diff options
author | Claudio Scordino <[email protected]> | 2017-11-14 12:19:26 +0100 |
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committer | Ingo Molnar <[email protected]> | 2017-11-16 09:00:35 +0100 |
commit | 5c0342ca7ef17220d8dd2da68d0d349c26ab19df (patch) | |
tree | 9de70d4c16ebd6c21ebc98774ff38cd3a99d3003 | |
parent | b29c6ef7bb1257853c1e31616d84f55e561cf631 (diff) |
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]>
-rw-r--r-- | Documentation/scheduler/sched-deadline.txt | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/Documentation/scheduler/sched-deadline.txt b/Documentation/scheduler/sched-deadline.txt index e89e36ec15a5..8ce78f82ae23 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 |