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authorBjörn-Egil Dahlberg <[email protected]>2015-08-19 17:43:33 +0200
committerBjörn-Egil Dahlberg <[email protected]>2016-04-06 17:23:56 +0200
commit8735e04e031284bd73d0cf5b9fddebf624623c02 (patch)
tree35842139482e1ffa5c9e42575a16473c2d4fdff7
parentd31e4e33ac73c0c3239a3bf8a2919165bbed9e88 (diff)
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erts: Add lttng tracepoints for async pool queue
* aio_pool_get * aio_pool_add
-rw-r--r--erts/emulator/beam/erl_async.c16
-rw-r--r--erts/emulator/beam/erl_thr_queue.c32
-rw-r--r--erts/emulator/beam/erl_thr_queue.h4
-rw-r--r--erts/emulator/beam/erlang_lttng.h28
4 files changed, 80 insertions, 0 deletions
diff --git a/erts/emulator/beam/erl_async.c b/erts/emulator/beam/erl_async.c
index cdeeb5281b..69240f7886 100644
--- a/erts/emulator/beam/erl_async.c
+++ b/erts/emulator/beam/erl_async.c
@@ -28,6 +28,7 @@
#include "erl_thr_queue.h"
#include "erl_async.h"
#include "dtrace-wrapper.h"
+#include "lttng-wrapper.h"
#define ERTS_MAX_ASYNC_READY_CALLS_IN_SEQ 20
@@ -281,6 +282,13 @@ static ERTS_INLINE void async_add(ErtsAsync *a, ErtsAsyncQ* q)
#endif
erts_thr_q_enqueue(&q->thr_q, a);
+#ifdef USE_LTTNG_VM_TRACEPOINTS
+ if (LTTNG_ENABLED(aio_pool_add)) {
+ lttng_decl_portbuf(port_str);
+ lttng_portid_to_str(a->port, port_str);
+ LTTNG2(aio_pool_add, port_str, -1);
+ }
+#endif
#ifdef USE_VM_PROBES
if (DTRACE_ENABLED(aio_pool_add)) {
DTRACE_CHARBUF(port_str, 16);
@@ -317,6 +325,14 @@ static ERTS_INLINE ErtsAsync *async_get(ErtsThrQ_t *q,
if (saved_fin_deq)
erts_thr_q_append_finalize_dequeue_data(&a->q.fin_deq, &fin_deq);
#endif
+#ifdef USE_LTTNG_VM_TRACEPOINTS
+ if (LTTNG_ENABLED(aio_pool_get)) {
+ lttng_decl_portbuf(port_str);
+ int length = erts_thr_q_length_dirty(q);
+ lttng_portid_to_str(a->port, port_str);
+ LTTNG2(aio_pool_get, port_str, length);
+ }
+#endif
#ifdef USE_VM_PROBES
if (DTRACE_ENABLED(aio_pool_get)) {
DTRACE_CHARBUF(port_str, 16);
diff --git a/erts/emulator/beam/erl_thr_queue.c b/erts/emulator/beam/erl_thr_queue.c
index 7ff456b915..30c9d70c59 100644
--- a/erts/emulator/beam/erl_thr_queue.c
+++ b/erts/emulator/beam/erl_thr_queue.c
@@ -780,3 +780,35 @@ erts_thr_q_dequeue(ErtsThrQ_t *q)
return res;
#endif
}
+
+#ifdef USE_LTTNG_VM_TRACEPOINTS
+int
+erts_thr_q_length_dirty(ErtsThrQ_t *q)
+{
+ int n = 0;
+#ifndef USE_THREADS
+ void *res;
+ ErtsThrQElement_t *tmp;
+
+ for (tmp = q->first; tmp != NULL; tmp = tmp->next) {
+ n++;
+ }
+#else
+ ErtsThrQElement_t *e;
+ erts_aint_t inext;
+
+ e = ErtsThrQDirtyReadEl(&q->head.head);
+ inext = erts_atomic_read_acqb(&e->next);
+
+ while (inext != ERTS_AINT_NULL) {
+ e = (ErtsThrQElement_t *) inext;
+ if (e != &q->tail.data.marker) {
+ /* don't count marker */
+ n++;
+ }
+ inext = erts_atomic_read_acqb(&e->next);
+ }
+#endif
+ return n;
+}
+#endif
diff --git a/erts/emulator/beam/erl_thr_queue.h b/erts/emulator/beam/erl_thr_queue.h
index 27a6d03224..f5e5522948 100644
--- a/erts/emulator/beam/erl_thr_queue.h
+++ b/erts/emulator/beam/erl_thr_queue.h
@@ -190,6 +190,10 @@ void erts_thr_q_append_finalize_dequeue_data(ErtsThrQFinDeQ_t *,
int erts_thr_q_finalize_dequeue(ErtsThrQFinDeQ_t *);
void erts_thr_q_finalize_dequeue_state_init(ErtsThrQFinDeQ_t *);
+#ifdef USE_LTTNG_VM_TRACEPOINTS
+int erts_thr_q_length_dirty(ErtsThrQ_t *);
+#endif
+
#ifdef ERTS_SMP
ERTS_GLB_INLINE ErtsThrPrgrVal erts_thr_q_need_thr_progress(ErtsThrQ_t *q);
#endif
diff --git a/erts/emulator/beam/erlang_lttng.h b/erts/emulator/beam/erlang_lttng.h
index b5cd90d93e..a202ce68c9 100644
--- a/erts/emulator/beam/erlang_lttng.h
+++ b/erts/emulator/beam/erlang_lttng.h
@@ -307,6 +307,34 @@ TRACEPOINT_EVENT(
)
)
+/* Async pool */
+
+TRACEPOINT_EVENT(
+ com_ericsson_otp,
+ aio_pool_get,
+ TP_ARGS(
+ char*, port,
+ int, length
+ ),
+ TP_FIELDS(
+ ctf_string(port, port)
+ ctf_integer(int, length, length)
+ )
+)
+
+TRACEPOINT_EVENT(
+ com_ericsson_otp,
+ aio_pool_add,
+ TP_ARGS(
+ char*, port,
+ int, length
+ ),
+ TP_FIELDS(
+ ctf_string(port, port)
+ ctf_integer(int, length, length)
+ )
+)
+
/* Memory Allocator */