[PATCH v2 10/11] sched_ext: Add scx_bpf_event_stats() and scx_read_event() for BPF schedulers

Changwoo Min
2025-01-26T10:17:04Z

scx_bpf_event_stats() is added to the header files so the BPF scheduler
can use it. Also, scx_read_event() is added to read an event type in a
compatible way.

Signed-off-by: Changwoo Min <changwoo@igalia.com>
---
tools/sched_ext/include/scx/common.bpf.h | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/tools/sched_ext/include/scx/common.bpf.h b/tools/sched_ext/include/scx/common.bpf.h
index f3e15e9efa76..71db653c8eb2 100644
--- a/tools/sched_ext/include/scx/common.bpf.h
+++ b/tools/sched_ext/include/scx/common.bpf.h
@@ -78,6 +78,10 @@ struct rq *scx_bpf_cpu_rq(s32 cpu) __ksym;
struct cgroup *scx_bpf_task_cgroup(struct task_struct *p) __ksym __weak;
u64 scx_bpf_now(void) __ksym __weak;

+void scx_bpf_event_stats(struct scx_event_stats *events, size_t events__sz) __ksym __weak;
+#define scx_read_event(e, name) \
+ (bpf_core_field_exists((e)->name) ? (e)->name : 0)
+
/*
* Use the following as @it__iter when calling scx_bpf_dsq_move[_vtime]() from
* within bpf_for_each() loops.
--
2.48.1