snprintf (processid, INSTR_DEFAULT_STR_SIZE, "%p", SIMIX_process_self());
if (xbt_dict_get_or_null (process_category, processid))
xbt_dict_remove (process_category, processid);
snprintf (processid, INSTR_DEFAULT_STR_SIZE, "%p", SIMIX_process_self());
if (xbt_dict_get_or_null (process_category, processid))
xbt_dict_remove (process_category, processid);