QLogic OFED+ Host Software User Guide, Rev. B

A–mpirun Options Summary
Tuning Options
-statsfile file-prefix
This option specifies an alternate file to receive the output from the
-print-stats option.
Default: stderr
-statsmode absolute|diffs
When printing process statistics with the -print-stats option, this option
specifies if the printed statistics have the absolute values of the QLogic adapter
chip counters and registers or if there are differences between those values at the
start and end of the process.
Default mode: diffs
Tuning Options
-L, -long-len length
This option determines the length of the message used by the rendezvous
protocol. The InfiniPath rendezvous messaging protocol uses two-way handshake
(with MPI synchronous send semantics) and receive-side DMA.
Default: 64000
-N, -num-send-bufs buffer-count
QLogic MPI uses the specified number as the number of packets that can be sent
without having to wait from an acknowledgement from the receiver. Each packet
contains approximately 2048 bytes of user data.
Default: 512
-s,-long-len-shmem length
This option specifies the length of the message used by the rendezvous protocol
for intra-node communications. The InfiniPath rendezvous messaging protocol
uses two-way handshake (with MPI synchronous send semantics) and
receive-side DMA.
Default: 16000
-W, -rndv-window-size length
When sending a large message using the rendezvous protocol, QLogic MPI splits
the message into a number of fragments at the source and recombines them at
the destination. Each fragment is sent as a single rendezvous stage. This option
specifies the maximum length of each fragment.
Default: 262144 bytes
D000046-005 B A-5