Signed-off-by: Claudio Scordino <[email protected]>
Signed-off-by: Luca Abeni <[email protected]>
Acked-by: Daniel Bristot de Oliveira <[email protected]>
CC: Jonathan Corbet <[email protected]>
CC: "Peter Zijlstra (Intel)" <[email protected]>
CC: Ingo Molnar <[email protected]>
CC: [email protected]
Cc: Tommaso Cucinotta <[email protected]>
Cc: Mathieu Poirier <[email protected]>
---
Documentation/scheduler/sched-deadline.txt | 13 ++++++++++---
1 file changed, 10 insertions(+), 3 deletions(-)
diff --git a/Documentation/scheduler/sched-deadline.txt b/Documentation/scheduler/sched-deadline.txt
index e89e36e..8ce78f8 100644
--- a/Documentation/scheduler/sched-deadline.txt
+++ b/Documentation/scheduler/sched-deadline.txt
@@ -204,10 +204,17 @@ CONTENTS
It does so by decrementing the runtime of the executing task Ti at a pace equal
to
- dq = -max{ Ui, (1 - Uinact) } dt
+ dq = -max{ Ui / Umax, (1 - Uinact - Uextra) } dt
- where Uinact is the inactive utilization, computed as (this_bq - running_bw),
- and Ui is the bandwidth of task Ti.
+ where:
+
+ - Ui is the bandwidth of task Ti;
+ - Umax is the maximum reclaimable utilization (subjected to RT throttling
+ limits);
+ - Uinact is the (per runqueue) inactive utilization, computed as
+ (this_bq - running_bw);
+ - Uextra is the (per runqueue) extra reclaimable utilization
+ (subjected to RT throttling limits).
Let's now see a trivial example of two deadline tasks with runtime equal
--
2.7.4
From 1584208119662771938@xxx Thu Nov 16 07:49:55 +0000 2017
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Commit-ID: 5c0342ca7ef17220d8dd2da68d0d349c26ab19df
Gitweb: https://git.kernel.org/tip/5c0342ca7ef17220d8dd2da68d0d349c26ab19df
Author: Claudio Scordino <[email protected]>
AuthorDate: Tue, 14 Nov 2017 12:19:26 +0100
Committer: Ingo Molnar <[email protected]>
CommitDate: Thu, 16 Nov 2017 09:00:35 +0100
sched/deadline: Fix the description of runtime accounting in the documentation
Signed-off-by: Claudio Scordino <[email protected]>
Signed-off-by: Luca Abeni <[email protected]>
Acked-by: Daniel Bristot de Oliveira <[email protected]>
Acked-by: Peter Zijlstra <[email protected]>
Cc: Jonathan Corbet <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Mathieu Poirier <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Tommaso Cucinotta <[email protected]>
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
---
Documentation/scheduler/sched-deadline.txt | 13 ++++++++++---
1 file changed, 10 insertions(+), 3 deletions(-)
diff --git a/Documentation/scheduler/sched-deadline.txt b/Documentation/scheduler/sched-deadline.txt
index e89e36e..8ce78f8 100644
--- a/Documentation/scheduler/sched-deadline.txt
+++ b/Documentation/scheduler/sched-deadline.txt
@@ -204,10 +204,17 @@ CONTENTS
It does so by decrementing the runtime of the executing task Ti at a pace equal
to
- dq = -max{ Ui, (1 - Uinact) } dt
+ dq = -max{ Ui / Umax, (1 - Uinact - Uextra) } dt
- where Uinact is the inactive utilization, computed as (this_bq - running_bw),
- and Ui is the bandwidth of task Ti.
+ where:
+
+ - Ui is the bandwidth of task Ti;
+ - Umax is the maximum reclaimable utilization (subjected to RT throttling
+ limits);
+ - Uinact is the (per runqueue) inactive utilization, computed as
+ (this_bq - running_bw);
+ - Uextra is the (per runqueue) extra reclaimable utilization
+ (subjected to RT throttling limits).
Let's now see a trivial example of two deadline tasks with runtime equal
From 1583931646354179781@xxx Mon Nov 13 06:35:30 +0000 2017
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