Returns an array of AMP information, where each array element is the unique number of an AMP.
The number of elements in the array can be determined by NodeInfo.getNumAMPs().
AMP numbers occur in ascending order for each node. For example, if the first node has four AMP vprocs, the first four array elements provide the AMP numbers, in ascending order, for the first node. Similarly, the first four array elements from NodeInfo.getNodeIds() provide the node number of the first node.