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| author | Harald Gustafsson <harald.gustafsson@ericsson.com> | 2013-11-07 17:43:40 +0400 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2014-01-13 16:41:09 +0400 |
| commit | 755378a47192a3d1f7c3a8ca6c15c1cf76de0af2 (patch) | |
| tree | b5154fe4b499081b76958894bae2c6fa696c1925 /include/linux/sched.h | |
| parent | 239be4a982154ea0c979fca5846349bb68973aed (diff) | |
| download | linux-755378a47192a3d1f7c3a8ca6c15c1cf76de0af2.tar.xz | |
sched/deadline: Add period support for SCHED_DEADLINE tasks
Make it possible to specify a period (different or equal than
deadline) for -deadline tasks. Relative deadlines (D_i) are used on
task arrivals to generate new scheduling (absolute) deadlines as "d =
t + D_i", and periods (P_i) to postpone the scheduling deadlines as "d
= d + P_i" when the budget is zero.
This is in general useful to model (and schedule) tasks that have slow
activation rates (long periods), but have to be scheduled soon once
activated (short deadlines).
Signed-off-by: Harald Gustafsson <harald.gustafsson@ericsson.com>
Signed-off-by: Dario Faggioli <raistlin@linux.it>
Signed-off-by: Juri Lelli <juri.lelli@gmail.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1383831828-15501-7-git-send-email-juri.lelli@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/sched.h')
| -rw-r--r-- | include/linux/sched.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index cc66f2615a6d..158f4c2dd852 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -1102,6 +1102,7 @@ struct sched_dl_entity { */ u64 dl_runtime; /* maximum runtime for each instance */ u64 dl_deadline; /* relative deadline of each instance */ + u64 dl_period; /* separation of two instances (period) */ /* * Actual scheduling parameters. Initialized with the values above, |