HP XC System 3.x Software Examining Nodes and Partitions Before Running Jobs, Interrupting a Job

Table 4-1, “Compiler Commands” displays the compiler commands for Standard Linux, Intel, and PGI compilers for the C, C++, and Fortran languages.

Table 4-1 Compiler Commands

Type		Compilers		Notes
	C	C++	Fortran
Standard Linux	gcc	gcc++	g77	All HP XC platforms.
				The HP XC System Software supplies these
				compilers by default.
Intel	icc	icc	ifort	Version 9.0 compilers
				For use on the Intel-based 64–bit platform.
Intel	icc	icc	ifort	Version 8.0 compilers
				For use on the Intel-based 64–bit platform.
Intel	ecc	ecc	efc	Version 7.1 compilers
				For use on the Intel-based 64–bit platform.
				These compilers can be used but Intel may
				not support them much longer.
PGI	pgcc	pgCC	pgf95, pgf77	For use on the CP4000 platform
Pathscale	pathcc	pathCC	pathf95, pathf90	For use on the CP4000 platform
				pathf90 provided for backward
				compatibility.

MPI Compiler

The HP XC System Software includes MPI. The MPI library on the HP XC system is HP MPI Version 2.1.

Examining Nodes and Partitions Before Running Jobs

Before launching an application, you can determine the availability and status of the system's nodes and partitions. Node and partition information is useful to have before launching a job so that you can launch the job to properly match the resources that are available on the system.

When invoked with no options, the SLURM sinfo command returns information about node availability and partitions, along with other information:

$ sinfo
PARTITION AVAIL TIMELIMIT			NODES		STATE	NODELIST
lsf	up	infinite		4	down*	n[12-15]
slurm*	up	infinite		2	idle	n[10-11]

The previous sinfo output shows that there are two partitions on the system:

•one for LSF jobs

•one for SLURM jobs

The asterisk in the PARTITION column indicates the default partition. An asterisk in the STATE column indicates nodes that are currently not responding.

Refer to Chapter 8. Using SLURM for information about using the sinfo command. The SLURM sinfo manpage also provides detailed information about the sinfo command.

Interrupting a Job

A job launched by the srun command can be interrupted by sending a signal to the command by issuing one or more Ctrl/C key sequences. Signals sent to the srun command are automatically forwarded to the tasks that it is controlling.

38 Developing Applications