Do not let the synchronization work over MPI. Print the limiter parameters on startup

examples/main.c

@@ -560,6 +560,8 @@ int main(int argc, char *argv[]) {
     error("Cannot reconstruct m-poles every step over MPI (yet).");
   if (with_timestep_limiter)
     error("Can't run with time-step limiter over MPI (yet)");
+  if (with_timestep_sync)
+    error("Can't run with time-step synchronization over MPI (yet)");
 #ifdef WITH_LOGGER
   error("Can't run with the particle logger over MPI (yet)");
 #endif

src/engine_marktasks.c

@@ -978,8 +978,6 @@ int engine_marktasks(struct engine *e) {
   const ticks tic = getticks();
   int rebuild_space = 0;
 
-  message("MARKTASKS");
-
   /* Run through the tasks and mark as skip or not. */
   size_t extra_data[3] = {(size_t)e, (size_t)rebuild_space, (size_t)&e->sched};
   threadpool_map(&e->threadpool, engine_marktasks_mapper, s->tasks, s->nr_tasks,

src/hydro_properties.c

@@ -225,6 +225,9 @@ void hydro_props_print(const struct hydro_props *p) {
   if (p->h_max != hydro_props_default_h_max)
     message("Maximal smoothing length allowed: %.4f", p->h_max);
 
+  message("Maximal time-bin difference between neighbours: %d",
+          time_bin_neighbour_max_delta_bin);
+
   if (p->max_smoothing_iterations != hydro_props_default_max_iterations)
     message("Maximal iterations in ghost task set to %d (default is %d)",
             p->max_smoothing_iterations, hydro_props_default_max_iterations);
@@ -293,6 +296,9 @@ void hydro_props_print_snapshot(hid_t h_grpsph, const struct hydro_props *p) {
                        p->hydrogen_mass_fraction);
   io_write_attribute_f(h_grpsph, "Hydrogen ionization transition temperature",
                        p->hydrogen_ionization_temperature);
+  io_write_attribute_i(h_grpsph,
+                       "Maximal time-bin difference between neighbours",
+                       time_bin_neighbour_max_delta_bin);
 
   /* Write out the implementation-dependent viscosity parameters
    * (see hydro/SCHEME/hydro_parameters.h for this implementation) */