From 57945256c7d70016ceb1d772068b4e8526a93341 Mon Sep 17 00:00:00 2001
From: Liwei Ji <jiliwei.phys@gmail.com>
Date: Sun, 18 Aug 2024 23:24:10 -0400
Subject: [PATCH] PunctureTracker: make it work in real global mode

---
 PunctureTracker/src/puncture_tracker.cxx | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/PunctureTracker/src/puncture_tracker.cxx b/PunctureTracker/src/puncture_tracker.cxx
index b76f9020..a8ec73b8 100644
--- a/PunctureTracker/src/puncture_tracker.cxx
+++ b/PunctureTracker/src/puncture_tracker.cxx
@@ -17,6 +17,8 @@ namespace PunctureTracker {
 
 static PunctureContainer *g_punctures = nullptr;
 
+static double previous_time = 0.0;
+
 const int max_num_tracked = 10;
 
 extern "C" void PunctureTracker_Init(CCTK_ARGUMENTS) {
@@ -101,6 +103,13 @@ extern "C" void PunctureTracker_Track(CCTK_ARGUMENTS) {
   DECLARE_CCTK_ARGUMENTS_PunctureTracker_Track;
   DECLARE_CCTK_PARAMETERS;
 
+  // we can remove this segment when global mode works
+  if (cctk_time <= previous_time) {
+    return;
+  }
+#pragma omp master
+  { previous_time = cctk_time; }
+
   // Do not track while setting up initial data; time interpolation may fail
   if (cctk_iteration == 0) {
     return;