Messages in this thread | | | From | Vincent Guittot <> | Subject | [PATCH v7 0/2] sched/fair: update scale invariance of PELT | Date | Tue, 20 Nov 2018 11:55:06 +0100 |
| |
This new version of the scale invariance patchset adds an important change compare to v3 and before. It still scales the time to reflect the amount of work that has been done during the elapsed running time but this is now done at rq level instead of per entity and rt/dl/cfs_rq. The main advantage is that it is done once per clock update and we don't need to maintain per sched_avg's stolen_idle_time anymore. This also ensures that all pelt signals will be always synced for a rq.
The 1st patch makes available rq_of() helper function for pelt.c file and the 2nd patch implements the new scaling algorithm
Changes since v5: - Fix niptick raised by Dietmar - Upodated some comments - Remove some unused variables - No functional change
Vincent Guittot (2): sched/fair: move rq_of helper function sched/fair: update scale invariance of PELT
include/linux/sched.h | 23 +++------- kernel/sched/core.c | 1 + kernel/sched/deadline.c | 6 +-- kernel/sched/fair.c | 58 +++++++++++-------------- kernel/sched/pelt.c | 45 +++++++++++--------- kernel/sched/pelt.h | 111 ++++++++++++++++++++++++++++++++++++++++++++++-- kernel/sched/rt.c | 6 +-- kernel/sched/sched.h | 21 ++++++++- 8 files changed, 190 insertions(+), 81 deletions(-)
-- 2.7.4
| |