print timestamp delta

Signed-off-by: Julien Desfossez <jdesfossez@efficios.com>

diff --git a/src/lttngtop.c b/src/lttngtop.c
index 2521d5f260a33d1d32a8d2cf461756889da60f5d..33f098a977c360b4f9d21efdcd85c33d2efcf59a 100644 (file)
--- a/src/lttngtop.c
+++ b/src/lttngtop.c
@@ -83,6 +83,8 @@ GPtrArray *available_snapshots;
 sem_t metadata_available;
 int reload_trace = 0;
 
+uint64_t prev_ts = 0;
+
 enum {
        OPT_NONE = 0,
        OPT_HELP,
@@ -212,6 +214,7 @@ void print_fields(struct bt_ctf_event *event)
 enum bt_cb_ret print_timestamp(struct bt_ctf_event *call_data, void *private_data)
 {
        unsigned long timestamp;
+       uint64_t delta;
        struct tm start;
        uint64_t ts_nsec_start;
        int pid, cpu_id, tid;
@@ -262,17 +265,26 @@ enum bt_cb_ret print_timestamp(struct bt_ctf_event *call_data, void *private_dat
 
        cpu_id = get_cpu_id(call_data);
        procname = get_context_comm(call_data);
+       if (prev_ts == 0)
+               prev_ts = timestamp;
+       delta = timestamp - prev_ts;
+       prev_ts = timestamp;
 
        if (hostname) {
-               printf("%02d:%02d:%02d.%09" PRIu64 " (%s) (cpu %d) [%s (%d/%d)] %s (",
+               printf("%02d:%02d:%02d.%09" PRIu64 " (+%" PRIu64 ".%09" PRIu64 ") (%s) "
+                               "(cpu %d) [%s (%d/%d)] %s (",
                                start.tm_hour, start.tm_min, start.tm_sec,
-                               ts_nsec_start, hostname, cpu_id, procname, pid,
-                               tid, bt_ctf_event_name(call_data));
+                               ts_nsec_start, delta / NSEC_PER_SEC,
+                               delta % NSEC_PER_SEC, hostname, cpu_id,
+                               procname, pid, tid,
+                               bt_ctf_event_name(call_data));
        } else {
-               printf("%02d:%02d:%02d.%09" PRIu64 " (cpu %d) [%s (%d/%d)] %s (",
+               printf("%02d:%02d:%02d.%09" PRIu64 " (+%" PRIu64 ".%09" PRIu64 ") "
+                               "(cpu %d) [%s (%d/%d)] %s (",
                                start.tm_hour, start.tm_min, start.tm_sec,
-                               ts_nsec_start, cpu_id, procname, pid, tid,
-                               bt_ctf_event_name(call_data));
+                               ts_nsec_start, delta  / NSEC_PER_SEC,
+                               delta % NSEC_PER_SEC, cpu_id, procname, pid,
+                               tid, bt_ctf_event_name(call_data));
        }
        print_fields(call_data);
        printf(")\n");