char *link_backbone = bprintf("%s_backbone", cluster->id);
XBT_DEBUG("<link\tid=\"%s\" bw=\"%f\" lat=\"%f\"/>", link_backbone,
cluster->bb_bw, cluster->bb_lat);
char *link_backbone = bprintf("%s_backbone", cluster->id);
XBT_DEBUG("<link\tid=\"%s\" bw=\"%f\" lat=\"%f\"/>", link_backbone,
cluster->bb_bw, cluster->bb_lat);