HP XC System 3.x Software manual Setting Debugging Options, Developing Serial Applications

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The Ctrl/C key sequence will report the state of all tasks associated with the srun command. If the Ctrl/C key sequence is entered twice within one second, the associated SIGINT signal will be sent to all tasks. If a third Ctrl/C key sequence is entered, the job will be terminated without waiting for remote tasks to exit.

The Ctrl/Z key sequence is ignored.

Setting Debugging Options

In general, the debugging information for your application that is needed by most debuggers can be produced by supplying the -gswitch to the compiler. For more specific information about debugging options, refer to the documentation and manpages associated with your compiler.

Developing Serial Applications

This section describes how to build and run serial applications in the HP XC environment. The following topics are covered:

•Serial Application Build Environment (page 39) describes the serial application programming model.

•Building Serial Applications (page 39) discusses how to build serial applications.

For further information about developing serial applications, refer to the following sections:

•Debugging Serial Applications (page 53) describes how to debug serial applications.

•Launching Jobs with the srun Command (page 63) describes how to launch applications with the srun command.

•Building and Running a Serial Application (page 99) provides examples of serial applications.

Serial Application Build Environment

You can build and run serial applications in the HP XC programming environment. A serial application is a command or application that does not use any form of parallelism.

An example of a serial application is a standard Linux command, such as the ls or hostname command. A serial application is basically a single-core application that has no communication library calls such as MPI.

Building Serial Applications

This section discusses how to build serial applications on an HP XC system. Compiling, linking, and running serial applications are discussed.

To build a serial application, you must be logged in to an HP XC node with the login role. Serial applications are compiled and linked by invoking compilers and linkers.

You launch a serial application either by submitting it to LSF-HPC with the bsub command, or by invoking the srun command to run it. The process is similar to launching a parallel application, except that only one compute node core is used. To run on an compute node processor, the serial application and any required dynamic libraries must be accessible from that node. A serial application can also be tested locally by running it on the login node.

Compiling and Linking Serial Applications

Serial applications are compiled and linked by invoking compile and link drivers.

You can change compilers by using modules. Refer to "Overview of Modules" for information about using modules.

As an alternative to using dynamic libraries, serial applications can also be linked to static libraries. Often, the -staticoption is used to do this.

Refer to "Building and Running a Serial Application" for examples of building serial applications with the GNU C, GNU Fortran, and Intel C/C++, and Intel Fortran compilers.

