When you run the test MPI Ping Pong: latency getting the following warning:
MPI Ping-Pong: Latency
Test Result: Success
Failed nodes list (0)
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No nodes failed this test.
Other information
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Information
A "Warning" assessment indicates that at least one node is performing poorly relative to the other nodes in the cluster.
A poorly performing node meets both of the following criteria:
1. Average latency/throughput over all network links for the node is at least one standard deviation away from the mean value for the cluster.
2. Latency is at least 20% higher or throughput is at least 20% lower than the cluster mean. This avoids unwarranted Warnings on highly uniform cluster networks.
Information
Average = 3,216 usecs
Information
Std Dev = 0,000 usecs
Information
Best Link = 3,216 usecs (CLUSTER-NODE4 <-> CLUSTER-NODE7)
Information
Worst Link = 3,216 usecs (CLUSTER-NODE4 <-> CLUSTER-NODE7)
Information
Variability = Low
Information
Packet size for determining latency: 4 Bytes