Qlogic QME7342 Guia do Utilizador descarregar pdf (Página 136)

6–SHMEM Description and Configuration

SHMEM Benchmark Programs

6-28 IB0054606-02 A

Additional SHMEM micro-benchmark programs are included to measure get and

put performance with randomized PE selection and randomized target memory

locations, all-to-all communication patterns using put, barrier and reduce:

QLogic SHMEM random access benchmark

shmem-rand: randomized put/get benchmark

This is actually a hybrid SHMEM/MPI code, so a binary is provided per

supported MPI implementation. It has the following command line options:

Usage: shmem-rand [options] [list of message sizes].

Message sizes are specified in bytes (default = 8)

Options: See Table 6-5

-b INT batch size, number of concurrent operations (default = 64)

-f force order for bifurcation of PEs based on rank order

-h displays the help page

-l INT set minimum message size (default = 2)

-m INT sets the maximum message size (default = 4194304)

Table 6-5. QLogic SHMEM random access benchmark options

Option Description

-a use automatic (NULL) handles for NB ops (default explicit han-

dles)

-b use a barrier every window

-c INTEGER specify loop count (see also -t)

-f fixed window size (default is scaled)

-h displays the help page

-l enable communication to local ranks

-m INTEGER[K] memory size in MB (default = 8MB): or in KB with a K suffix

-n use non-pipelined mode for NB ops (default pipelined)

Table 6-4. QLogic SHMEM micro-benchmarks options

Option Description

1 2 ... 131 132 133 134 135 136 137 138 139 140 141 ... 283 284

Sem comentários

Qlogic QME7342 Guia do Utilizador Página 136