sprintf(name, "%s->%s", name_tail, name_head);
double size = dot_parse_double(agget(edge, (char *) "size"));
XBT_DEBUG("size : %e, get size : %s", size, agget(edge, (char *) "size"));
sprintf(name, "%s->%s", name_tail, name_head);
double size = dot_parse_double(agget(edge, (char *) "size"));
XBT_DEBUG("size : %e, get size : %s", size, agget(edge, (char *) "size"));