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| author | Tommaso Cucinotta <tommaso.cucinotta@sssup.it> | 2016-10-26 12:17:17 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-01-14 13:30:00 +0300 |
| commit | 59f8c2989283bbd3df9fcfb22494d84f4852e536 (patch) | |
| tree | 4a55cf07c8d352fde4e7222c0241de2e83adf7ad /Documentation | |
| parent | 5680d8094ffa9e5cfc81afdd865027ee6417c263 (diff) | |
| download | linux-59f8c2989283bbd3df9fcfb22494d84f4852e536.tar.xz | |
sched/deadline: Show leftover runtime and abs deadline in /proc/*/sched
This patch allows for reading the current (leftover) runtime and
absolute deadline of a SCHED_DEADLINE task through /proc/*/sched
(entries dl.runtime and dl.deadline), while debugging/testing.
Signed-off-by: Tommaso Cucinotta <tommaso.cucinotta@sssup.it>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Juri Lelli <juri.lelli@arm.com>
Reviewed-by: Luca Abeni <luca.abeni@unitn.it>
Acked-by: Daniel Bistrot de Oliveira <danielbristot@gmail.com>
Cc: Juri Lelli <juri.lelli@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1477473437-10346-2-git-send-email-tommaso.cucinotta@sssup.it
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/scheduler/sched-deadline.txt | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/scheduler/sched-deadline.txt b/Documentation/scheduler/sched-deadline.txt index 8e37b0ba2c9d..cbc1b46cbf70 100644 --- a/Documentation/scheduler/sched-deadline.txt +++ b/Documentation/scheduler/sched-deadline.txt @@ -408,6 +408,11 @@ CONTENTS * the new scheduling related syscalls that manipulate it, i.e., sched_setattr() and sched_getattr() are implemented. + For debugging purposes, the leftover runtime and absolute deadline of a + SCHED_DEADLINE task can be retrieved through /proc/<pid>/sched (entries + dl.runtime and dl.deadline, both values in ns). A programmatic way to + retrieve these values from production code is under discussion. + 4.3 Default behavior --------------------- @@ -476,6 +481,7 @@ CONTENTS Still missing: + - programmatic way to retrieve current runtime and absolute deadline - refinements to deadline inheritance, especially regarding the possibility of retaining bandwidth isolation among non-interacting tasks. This is being studied from both theoretical and practical points of view, and |