diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c
index 289f52af15b9..062eacd65668 100644
--- a/sound/core/pcm_lib.c
+++ b/sound/core/pcm_lib.c
@@ -28,6 +28,7 @@
 #define trace_xrun(substream)
 #define trace_hw_ptr_error(substream, reason)
 #define trace_applptr(substream, prev, curr)
+#define trace_applptr_start(substream, frame)
 #endif
 
 static int fill_silence_frames(struct snd_pcm_substream *substream,
@@ -2131,6 +2132,8 @@ snd_pcm_sframes_t __snd_pcm_lib_xfer(struct snd_pcm_substream *substream,
 	if (err < 0)
 		return err;
 
+	trace_applptr_start(substream, size);
+
 	is_playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
 	if (interleaved) {
 		if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED &&
diff --git a/sound/core/pcm_trace.h b/sound/core/pcm_trace.h
index f18da2050772..535fbaa60c71 100644
--- a/sound/core/pcm_trace.h
+++ b/sound/core/pcm_trace.h
@@ -141,6 +141,32 @@ TRACE_EVENT(applptr,
 	)
 );
 
+TRACE_EVENT(applptr_start,
+	TP_PROTO(struct snd_pcm_substream *substream, snd_pcm_uframes_t size),
+	TP_ARGS(substream, size),
+	TP_STRUCT__entry(
+		__field( unsigned int, card )
+		__field( unsigned int, device )
+		__field( unsigned int, number )
+		__field( unsigned int, stream )
+		__field( snd_pcm_uframes_t, size )
+	),
+	TP_fast_assign(
+		__entry->card = (substream)->pcm->card->number;
+		__entry->device = (substream)->pcm->device;
+		__entry->number = (substream)->number;
+		__entry->stream = (substream)->stream;
+		__entry->size = (size);
+	),
+	TP_printk("pcmC%dD%d%s/sub%d: size=%lu",
+		__entry->card,
+		__entry->device,
+		__entry->stream ? "c" : "p",
+		__entry->number,
+		__entry->size
+	)
+);
+
 #endif /* _PCM_TRACE_H */
 
 /* This part must be outside protection */