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Contents HP XC System Software Users Guide Page Table of Contents Configuring Your Environment with Modulefiles Developing ApplicationsSubmitting Jobs Debugging Applications Tuning ApplicationsUsing Slurm Using LSFAdvanced Topics ExamplesGlossary 109 Index 115 List of Figures Page Determining the Node Platform List of TablesPage Submitting a Job Script List of ExamplesPage This document is organized as follows About This DocumentIntended Audience Document OrganizationHP XC Information $ man lsfcommandname For More InformationSupplementary Information $ man -k keyword Related InformationManpages $ man discover $ man 8 discoverAdditional Publications Related Linux Web SitesRelated MPI Web Sites Related Compiler Web SitesUser input Typographic ConventionsHP Encourages Your Comments Environment VariableOperating System Overview of the User EnvironmentSystem Architecture HP XC System SoftwareStorage and I/O Node SpecializationFile System Layout File SystemSAN Storage Local StorageDetermining System Configuration Information System Interconnect NetworkNetwork Address Translation NAT Commands User EnvironmentModules Serial Applications Application Development EnvironmentRun-Time Environment Parallel ApplicationsLoad Sharing Facility LSF-HPC Standard LSFHow LSF-HPC and Slurm Interact Components, Tools, Compilers, Libraries, and Debuggers Mpirun commandLogging In to the System Using the SystemLVS Login Routing Using the Secure Shell to LogIntroduction Getting Information About QueuesGetting Information About Resources Performing Other Common User Tasks $ man sinfo Getting System Help and InformationOverview of Modules Configuring Your Environment with ModulefilesSupplied Modulefiles Loading a Modulefile Modulefiles Automatically Loaded on the SystemViewing Available Modulefiles Viewing Loaded ModulefilesLoading a Modulefile for the Current Session Automatically Loading a Modulefile at LoginUnloading a Modulefile Modulefile Conflicts$ module help totalview Creating a ModulefileViewing Modulefile-Specific Help $ module load modules $ man modulefilePage Developing Applications Application Development Environment OverviewCompilers Partition Avail Timelimit Nodes State Nodelist Examining Nodes and Partitions Before Running JobsInterrupting a Job MPI CompilerBuilding Serial Applications Setting Debugging OptionsDeveloping Serial Applications Serial Application Build EnvironmentOpenMP Developing Parallel ApplicationsParallel Application Build Environment ModulefilesIntel Fortran and C/C++Compilers PthreadsQuadrics Shmem MPI LibraryBuilding Parallel Applications Developing Libraries Designing Libraries for the CP4000 PlatformExamples of Compiling and Linking HP-MPI Applications Linkcommand 32-bit -L/opt/mypackage/lib/i686 -lmystuff Linkcommand 64-bit -L/opt/mypackage/lib/x8664 -lmystuffTo build a 64-bit application, you might enter Submitting Jobs Overview of Job SubmissionExtSLURMslurm-arguments $ bsub hostname Submitting a Serial Job Using Standard LSFSubmitting a Serial Job Using LSF-HPC Submitting a Serial Job with the LSF bsub CommandSubmitting a Serial Job Through Slurm only Mpirun mpirun--options-srunsrun-optionsmpi-jobname Submitting a Non-MPI Parallel Job$ bsub -n4 -I srun hostname Bsub -nnum-procsbsub-optionsmpijobSubmitting a Batch Job or Job Script $ bsub -n4 -I mpirun -srun ./helloworldBsub -nnum-procs bsub-optionsscript-name $ bsub -n4 -ext SLURMnodes=4 -I ./myscript.sh $ cat myscript.sh #!/bin/shSrun hostname mpirun -srun hellompi $ bsub -I -n4 Myscript.shRunning Preexecution Programs $ bsub -n4 -I ./myscript.sh$ cat ./envscript.sh #!/bin/sh name=`hostname` Opt/hptc/bin/srun Mypreexec TotalView Debugging ApplicationsDebugging Serial Applications Debugging Parallel ApplicationsModule load mpimodule load totalview Setting Up TotalViewUsing TotalView with Slurm SSH and TotalViewUsing TotalView with LSF-HPC Setting TotalView PreferencesDebugging an Application $ mpirun -srun -n2 Psimple Sourcefile initfdte.f was not found, using assembler modeDebugging Running Applications Directories in File ⇒ Search Path$ scancel --user username Exiting TotalView$ squeue Page Tuning Applications Using the Intel Trace Collector and Intel Trace AnalyzerBuilding a Program Intel Trace Collector and HP-MPI Cldflags Running a Program Intel Trace Collector and HP-MPIVisualizing Data Intel Trace Analyzer and HP-MPI LibsUsing the Intel Trace Collector and Intel Trace Analyzer Page Introduction to Slurm Using SlurmLaunching Jobs with the srun Command Srun Squeue Scancel Sinfo ScontrolSrun Roles and Modes Monitoring Jobs with the squeue CommandUsing the srun Command with HP-MPI Using the srun Command with LSF-HPCTerminating