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diff --git a/examples/performance-thread/common/lthread_diag.h b/examples/performance-thread/common/lthread_diag.h
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+++ b/examples/performance-thread/common/lthread_diag.h
@@ -0,0 +1,132 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2015  Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef LTHREAD_DIAG_H_
+#define LTHREAD_DIAG_H_
+
+#include <stdint.h>
+#include <inttypes.h>
+
+#include <rte_log.h>
+#include <rte_common.h>
+
+#include "lthread_api.h"
+#include "lthread_diag_api.h"
+
+extern diag_callback diag_cb;
+
+extern const char *diag_event_text[];
+extern uint64_t diag_mask;
+
+/* max size of name strings */
+#define LT_MAX_NAME_SIZE 64
+
+#if LTHREAD_DIAG
+#define DISPLAY_OBJCACHE_QUEUES 1
+
+/*
+ * Generate a diagnostic trace or event in the case where an object is created.
+ *
+ * The value returned by the callback is stored in the object.
+ *
+ * @ param obj
+ *  pointer to the object that was created
+ * @ param ev
+ *  the event code
+ *
+ */
+#define DIAG_CREATE_EVENT(obj, ev) do {					\
+	struct lthread *ct = RTE_PER_LCORE(this_sched)->current_lthread;\
+	if ((BIT(ev) & diag_mask) && (ev < LT_DIAG_EVENT_MAX)) {	\
+		(obj)->diag_ref = (diag_cb)(rte_rdtsc(),		\
+					ct,				\
+					(ev),				\
+					0,				\
+					diag_event_text[(ev)],		\
+					(uint64_t)obj,			\
+					0);				\
+	}								\
+} while (0)
+
+/*
+ * Generate a diagnostic trace event.
+ *
+ * @ param obj
+ *  pointer to the lthread, cond or mutex object
+ * @ param ev
+ *  the event code
+ * @ param p1
+ *  object specific value ( see lthread_diag_api.h )
+ * @ param p2
+ *  object specific value ( see lthread_diag_api.h )
+ */
+#define DIAG_EVENT(obj, ev, p1, p2) do {				\
+	struct lthread *ct = RTE_PER_LCORE(this_sched)->current_lthread;\
+	if ((BIT(ev) & diag_mask) && (ev < LT_DIAG_EVENT_MAX)) {	\
+		(diag_cb)(rte_rdtsc(),					\
+				ct,					\
+				ev,					\
+				(obj)->diag_ref,			\
+				diag_event_text[(ev)],			\
+				(uint64_t)(p1),				\
+				(uint64_t)(p2));			\
+	}								\
+} while (0)
+
+#define DIAG_COUNT_DEFINE(x) rte_atomic64_t count_##x
+#define DIAG_COUNT_INIT(o, x) rte_atomic64_init(&((o)->count_##x))
+#define DIAG_COUNT_INC(o, x) rte_atomic64_inc(&((o)->count_##x))
+#define DIAG_COUNT_DEC(o, x) rte_atomic64_dec(&((o)->count_##x))
+#define DIAG_COUNT(o, x) rte_atomic64_read(&((o)->count_##x))
+
+#define DIAG_USED
+
+#else
+
+/* no diagnostics configured */
+
+#define DISPLAY_OBJCACHE_QUEUES 0
+
+#define DIAG_CREATE_EVENT(obj, ev)
+#define DIAG_EVENT(obj, ev, p1, p)
+
+#define DIAG_COUNT_DEFINE(x)
+#define DIAG_COUNT_INIT(o, x) do {} while (0)
+#define DIAG_COUNT_INC(o, x) do {} while (0)
+#define DIAG_COUNT_DEC(o, x) do {} while (0)
+#define DIAG_COUNT(o, x) 0
+
+#define DIAG_USED __rte_unused
+
+#endif				/* LTHREAD_DIAG */
+#endif				/* LTHREAD_DIAG_H_ */