-07 7:16 ` Juri Lelli
2018-09-07 7:58 ` Vincent Guittot
2018-09-11 6:24 ` Dietmar Eggemann [this message]
2018-08-24 9:32 ` Peter Zijlstra
2018-08-24 9:47 ` Peter Zijlstra
2018-08-24 21:24 ` Steve Muckle
2018-08-27 11:14 ` Peter Zijlstra
2018-08-28 14:53 ` Dietmar Eggemann
2018-08-29 10:54 ` Dietmar Eggemann
2018-08-29 11:59 ` Peter Zijlstra
2018-08-29 15:33 ` Dietmar Eggemann
2018-08-31 22:24 ` Steve Muckle
2018-09-26 9:50 ` Wanpeng Li
2018-09-26 22:38 ` Dietmar Eggemann
2018-09-27 1:19 ` Wanpeng Li
2018-09-27 13:22 ` Dietmar Eggemann
2018-09-28 0:43 ` Wanpeng Li
2018-09-28 16:10 ` Steve Muckle
2018-09-28 16:45 ` Joel Fernandes
2018-09-28 17:35 ` Dietmar Eggemann
2018-09-29 1:07 ` Wanpeng Li
2018-09-28 17:11 ` Dietmar Eggemann
2018-09-28 16:43 ` Joel Fernandes
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