github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-06-01 11:03:43 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

sched_ext: Add an event, SCX_EV_BYPASS_DURATION

Browse Source 
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>
This commit is contained in:
Changwoo Min 2025-02-04 14:20:54 +09:00 committed by Tejun Heo
parent 5c605cd33c
commit d46457c31c
1 changed files with 12 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
kernel/sched/ext.c
View File

@ -1468,6 +1468,11 @@ 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.
*/
@ -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);
}