IBM Power Systems 775 Manual page 143

Table 2-2 Performance counter numbers for HFIs
hfi0
hfi1
2.4.4 Considerations for using CAU
The CAU is a unit that accelerates the processing of collectives within a system that is made
up of multiple nodes that are interconnected via a cluster network.
Collectives
collective operations are used:
Reduce: Gathers packets from all nodes expect the root node in a tree and reduces the
nodes to a single packet that is delivered to the root node. The root node is any node in
the tree (not necessarily the node at the top of the tree).
agg pkts sent
agg pkts dropped sending
agg pkts received
agg pkts dropped receiving
agg imm send pkt count
agg send recv pkt count
agg fullRDMA sent count
agg halfRDMA sent count
agg smallRDMA sent count
agg ip pkt sent count
agg cau pkt sent count
agg gups pkt sent count
agg pkts sent
agg pkts dropped sending
agg pkts received
agg pkts dropped receiving
agg imm send pkt count
agg send recv pkt count
agg fullRDMA sent count
agg halfRDMA sent count
agg smallRDMA sent count
agg ip pkt sent count
agg cau pkt sent count
agg gups pkt sent count
are distributed operations that operate across a tree. The following primary
MP_INSTANCES
1 2 4
1627201 865133 868662
0 0 0
1627181 865097 868630
0 0 0
24607 12304 12304
98409 98398 98394
1491820 747036 748159
0 0 0
0 0 0
202 191 197
0 0 0
0 0 0
31 766560 770090
0 0 0
34 766578 770110
0 0 0
0 12303 12303
0 0 0
0 747025 748148
0 0 0
0 0 0
31 30 33
0 0 0
0 0 0
Chapter 2. Application integration
8 16
877346 877322
0 0
877309 877294
0 0
12304 12304
98395 98391
751852 751847
0 0
0 0
218 202
0 0
0 0
778757 778746
0 0
778776 778765
0 0
12304 12303
0 0
751836 751836
0 0
0 0
41 31
0 0
0 0
129