diff options
| author | Changwoo Min <changwoo@igalia.com> | 2025-02-04 14:20:54 +0900 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2025-02-04 10:36:47 -1000 |
| commit | d46457c31c432b6b717dcaebab634d5126e2969a (patch) | |
| tree | 3045f24f2c89d3c7adea3ffad8a45f0aa2322b85 | |
| parent | 5c605cd33cad957f3eff747e088d07db23808080 (diff) | |
sched_ext: Add an event, SCX_EV_BYPASS_DURATION
Add a core event, SCX_EV_BYPASS_DURATION, which represents the
total duration of bypass modes in nanoseconds.
Signed-off-by: Changwoo Min <changwoo@igalia.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
| -rw-r--r-- | kernel/sched/ext.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/kernel/sched/ext.c b/kernel/sched/ext.c index 0ed2db44ae33..8a9a30895381 100644 --- a/kernel/sched/ext.c +++ b/kernel/sched/ext.c @@ -1469,6 +1469,11 @@ struct scx_event_stats { u64 SCX_EV_ENQ_SKIP_EXITING; /* + * The total duration of bypass modes in nanoseconds. + */ + u64 SCX_EV_BYPASS_DURATION; + + /* * The number of tasks dispatched in the bypassing mode. */ u64 SCX_EV_BYPASS_DISPATCH; @@ -4408,6 +4413,8 @@ static void scx_clear_softlockup(void) static void scx_ops_bypass(bool bypass) { static DEFINE_RAW_SPINLOCK(bypass_lock); + static unsigned long bypass_timestamp; + int cpu; unsigned long flags; @@ -4417,12 +4424,15 @@ static void scx_ops_bypass(bool bypass) WARN_ON_ONCE(scx_ops_bypass_depth <= 0); if (scx_ops_bypass_depth != 1) goto unlock; + bypass_timestamp = ktime_get_ns(); scx_add_event(SCX_EV_BYPASS_ACTIVATE, 1); } else { scx_ops_bypass_depth--; WARN_ON_ONCE(scx_ops_bypass_depth < 0); if (scx_ops_bypass_depth != 0) goto unlock; + scx_add_event(SCX_EV_BYPASS_DURATION, + ktime_get_ns() - bypass_timestamp); } atomic_inc(&scx_ops_breather_depth); @@ -5013,6 +5023,7 @@ static void scx_dump_state(struct scx_exit_info *ei, size_t dump_len) scx_dump_event(s, &events, SCX_EV_DISPATCH_LOCAL_DSQ_OFFLINE); scx_dump_event(s, &events, SCX_EV_DISPATCH_KEEP_LAST); scx_dump_event(s, &events, SCX_EV_ENQ_SKIP_EXITING); + scx_dump_event(s, &events, SCX_EV_BYPASS_DURATION); scx_dump_event(s, &events, SCX_EV_BYPASS_DISPATCH); scx_dump_event(s, &events, SCX_EV_BYPASS_ACTIVATE); @@ -7152,6 +7163,7 @@ __bpf_kfunc void scx_bpf_events(struct scx_event_stats *events, scx_agg_event(&e_sys, e_cpu, SCX_EV_DISPATCH_LOCAL_DSQ_OFFLINE); scx_agg_event(&e_sys, e_cpu, SCX_EV_DISPATCH_KEEP_LAST); scx_agg_event(&e_sys, e_cpu, SCX_EV_ENQ_SKIP_EXITING); + scx_agg_event(&e_sys, e_cpu, SCX_EV_BYPASS_DURATION); scx_agg_event(&e_sys, e_cpu, SCX_EV_BYPASS_DISPATCH); scx_agg_event(&e_sys, e_cpu, SCX_EV_BYPASS_ACTIVATE); } |