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likwid-mpirun - Online in the Cloud

Run likwid-mpirun in OnWorks free hosting provider over Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

This is the command likwid-mpirun that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

PROGRAM:

NAME


likwid-mpirun - A tool to start and monitor MPI applications with LIKWID

SYNOPSIS


likwid-memsweeper [-hd] [-hostfile filename] [-nperdomain number_of_processes_in_domain]
[-pin expression] [-omp expression] [-mpi expression] [--]

DESCRIPTION


likwid-mpirun is a command line application that wraps the vendor-specific mpirun tool and
adds calls to likwid-perfctr(1) to the execution string. The user-given application is
ran, measured and the results returned to the staring node.

OPTIONS


-h prints a help message to standard output, then exits.

-d prints debug messages to standard output.

-hostfile filename
specifies the nodes to schedule the MPI processes on

-nperdomain number_of_processes_in_domain
specifies the processes per affinity domain (see likwid-pin for info about affinity
domains)

-pin expression
specifies the pinning for hybrid execution (see likwid-pin for info about affinity
domains)

-omp expression
enables hybrid setup. Can only be used in combination with -pin. The only possible
value is: intel

-mpi expression
specifies the MPI implementation that should be used by the wrapper. Possible
values are intelmpi, openmpi and mvapich2

-- stops parsing arguments for likwid-mpirun, in order to set options for underlying
MPI implementation after --.

EXAMPLE


1. For standard application:

likwid-mpirun -np 32 ./myApp

Will run 32 MPI processes, each host is filled with as much processes as written in ppn

2. With pinning:

likwid-mpirun -np 32 -nperdomain S:2 ./myApp

Will start 32 MPI processes with 2 processes per socket.

3. For hybrid runs:

likwid-mpirun -np 32 -pin M0:0-3_M1:0-3 ./myApp

Will start 32 MPI processes with 2 processes per node. Threads of the first process are
pinned to the cores 0-3 in NUMA domain 0 (M0). The OpenMP threads of the second process
are pinned to the first four cores in NUMA domain 1 (M1)

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