[dpdk-dev] [PATCH v2 06/32] eal/trace: get bootup timestamp for trace

[<jerinj@marvell.com>]

From: Jerin Jacob <jerinj@marvell.com>

Find epoch_sec, epoch_nsec and uptime_ticks time information
on eal_trace_init()/bootup to derive the time in the trace.

Signed-off-by: Jerin Jacob <jerinj@marvell.com>
---
 lib/librte_eal/common/eal_common_trace.c      |  3 +++
 .../common/eal_common_trace_utils.c           | 22 +++++++++++++++++++
 lib/librte_eal/common/eal_trace.h             |  5 +++++
 3 files changed, 30 insertions(+)

diff --git a/lib/librte_eal/common/eal_common_trace.c b/lib/librte_eal/common/eal_common_trace.c
index 50890fb5b..42829ed6f 100644
--- a/lib/librte_eal/common/eal_common_trace.c
+++ b/lib/librte_eal/common/eal_common_trace.c
@@ -59,6 +59,9 @@ eal_trace_init(void)
 	if (trace_mkdir())
 		goto fail;
 
+	/* Save current epoch timestamp for future use */
+	if (trace_epoch_time_save() < 0)
+		goto fail;
 
 	rte_trace_global_mode_set(trace.mode);
 
diff --git a/lib/librte_eal/common/eal_common_trace_utils.c b/lib/librte_eal/common/eal_common_trace_utils.c
index 8df7b5c33..f65672119 100644
--- a/lib/librte_eal/common/eal_common_trace_utils.c
+++ b/lib/librte_eal/common/eal_common_trace_utils.c
@@ -98,6 +98,28 @@ trace_session_name_generate(char *trace_dir)
 	return -rte_errno;
 }
 
+int
+trace_epoch_time_save(void)
+{
+	struct trace *trace = trace_obj_get();
+	struct timespec epoch = { 0, 0 };
+	uint64_t avg, start, end;
+
+	start = rte_get_tsc_cycles();
+	if (clock_gettime(CLOCK_REALTIME, &epoch) < 0) {
+		trace_err("failed to get the epoch time");
+		return -1;
+	}
+	end = rte_get_tsc_cycles();
+	avg = (start + end) >> 1;
+
+	trace->epoch_sec = (uint64_t) epoch.tv_sec;
+	trace->epoch_nsec = (uint64_t) epoch.tv_nsec;
+	trace->uptime_ticks = avg;
+
+	return 0;
+}
+
 static int
 trace_dir_default_path_get(char *dir_path)
 {
diff --git a/lib/librte_eal/common/eal_trace.h b/lib/librte_eal/common/eal_trace.h
index 9354f2456..10139c06c 100644
--- a/lib/librte_eal/common/eal_trace.h
+++ b/lib/librte_eal/common/eal_trace.h
@@ -5,6 +5,7 @@
 #ifndef __EAL_TRACE_H
 #define __EAL_TRACE_H
 
+#include <rte_cycles.h>
 #include <rte_spinlock.h>
 #include <rte_trace.h>
 #include <rte_uuid.h>
@@ -38,6 +39,9 @@ struct trace {
 	rte_uuid_t uuid;
 	uint32_t level;
 	uint32_t nb_trace_points;
+	uint64_t epoch_sec;
+	uint64_t epoch_nsec;
+	uint64_t uptime_ticks;
 	rte_spinlock_t lock;
 };
 
@@ -60,6 +64,7 @@ struct trace_point_head *trace_list_head_get(void);
 bool trace_has_duplicate_entry(void);
 void trace_uuid_generate(void);
 int trace_mkdir(void);
+int trace_epoch_time_save(void);
 
 /* EAL interface */
 int eal_trace_init(void);
-- 
2.25.1