From: Vineeth Pillai <vineeth@bitbyteword.org>
To: luca.abeni@santannapisa.it, Juri Lelli <juri.lelli@redhat.com>,
Daniel Bristot de Oliveira <bristot@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
Vincent Guittot <vincent.guittot@linaro.org>,
Steven Rostedt <rostedt@goodmis.org>,
Joel Fernandes <joel@joelfernandes.org>,
youssefesmat@google.com,
Dietmar Eggemann <dietmar.eggemann@arm.com>,
Ben Segall <bsegall@google.com>, Mel Gorman <mgorman@suse.de>,
Valentin Schneider <vschneid@redhat.com>
Cc: Vineeth Pillai <vineeth@bitbyteword.org>,
Jonathan Corbet <corbet@lwn.net>,
linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org
Subject: [PATCH v4 2/2] sched/deadline: Update GRUB description in the documentation
Date: Fri, 26 May 2023 12:10:45 -0400 [thread overview]
Message-ID: <20230526161045.2283530-1-vineeth@bitbyteword.org> (raw)
In-Reply-To: <20230526145519.2282062-2-vineeth@bitbyteword.org>
Update the details of GRUB to reflect the updated logic.
Signed-off-by: Vineeth Pillai (Google) <vineeth@bitbyteword.org>
---
Documentation/scheduler/sched-deadline.rst | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/Documentation/scheduler/sched-deadline.rst b/Documentation/scheduler/sched-deadline.rst
index 9d9be52f221a..d9f9f10c2191 100644
--- a/Documentation/scheduler/sched-deadline.rst
+++ b/Documentation/scheduler/sched-deadline.rst
@@ -203,12 +203,15 @@ Deadline Task Scheduling
- Total bandwidth (this_bw): this is the sum of all tasks "belonging" to the
runqueue, including the tasks in Inactive state.
+ - Maximum usable bandwidth (max_bw): This is the maximum bandwidth usable by
+ deadline tasks and is currently set to the RT capacity.
+
The algorithm reclaims the bandwidth of the tasks in Inactive state.
It does so by decrementing the runtime of the executing task Ti at a pace equal
to
- dq = -max{ Ui / Umax, (1 - Uinact - Uextra) } dt
+ dq = -(max{ Ui, (Umax - Uinact - Uextra) } / Umax) dt
where:
--
2.40.1
next prev parent reply other threads:[~2023-05-26 16:10 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-26 14:55 [PATCH v4 1/2] sched/deadline: Fix bandwidth reclaim equation in GRUB Vineeth Pillai
2023-05-26 14:55 ` [PATCH v4 2/2] sched/deadline: Update GRUB description in the documentation Vineeth Pillai
2023-05-26 16:10 ` Vineeth Pillai [this message]
2023-05-26 15:29 ` [PATCH v4 1/2] sched/deadline: Fix bandwidth reclaim equation in GRUB luca abeni
2023-05-26 15:55 ` Vineeth Remanan Pillai
2023-05-26 15:58 ` Vineeth Remanan Pillai
2023-05-26 16:15 ` Vineeth Remanan Pillai
2023-05-30 13:11 ` Daniel Bristot de Oliveira
2023-05-30 13:22 ` Vineeth Remanan Pillai
2023-05-26 16:09 ` Vineeth Pillai
2023-06-02 18:40 ` Joel Fernandes
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