From 4a55b45036a677fac43fe81ddf7fdcd007aaaee7 Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Wed, 5 Sep 2007 14:32:49 +0200 Subject: [PATCH] sched: improve prev_sum_exec_runtime setting Second preparatory patch for fix-ideal runtime: Mark prev_sum_exec_runtime at the beginning of our run, the same spot that adds our wait period to wait_runtime. This seems a more natural location to do this, and it also reduces the code a bit: text data bss dec hex filename 13397 228 1204 14829 39ed sched.o.before 13391 228 1204 14823 39e7 sched.o.after Signed-off-by: Peter Zijlstra Signed-off-by: Ingo Molnar --- kernel/sched_fair.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c index f0dd4be1a3a4..2d01bbc2d04a 100644 --- a/kernel/sched_fair.c +++ b/kernel/sched_fair.c @@ -684,10 +684,8 @@ __check_preempt_curr_fair(struct cfs_rq *cfs_rq, struct sched_entity *se, * preempt the current task unless the best task has * a larger than sched_granularity fairness advantage: */ - if (__delta > niced_granularity(curr, granularity)) { + if (__delta > niced_granularity(curr, granularity)) resched_task(rq_of(cfs_rq)->curr); - curr->prev_sum_exec_runtime = curr->sum_exec_runtime; - } } static inline void @@ -703,6 +701,7 @@ set_next_entity(struct cfs_rq *cfs_rq, struct sched_entity *se) update_stats_wait_end(cfs_rq, se); update_stats_curr_start(cfs_rq, se); set_cfs_rq_curr(cfs_rq, se); + se->prev_sum_exec_runtime = se->sum_exec_runtime; } static struct sched_entity *pick_next_entity(struct cfs_rq *cfs_rq) -- 2.20.1