From: Daniel Bristot de Oliveira <bristot@kernel.org>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Daniel Bristot de Oliveira <bristot@redhat.com>,
Steven Rostedt <rostedt@goodmis.org>,
Joel Fernandes <joel@joelfernandes.org>,
Ingo Molnar <mingo@redhat.com>,
Juri Lelli <juri.lelli@redhat.com>,
Vincent Guittot <vincent.guittot@linaro.org>,
Dietmar Eggemann <dietmar.eggemann@arm.com>,
Ben Segall <bsegall@google.com>, Mel Gorman <mgorman@suse.de>,
Valentin Schneider <vschneid@redhat.com>,
linux-kernel@vger.kernel.org,
Luca Abeni <luca.abeni@santannapisa.it>,
Tommaso Cucinotta <tommaso.cucinotta@santannapisa.it>,
Thomas Gleixner <tglx@linutronix.de>,
Vineeth Pillai <vineeth@bitbyteword.org>,
Shuah Khan <skhan@linuxfoundation.org>,
Phil Auld <pauld@redhat.com>
Subject: Re: [PATCH v5 6/7] sched/deadline: Deferrable dl server
Date: Wed, 8 Nov 2023 14:46:21 +0100 [thread overview]
Message-ID: <599225f2-9a51-4a95-bbe8-58a5febfe80b@kernel.org> (raw)
In-Reply-To: <20231108124401.GQ8262@noisy.programming.kicks-ass.net>
On 11/8/23 13:44, Peter Zijlstra wrote:
> Because the above also causes period drift, which we do not want.
The period drift is not a problem when we do not have DL tasks because
... we do not have dl tasks. The task will run for runtime.
But not doing the period drift is bad if we have DL tasks because we
break the (current u <= U) rule... which breaks CBS/EDF.
next prev parent reply other threads:[~2023-11-08 13:46 UTC|newest]
Thread overview: 76+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-04 10:59 [PATCH v5 0/7] SCHED_DEADLINE server infrastructure Daniel Bristot de Oliveira
2023-11-04 10:59 ` [PATCH v5 1/7] sched: Unify runtime accounting across classes Daniel Bristot de Oliveira
2023-11-15 9:04 ` [tip: sched/core] " tip-bot2 for Peter Zijlstra
2023-11-04 10:59 ` [PATCH v5 2/7] sched/deadline: Collect sched_dl_entity initialization Daniel Bristot de Oliveira
2023-11-15 9:04 ` [tip: sched/core] " tip-bot2 for Peter Zijlstra
2023-11-04 10:59 ` [PATCH v5 3/7] sched/deadline: Move bandwidth accounting into {en,de}queue_dl_entity Daniel Bristot de Oliveira
2023-11-15 9:04 ` [tip: sched/core] " tip-bot2 for Peter Zijlstra
2023-11-04 10:59 ` [PATCH v5 4/7] sched/deadline: Introduce deadline servers Daniel Bristot de Oliveira
2023-11-15 9:04 ` [tip: sched/core] " tip-bot2 for Peter Zijlstra
2023-11-04 10:59 ` [PATCH v5 5/7] sched/fair: Add trivial fair server Daniel Bristot de Oliveira
2023-11-06 14:24 ` Peter Zijlstra
2023-11-06 14:26 ` Daniel Bristot de Oliveira
2023-11-04 10:59 ` [PATCH v5 6/7] sched/deadline: Deferrable dl server Daniel Bristot de Oliveira
2023-11-06 14:55 ` Peter Zijlstra
2023-11-06 17:05 ` Daniel Bristot de Oliveira
2023-11-06 19:32 ` Joel Fernandes
2023-11-06 21:32 ` Joel Fernandes
2023-11-06 21:37 ` Joel Fernandes
2023-11-07 11:58 ` Daniel Bristot de Oliveira
2023-11-08 2:42 ` Joel Fernandes
2023-11-07 16:47 ` Steven Rostedt
2023-11-07 17:35 ` Steven Rostedt
2023-11-07 17:46 ` Steven Rostedt
2023-11-07 17:54 ` Steven Rostedt
2023-11-07 19:32 ` Steven Rostedt
2023-11-07 20:07 ` Steven Rostedt
2023-11-07 17:37 ` Daniel Bristot de Oliveira
2023-11-07 18:50 ` Daniel Bristot de Oliveira
2023-11-08 3:20 ` Joel Fernandes
2023-11-08 8:01 ` Daniel Bristot de Oliveira
2023-11-08 18:25 ` Joel Fernandes
2023-11-08 12:44 ` Peter Zijlstra
2023-11-08 12:50 ` Peter Zijlstra
2023-11-08 14:52 ` Daniel Bristot de Oliveira
2023-11-08 13:46 ` Daniel Bristot de Oliveira [this message]
2023-11-08 13:58 ` Daniel Bristot de Oliveira
2023-11-08 15:14 ` Juri Lelli
2023-11-08 16:57 ` Peter Zijlstra
2023-11-08 2:37 ` Joel Fernandes
2023-11-07 7:30 ` Daniel Bristot de Oliveira
2023-11-07 16:37 ` Steven Rostedt
2023-11-13 15:05 ` kernel test robot
2024-03-20 0:03 ` Joel Fernandes
2024-03-20 19:24 ` Daniel Bristot de Oliveira
2024-03-21 16:15 ` Joel Fernandes
2024-03-23 14:37 ` Joel Fernandes
2024-04-05 14:35 ` Daniel Bristot de Oliveira
2024-04-08 17:11 ` Steven Rostedt
2023-11-04 10:59 ` [PATCH v5 7/7] sched/fair: Fair server interface Daniel Bristot de Oliveira
2023-11-04 15:18 ` kernel test robot
2023-11-05 0:55 ` kernel test robot
2023-11-06 15:40 ` Peter Zijlstra
2023-11-06 16:29 ` Daniel Bristot de Oliveira
2023-11-07 8:16 ` Peter Zijlstra
2023-11-07 14:06 ` Daniel Bristot de Oliveira
2023-11-07 14:44 ` Peter Zijlstra
2023-11-07 12:38 ` Peter Zijlstra
2023-11-07 13:24 ` Daniel Bristot de Oliveira
2024-01-19 1:49 ` Joel Fernandes
2024-01-19 1:55 ` Joel Fernandes
2024-01-22 14:14 ` Daniel Bristot de Oliveira
2024-01-23 15:39 ` Joel Fernandes
2024-01-23 15:44 ` Joel Fernandes
2024-02-13 2:13 ` Joel Fernandes
2024-02-13 2:21 ` Joel Fernandes
2024-02-14 14:23 ` Daniel Bristot de Oliveira
2024-02-15 13:57 ` Joel Fernandes
2024-02-15 17:27 ` Daniel Bristot de Oliveira
2024-02-15 17:41 ` Joel Fernandes
2024-04-04 17:43 ` Daniel Bristot de Oliveira
2023-12-08 21:47 ` [PATCH v5 0/7] SCHED_DEADLINE server infrastructure Joel Fernandes
2024-02-19 7:33 ` Huang, Ying
2024-02-19 10:23 ` Daniel Bristot de Oliveira
2024-02-20 3:28 ` Huang, Ying
2024-02-20 8:31 ` Daniel Bristot de Oliveira
2024-02-20 8:41 ` Huang, Ying
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