From: Pierre-Marc Fournier <pierre-marc.fournier@polymtl.ca>
Date: Mon, 15 Feb 2010 05:16:04 +0000 (-0500)
Subject: add debugging messages on buffer switch
X-Git-Tag: v0.2~14
X-Git-Url: https://git.lttng.org/?p=ust.git;a=commitdiff_plain;h=10dd3941021e171ae8ed4f2c3603607426e4af29

add debugging messages on buffer switch
---

diff --git a/libust/buffers.c b/libust/buffers.c
index a36453d..02eaec6 100644
--- a/libust/buffers.c
+++ b/libust/buffers.c
@@ -1521,6 +1521,7 @@ void ltt_force_switch_lockless_slow(struct ust_buffer *buf,
 
 	offsets.size = 0;
 
+	DBG("Switching (forced) %s_%d", chan->channel_name, buf->cpu);
 	/*
 	 * Perform retryable operations.
 	 */
@@ -1738,6 +1739,7 @@ int ltt_reserve_slot_lockless_slow(struct ust_trace *trace,
 	if (unlikely(offsets.end_switch_old)) {
 //ust//		ltt_clear_noref_flag(chan, buf, SUBBUF_INDEX(offsets.old - 1, chan));
 		ltt_reserve_switch_old_subbuf(chan, buf, &offsets, tsc);
+		DBG("Switching %s_%d", chan->channel_name, cpu);
 	}
 
 	/*