github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-06-02 11:33:28 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

sched_ext: Add an event, SCX_EV_ENQ_SKIP_EXITING

Browse Source 
Add a core event, SCX_EV_ENQ_SKIP_EXITING, which represents how many
times a task is enqueued to a local DSQ when exiting if
SCX_OPS_ENQ_EXITING is not set.

__scx_add_event() is used since the caller holds an rq lock,
so the preemption has already been disabled.

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 14:20:51 +09:00 committed by Tejun Heo
parent 7125660bc1
commit 824d4f2dce
1 changed files with 11 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
kernel/sched/ext.c
View File

@ -1461,6 +1461,12 @@ struct scx_event_stats {
* continued to run because there were no other tasks on the CPU.
*/
u64 SCX_EV_DISPATCH_KEEP_LAST;
/*
* If SCX_OPS_ENQ_EXITING is not set, the number of times that a task
* is dispatched to a local DSQ when exiting.
*/
u64 SCX_EV_ENQ_SKIP_EXITING;
};
/*
@ -2068,8 +2074,10 @@ static void do_enqueue_task(struct rq *rq, struct task_struct *p, u64 enq_flags,
/* see %SCX_OPS_ENQ_EXITING */
if (!static_branch_unlikely(&scx_ops_enq_exiting) &&
unlikely(p->flags & PF_EXITING))
unlikely(p->flags & PF_EXITING)) {
__scx_add_event(SCX_EV_ENQ_SKIP_EXITING, 1);
goto local;
}
if (!SCX_HAS_OP(enqueue))
goto global;
@ -4985,6 +4993,7 @@ static void scx_dump_state(struct scx_exit_info *ei, size_t dump_len)
scx_dump_event(s, &events, SCX_EV_SELECT_CPU_FALLBACK);
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);
if (seq_buf_has_overflowed(&s) && dump_len >= sizeof(trunc_marker))
memcpy(ei->dump + dump_len - sizeof(trunc_marker),
@ -7121,6 +7130,7 @@ __bpf_kfunc void scx_bpf_events(struct scx_event_stats *events,
scx_agg_event(&e_sys, e_cpu, SCX_EV_SELECT_CPU_FALLBACK);
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);
}
/*