Changwoo Min 71d078803c sched_ext: Add trace point to track sched_ext core events ... Add tracing support to track sched_ext core events (/sched_ext/sched_ext_event). This may be useful for debugging sched_ext schedulers that trigger a particular event. The trace point can be used as other trace points, so it can be used in, for example, `perf trace` and BPF programs, as follows: ====== $> sudo perf trace -e sched_ext:sched_ext_event --filter 'name == "SCX_EV_ENQ_SLICE_DFL"' ====== ====== struct tp_sched_ext_event { struct trace_entry ent; u32 __data_loc_name; s64 delta; }; SEC("tracepoint/sched_ext/sched_ext_event") int rtp_add_event(struct tp_sched_ext_event *ctx) { char event_name[128]; unsigned short offset = ctx->__data_loc_name & 0xFFFF; bpf_probe_read_str((void *)event_name, 128, (char *)ctx + offset); bpf_printk("name %s delta %lld", event_name, ctx->delta); return 0; } ====== Signed-off-by: Changwoo Min <changwoo@igalia.com> Acked-by: Andrea Righi <arighi@nvidia.com> Signed-off-by: Tejun Heo <tj@kernel.org>		2025-03-04 08:06:17 -10:00
..
events	sched_ext: Add trace point to track sched_ext core events	2025-03-04 08:06:17 -10:00
misc	NFS: trace: show TIMEDOUT instead of 0x6e	2024-09-01 10:04:55 -04:00
stages	tracing: Add __print_dynamic_array() helper	2024-10-30 17:24:32 +01:00
bpf_probe.h	tracing/bpf: Add might_fault check to syscall probes	2024-10-09 17:09:46 -04:00
define_custom_trace.h
define_trace.h	Add Rust support for trace events:	2024-11-25 15:44:29 -08:00
perf.h	tracing/perf: Add might_fault check to syscall probes	2024-10-09 17:09:46 -04:00
syscall.h
trace_custom_events.h
trace_events.h	tracing/ftrace: Add might_fault check to syscall probes	2024-10-09 17:09:36 -04:00