2 files changed, 21 insertions, 1 deletions
diff --git a/erts/emulator/beam/erl_process.c b/erts/emulator/beam/erl_process.c
index a706ebf595..46b45b1d3e 100644
--- a/erts/emulator/beam/erl_process.c
+++ b/erts/emulator/beam/erl_process.c
@@ -43,6 +43,7 @@
 #include "erl_thr_queue.h"
 #include "erl_async.h"
 #include "dtrace-wrapper.h"
+#include "lttng-wrapper.h"
 #include "erl_ptab.h"
 #include "erl_bif_unique.h"
 #define ERTS_WANT_TIMER_WHEEL_API
@@ -3238,6 +3239,7 @@ scheduler_wait(int *fcalls, ErtsSchedulerData *esdp, ErtsRunQueue *rq)
 	    ERTS_MSACC_SET_STATE_CACHED_M(ERTS_MSACC_STATE_CHECK_IO);
 
 	    ASSERT(!erts_port_task_have_outstanding_io_tasks());
+            LTTNG2(scheduler_poll, esdp->no, 1);
 	    erl_sys_schedule(1); /* Might give us something to do */
 
 	    ERTS_MSACC_POP_STATE_M();
@@ -3361,6 +3363,7 @@ scheduler_wait(int *fcalls, ErtsSchedulerData *esdp, ErtsRunQueue *rq)
 	ASSERT(!erts_port_task_have_outstanding_io_tasks());
 
 	ERTS_MSACC_SET_STATE_CACHED_M(ERTS_MSACC_STATE_CHECK_IO);
+        LTTNG2(scheduler_poll, esdp->no, 0);
 
 	erl_sys_schedule(0);
 
@@ -9581,7 +9584,10 @@ Process *schedule(Process *p, int calls)
 	    erts_sys_schedule_interrupt(0);
 #endif
 	    erts_smp_runq_unlock(rq);
-	    ERTS_MSACC_SET_STATE_CACHED_M(ERTS_MSACC_STATE_CHECK_IO);
+
+            ERTS_MSACC_SET_STATE_CACHED_M(ERTS_MSACC_STATE_CHECK_IO);
+            LTTNG2(scheduler_poll, esdp->no, 1);
+
 	    erl_sys_schedule(1);
 	    ERTS_MSACC_POP_STATE_M();
 
diff --git a/erts/emulator/beam/erlang_lttng.h b/erts/emulator/beam/erlang_lttng.h
index 2fab6fb698..5b5dc5548e 100644
--- a/erts/emulator/beam/erlang_lttng.h
+++ b/erts/emulator/beam/erlang_lttng.h
@@ -30,6 +30,20 @@
 
 #include <lttng/tracepoint.h>
 
+/* Schedulers */
+
+TRACEPOINT_EVENT(
+    com_ericsson_otp,
+    scheduler_poll,
+    TP_ARGS(
+        int, id,
+        int, runnable
+    ),
+    TP_FIELDS(
+        ctf_integer(int, scheduler, id)
+        ctf_integer(int, runnable, runnable)
+    )
+)
 
 #ifndef LTTNG_CARRIER_STATS
 #define LTTNG_CARRIER_STATS