diff options
| author | Abel Wu <wuyun.abel@bytedance.com> | 2023-11-15 11:36:45 +0800 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2023-11-15 09:57:47 +0100 |
| commit | 2227a957e1d5b1941be4e4207879ec74f4bb37f8 (patch) | |
| tree | 18eb90d421aaed3b3ec423387504eaccc56d44d4 /kernel/sched/debug.c | |
| parent | 84db47ca7146d7bd00eb5cf2b93989a971c84650 (diff) | |
sched/eevdf: Sort the rbtree by virtual deadline
Sort the task timeline by virtual deadline and keep the min_vruntime
in the augmented tree, so we can avoid doubling the worst case cost
and make full use of the cached leftmost node to enable O(1) fastpath
picking in next patch.
Signed-off-by: Abel Wu <wuyun.abel@bytedance.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20231115033647.80785-3-wuyun.abel@bytedance.com
Diffstat (limited to 'kernel/sched/debug.c')
| -rw-r--r-- | kernel/sched/debug.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c index 4580a450700e..168eecc209b4 100644 --- a/kernel/sched/debug.c +++ b/kernel/sched/debug.c @@ -628,8 +628,8 @@ static void print_rq(struct seq_file *m, struct rq *rq, int rq_cpu) void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq) { - s64 left_vruntime = -1, min_vruntime, right_vruntime = -1, spread; - struct sched_entity *last, *first; + s64 left_vruntime = -1, min_vruntime, right_vruntime = -1, left_deadline = -1, spread; + struct sched_entity *last, *first, *root; struct rq *rq = cpu_rq(cpu); unsigned long flags; @@ -644,15 +644,20 @@ void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq) SPLIT_NS(cfs_rq->exec_clock)); raw_spin_rq_lock_irqsave(rq, flags); + root = __pick_root_entity(cfs_rq); + if (root) + left_vruntime = root->min_vruntime; first = __pick_first_entity(cfs_rq); if (first) - left_vruntime = first->vruntime; + left_deadline = first->deadline; last = __pick_last_entity(cfs_rq); if (last) right_vruntime = last->vruntime; min_vruntime = cfs_rq->min_vruntime; raw_spin_rq_unlock_irqrestore(rq, flags); + SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "left_deadline", + SPLIT_NS(left_deadline)); SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "left_vruntime", SPLIT_NS(left_vruntime)); SEQ_printf(m, " .%-30s: %Ld.%06ld\n", "min_vruntime", |