void TRACE_surf_action(surf_action_t surf_action, const char *category);
//for tracing gtnets
-void TRACE_surf_gtnets_communicate(void *action, int src, int dst);
-int TRACE_surf_gtnets_get_src(void *action);
-int TRACE_surf_gtnets_get_dst(void *action);
+void TRACE_surf_gtnets_communicate(void *action, const char *src, const char *dst);
void TRACE_surf_gtnets_destroy(void *action);
/* from smpi_instr.c */