childs++;
if (childs == MAXTREEFANOUT) {
XBT_DEBUG("coll:tuned:topo:build_bmtree max fanout incorrect %d needed %d", MAXTREEFANOUT, childs);
childs++;
if (childs == MAXTREEFANOUT) {
XBT_DEBUG("coll:tuned:topo:build_bmtree max fanout incorrect %d needed %d", MAXTREEFANOUT, childs);