Jobs with the scancel Command Getting System Information with the sinfo CommandJob Accounting Fault Tolerance Security# chmod a+r /hptccluster/slurm/job/jobacct.log Using LSF Using Standard LSF on an HP XC SystemUsing LSF-HPC Overview of LSF-HPC Introduction to LSF-HPC in the HP XC EnvironmentHostname Status JL/U MAX Njobs RUN Ssusp Ususp RSV Differences Between LSF-HPC and Standard LSFHostname ResourcesJob Terminology $ ssh n15 lshostsUnknown Unknown SLURMnodelist =nodelist if specified HP XCCompute Node Resource Support$ bsub -n 10 -ext SLURMconstraint=dualcore -I srun hostname $ bsub -n 10 -I srun hostname$ bsub -n 10 -ext SLURMnodes=10 -I srun hostname $ bsub -n 10 -ext SLURMnodes=10exclude=n16 -I srun hostname$ bsub -n4 -ext SLURMnodes=4 -o output.out ./myscript How LSF-HPC and Slurm Launch and Manage a Job#!/bin/sh hostname srun hostname Mpirun -srun ./hellompi Job Startup and Job ControlGetting Information About LSF Execution Host Node Determining the LSF Execution HostDetermining Available LSF-HPC System Resources Getting the Status of LSF-HPCSLINUX6 Getting Host Load InformationExamining LSF-HPC System Queues Getting Information About the lsf PartitionSummary of the LSF bsub Command Format $ sinfo -p lsf$ sinfo -p lsf -lNe Bsub-options srun srun-optionsjobname job-options LSF-SLURM External SchedulerFor information about running scripts Bsub -n num-procs-ext SLURMslurm-arguments \Type=SLINUX64 Submitting a Job from a Non-HP XC HostStarting on lsfhost.localdomain n6 Waiting for dispatch ... Starting on lsfhost.localdomain n1$ bjobs -l Getting Information About JobsGetting Job Allocation Information Slurmid=slurmjobidncpus=slurmnprocsslurmalloc=nodelist$ bjobs Examining the Status of a Job$ bhist -l Time stampJobid User Jobname Pend Psusp RUN Ususp Ssusp Unkwn Total Viewing the Historical Information for a Job$ bhist Summary of time in seconds spent Various StatesTranslating Slurm and LSF-HPC JOBIDs $ srun --jobid=150 hostname Working Interactively Within an LSF-HPC Allocation$ bsub -I -n4 -ext SLURMnodes=4 /bin/bash $ bjobs -l 124 grep slurm$ unset Slurmjobid $ unset Slurmnprocs $ unset SlurmjobidAlternatively, you can use the following $ export SLURMJOBID=150 $ export SLURMNPROCS=4$ bsub -n4 -ext SLURMnodes=4 -o %J.out sleep Job 125 is submitted to the default queue normalLSF-HPC Equivalents of Slurm srun Options $ srun --jobid=250 uptimeBsub -iinputfile Mpi=mpitype Quit-on-interrupt Page Determining IP Address of Your Local Machine Advanced TopicsEnabling Remote Execution with OpenSSH Running an X Terminal Session from a Remote NodeRunning an X terminal Session Using Slurm Running an X terminal Session Using LSF-HPCLogging in to HP XC System $ srun -n2 hostname n46 Using the GNU Parallel Make Capability$ bsub -n4 -Ip srun -n1 xterm -display $ srun -n4 hostname n46$ cd subdir srun -n1 -N1 $MAKE -j4 $ make PREFIX=’srun -n1 -N1 MAKEJ=-j4 Example Procedure$ make PREFIX=srun -n1 -N1 MAKEJ=-j4 Local Disks on Compute NodesPerformance Considerations Modified Makefile is invoked as followsFp = fopen myfile, a+ Communication Between NodesShared File View Private File ViewPage Examine the LSF execution host information Appendix a ExamplesBuilding and Running a Serial Application Launching a Serial Interactive Shell Through LSF-HPCRunning LSF-HPC Jobs with a Slurm Allocation Request SLURMnodes=2 Launching a Parallel Interactive Shell Through LSF-HPCExample 2. Four cores on Two Specific Nodes R15s r1m r15m It tmp swp mem LoadSched LoadStopExamine the the running jobs information $ hostname n16 $ srun hostname n5 $ bjobs124 Lsfad Display the script Submitting a Simple Job Script with LSF-HPCExamine the the finished jobs information Show the environmentShow the job allocation Run some commands from the pseudo-terminalSubmitting an Interactive Job with LSF-HPC Submit the jobView the finished jobs Submitting an HP-MPI Job with LSF-HPCExit the pseudo-terminal View the interactive jobsView the running job View the finished jobLsfhost.localdomai Using a Resource Requirements String in an LSF-HPC Command States by date and time$ bsub -n 8 -R ALPHA5 SLINUX64 \ -ext SLURMnodes=4-4 myjob 108 Glossary Are not appropriate for replication To the queueFirst-come See Fcfs First-served Global storage As local storageLSF master host Single commandLogin requests and directs them to a node with a login role Linux Virtual See LVS Server Load fileSlurm backup Network See NIS Information ServicesRemotely. PXE booting is configured at the Bios level Notably to install and remove software packagesPower available per unit of space SshSymmetric See SMP Multiprocessing 114 Index Index PGI Utilities, 63 Slurm commands
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