From: Juri Lelli <juri.lelli@gmail.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: tglx@linutronix.de, mingo@redhat.com, rostedt@goodmis.org,
oleg@redhat.com, fweisbec@gmail.com, darren@dvhart.com,
johan.eker@ericsson.com, p.faure@akatech.ch,
linux-kernel@vger.kernel.org, claudio@evidence.eu.com,
michael@amarulasolutions.com, fchecconi@gmail.com,
tommaso.cucinotta@sssup.it, nicola.manica@disi.unitn.it,
luca.abeni@unitn.it, dhaval.giani@gmail.com, hgu1972@gmail.com,
paulmck@linux.vnet.ibm.com, raistlin@linux.it,
insop.song@gmail.com, liming.wang@windriver.com,
jkacur@redhat.com, harald.gustafsson@ericsson.com,
vincent.guittot@linaro.org,
bruce.ashfield@windriver.com--no-chain-reply-to
Subject: Re: [PATCH 06/14] sched: add period support for -deadline tasks.
Date: Tue, 15 Oct 2013 10:23:19 +0200 [thread overview]
Message-ID: <525CFB77.90201@gmail.com> (raw)
In-Reply-To: <20131014120724.GI3081@twins.programming.kicks-ass.net>
On 10/14/2013 02:07 PM, Peter Zijlstra wrote:
> On Mon, Oct 14, 2013 at 12:43:38PM +0200, Juri Lelli wrote:
>> From: Harald Gustafsson <harald.gustafsson@ericsson.com>
>>
>> Make it possible to specify a period (different or equal than
>> deadline) for -deadline tasks.
>
> Could we add a little blurb here as to why we'd want this?
>
> (I think I do, and I certainly know where to find the answer, but its
> better to have a more complete changelog).
>
Yes, I could amend the commit message in something like this:
Make it possible to specify a period (different or equal than deadline) for
-deadline tasks. Relative deadlines (D_i) are used on task arrivals to generate
new scheduling (absolute) deadlines as "d = t + D_i", and periods (P_i) to
postpone the scheduling deadlines as "d = d + P_i" when the budget is zero.
This is in general useful to model (and schedule) tasks that have slow
activation rates (long periods), but have to be scheduled soon once activated
(short deadlines).
What do you think?
Thanks,
- Juri
next prev parent reply other threads:[~2013-10-15 8:23 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-14 10:43 [PATCH 00/14] sched: SCHED_DEADLINE v8 Juri Lelli
2013-10-14 10:43 ` [PATCH 01/14] sched: add sched_class->task_dead Juri Lelli
2013-10-14 10:43 ` [PATCH 02/14] sched: add extended scheduling interface Juri Lelli
2013-10-14 10:43 ` [PATCH 03/14] sched: SCHED_DEADLINE structures & implementation Juri Lelli
2013-10-14 11:10 ` Peter Zijlstra
2013-10-14 13:05 ` Juri Lelli
2013-10-14 13:51 ` Peter Zijlstra
2013-10-14 11:18 ` Peter Zijlstra
2013-10-14 11:24 ` Peter Zijlstra
2013-10-14 14:36 ` Juri Lelli
2013-10-14 11:33 ` Peter Zijlstra
2013-10-14 16:16 ` Juri Lelli
2013-10-14 16:19 ` Peter Zijlstra
2013-10-14 11:44 ` Peter Zijlstra
2013-10-14 16:58 ` Juri Lelli
2013-10-14 17:34 ` Peter Zijlstra
2013-10-14 20:48 ` Juri Lelli
2013-10-14 11:49 ` Peter Zijlstra
2013-10-14 20:36 ` Juri Lelli
2013-10-14 11:51 ` Peter Zijlstra
2013-10-14 21:26 ` Juri Lelli
2013-10-14 10:43 ` [PATCH 04/14] sched: SCHED_DEADLINE SMP-related data structures & logic Juri Lelli
2013-10-14 12:03 ` Peter Zijlstra
2013-10-15 9:36 ` Juri Lelli
2013-10-15 10:35 ` Peter Zijlstra
2013-10-15 11:36 ` Juri Lelli
2013-10-17 16:49 ` [tip:sched/core] sched/rt: Add missing rmb() tip-bot for Peter Zijlstra
2013-10-14 10:43 ` [PATCH 05/14] sched: SCHED_DEADLINE avg_update accounting Juri Lelli
2013-10-14 10:43 ` [PATCH 06/14] sched: add period support for -deadline tasks Juri Lelli
2013-10-14 12:07 ` Peter Zijlstra
2013-10-15 8:23 ` Juri Lelli [this message]
2013-10-15 8:43 ` Peter Zijlstra
2013-10-14 10:43 ` [PATCH 07/14] sched: add schedstats " Juri Lelli
2013-10-14 12:08 ` Peter Zijlstra
2013-10-15 9:06 ` Juri Lelli
2013-10-14 10:43 ` [PATCH 08/14] sched: add latency tracing " Juri Lelli
2013-10-14 10:43 ` [PATCH 09/14] rtmutex: turn the plist into an rb-tree Juri Lelli
2013-10-14 10:43 ` [PATCH 10/14] sched: drafted deadline inheritance logic Juri Lelli
2013-10-14 10:43 ` [PATCH 11/14] sched: add bandwidth management for sched_dl Juri Lelli
2013-10-14 10:43 ` [PATCH 12/14] sched: make dl_bw a sub-quota of rt_bw Juri Lelli
2013-10-14 14:06 ` Ingo Molnar
2013-10-15 10:00 ` Juri Lelli
2013-10-15 10:26 ` Peter Zijlstra
2013-10-15 11:35 ` Juri Lelli
2013-10-15 12:25 ` Ingo Molnar
2013-10-15 12:35 ` Peter Zijlstra
2013-10-15 13:11 ` Ingo Molnar
2013-10-16 8:59 ` Peter Zijlstra
2013-10-16 9:19 ` Ingo Molnar
2013-10-14 10:43 ` [PATCH 13/14] sched: speed up -dl pushes with a push-heap Juri Lelli
2013-10-14 10:43 ` [PATCH 14/14] sched: add sched_dl documentation Juri Lelli
2013-10-14 10:53 ` [PATCH 00/14] sched: SCHED_DEADLINE v8 Juri Lelli
2013-10-14 12:24 ` Peter Zijlstra
2013-10-14 12:38 ` Ingo Molnar
2013-10-14 13:22 ` Peter Zijlstra
2013-10-14 13:36 ` Ingo Molnar
2013-10-14 13:50 ` Peter Zijlstra
-- strict thread matches above, loose matches on Subject: below --
2013-11-07 13:43 [PATCH 00/14] sched: SCHED_DEADLINE v9 Juri Lelli
2013-11-07 13:43 ` [PATCH 06/14] sched: add period support for -deadline tasks Juri Lelli
2013-02-11 18:50 [PATCH 00/14] sched: SCHED_DEADLINE v7 Juri Lelli
2013-02-11 18:50 ` [PATCH 06/14] sched: add period support for -deadline tasks Juri Lelli
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