Print the host name at runtime and also in timesteps.txt.

examples/main.c

@@ -265,6 +265,7 @@ int main(int argc, char *argv[]) {
   /* Report CPU frequency. */
   cpufreq = clocks_get_cpufreq();
   if (myrank == 0) {
+    message("Running on: %s",hostname());
     message("CPU frequency used for tick conversion: %llu Hz", cpufreq);
   }
 

src/engine.c

@@ -2228,8 +2228,8 @@ void engine_print_task_counts(struct engine *e) {
   printf("[%04i] %s engine_print_task_counts: task counts are [ %s=%i",
          e->nodeID, clocks_get_timesincestart(), taskID_names[0], counts[0]);
 #else
-  printf("%s engine_print_task_counts: task counts are [ %s=%i",
-         clocks_get_timesincestart(), taskID_names[0], counts[0]);
+  printf("%s engine_print_task_counts: time step:%d task counts are [ %s=%i",
+         clocks_get_timesincestart(), e->ti_current, taskID_names[0], counts[0]);
 #endif
   for (int k = 1; k < task_type_count; k++)
     printf(" %s=%i", taskID_names[k], counts[k]);
@@ -3409,11 +3409,11 @@ void engine_init(struct engine *e, struct space *s,
             nr_nodes * nr_threads);
     e->file_timesteps = fopen(timestepsfileName, "w");
     fprintf(e->file_timesteps,
-            "# Branch: %s\n# Revision: %s\n# Compiler: %s, Version: %s \n# "
+            "# Host: %s\n# Branch: %s\n# Revision: %s\n# Compiler: %s, Version: %s \n# "
             "Number of threads: %d\n# Number of MPI ranks: %d\n# Hydrodynamic "
             "scheme: %s\n# Hydrodynamic kernel: %s\n# No. of neighbours: %.2f "
             "+/- %.2f\n# Eta: %f\n",
-            git_branch(), git_revision(), compiler_name(), compiler_version(),
+            hostname(), git_branch(), git_revision(), compiler_name(), compiler_version(),
             e->nr_threads, e->nr_nodes, SPH_IMPLEMENTATION, kernel_name,
             e->hydro_properties->target_neighbours,
             e->hydro_properties->delta_neighbours,