Be more verbose about aborted moves

1 files changed, 11 insertions, 0 deletions

diff --git a/src/ftsort.c b/src/ftsort.c
index 181845f..42717fe 100644
--- a/src/ftsort.c
+++ b/src/ftsort.c
@@ -140,6 +140,17 @@ static void move_record(struct timestamp* target, struct timestamp* pos)
                         /* Bail out before we cause more disturbance to the
                          * stream. */
                         aborted_moves++;
+                        if (want_verbose)
+                                printf("Sequentiality constraint: "
+                                       "<ev:%s seq:%u pid:%u cpu:%u at %llu> "
+                                       "must come before "
+                                       "<ev:%s seq:%u pid:%u cpu:%u at %llu>\n",
+                                       event2str(prev->event),
+                                       prev->seq_no, prev->pid, prev->cpu,
+                                       (unsigned long long) prev->timestamp,
+                                       event2str(pos->event),
+                                       pos->seq_no, pos->pid, pos->cpu,
+                                       (unsigned long long) pos->timestamp);
                         return;
                 }
         }