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8.9 Environment Variables
HP-MPI on HP XC provides the followin g additional environment variables:
8.9.1 MPIRUN_OPTIONS
MPIRUN_OPTIONS is a mechanism for specifying additional command line
arguments to
mpirun. If this environment variable is set, then any mpirun comm and wi
ll behave as if the
arguments in MPIRUN_OPTIONS had been specified on the mpirun comman
dline.For
example:
% export MPIRUN_OPTIONS="-v -prot"
% $MPI_ROOT/bin/mpirun -np 2 /path/to/program.x
The above commands are equivalent to the follo wing:
% $MPI_ROO
T/bin/mpirun -v -prot -np 2 /path/to/program.x
8.9.2 MPIRUN_SYSTEM_OPTIONS
The MPIRUN_SYSTEM_OPTIONS environment variable allows a system administrator
to preset options which will be inserted b efore MPIRUN_OPTIONS and any explicit
mpirun options on the command line. This is most useful for establishing a preferred IP
address/hostname for TCP communications in the situation where a user explicitly requests
TCP via the -TCP option, or when default system interconnection selection chooses TCP.
This environment variable can be overridden.
8.9.3 MPI_IC_ORDER
The MPI_IC _ORDER environment variable, whose default contents are
"elan:gm:itapi:TCP", instructs HP-M PI to search in a specific order for the presence of a
system interconnect. Lowercase selections imply use if detected, otherwise keep searching.
An uppercase option demands that the system interconnect option be used, and if it cannot be
selected the application will terminate wi th an err or. For example:
% export MPI_IC_ORDER="elan:TCP:gm:itapi"
% export MPIRUN_SYSTEM_OPTIONS="-subnet 192.168.1.1"
% export MPIRUN_OPTIONS="-prot"
% $MPI_ROOT/bin/mpirun -srun -n4 ./a.out
The command line for the above will appear to mpirun as:
$ MPI_ROOT/bin/mpirun -subnet 192.168.1.1 -prot -srun -n4
./a.out
The system interconnect decision will look for the presence of Elan and use it if found.
Otherwise, TCP will be used and the communication path will be on the subnet
192.168.1.1.
The following is an exam ple of using TCP over Gigab it Ethernet, assum in g Gigabit Ethernet
is installed and 192.168.1.1 corresponds to the E th ern et interface with Gigabit Ethernet.
Note the implicit use of -subnet 192.168.1.1 is required to effectively get TCP over the
proper subnet.
% export MPI_IC_ORDER="elan:TCP:gm:itapi"
% export MPIRUN_SYSTEM_OPTIONS="-subnet 192.168.1.1"
% $MPI_ROOT/bin/mpirun -prot -TCP -srun -n4 ./a.out
8.9.4 MPI_PHYSICAL_MEMORY
MPI_PHYSICAL_MEMORY allows you to specify th e amount of physical memory in kiloby tes
available on the system . MPI normally attempts to determine the amount of physical memory
8-10 Using HP-MPI
- HP XC System Software 1
- Contents 3
- 3 Developing Applications 4
- 4 Debugging Applications 5
- 5 Tuning Applications 5
- 6UsingSLURM 5
- 8UsingHP-MPI 6
- 7 Using LSF 6
- 9UsingHPMLIB 7
- 10 Advanced Topics 8
- AExamples 8
- About This Document 11
- HP XC Inform ation 12
- For M ore Information 13
- Supplementary Information 13
- Manpages 14
- Related Information 15
- Typographical Conventions 16
- HP Encourages Your Comments 17
- 1.1 System Architecture 19
- 1.1.3 Storage and I/O 20
- 1.1.4 File System 20
- 1.2 User Environment 22
- 1.3.1 Parallel Applications 23
- 1.3.2 Serial Applications 23
- 1.4 Run-Time E nvironment 24
- 1.4.4 HP-MPI 25
- Using the System 27
- 2.2.1 Notes on Modulefiles 28
- 2.2.2 Supplied Modulefiles 29
- 2.2.6 Loading a Modulefile 30
- 2.2.7 Unloading a M odulefile 31
- 2.2.8 Modulefile Conflicts 31
- 2.2.9 Creating a Mod u lefile 32
- 2.3.1 Introduction 33
- 2.3.5 Launching Jobs 34
- $ man sinfo 39
- $ man -k keyword 39
- Using the System 2-13 39
- Developing Applications 41
- 3.2 Using Compilers 42
- 3.4 Interrupting a Job 43
- 3-4 Developing Applications 44
- Developing Applications 3-5 45
- 3-6 Developing Applications 46
- Developing Applications 3-7 47
- $ module load mpi 48
- $ mpicc -o mycode hello.c 48
- $ mpif90 -o mycode hello.f 48
- 3-8 Developing Applications 48
- 3.8 Developing Libraries 49
- 3.9 Advanced To pics 50
- 3-14 Deve loping Applications 54
- Developing Applications 3-15 55
- Debugging Applications 57
- 4-2 D ebugging Applications 58
- $ totalview 60
- 4-4 D ebugging Applications 60
- Debugging Applications 4-5 61
- 4-6 D ebugging Applications 62
- -verbosity %V %F" 63
- Debugging Applications 4-7 63
- 4-8 D ebugging Applications 64
- Etnus TotalView Version# 65
- Debugging Applications 4-9 65
- $ mpirun -srun -n2 Psimple 66
- 4-10 Debugging Applications 66
- $ squeue 67
- $ scancel --user username 67
- Debugging Applications 4-11 67
- Tuning Applications 69
- Using SLURM 71
- $ srun -N 16 -b myscript.sh 73
- $ srun -A -N 4 myscript.sh 73
- $ srun -a 6543 -j 73
- Using SLURM 6-3 73
- 6.4.2 srun Signal Handling 74
- 6.4.3 srun Run-Mode Options 74
- Using SLURM 6-5 75
- 6-6 Using SLURM 76
- 6.4.5 srun Control Options 77
- 6.4.6 srun I/O Options 78
- Using SLURM 6-9 79
- 6.4.7 srun Constraint Options 80
- Using SLURM 6-11 81
- 6.4.9 Using srun with HP-MPI 82
- 6.4.10 Using srun with LSF 82
- 6.8 Job Accounting 84
- 6.9 Fault Tolerance 84
- 6.10 Security 84
- Using LSF 85
- 7.1.2 Topology Support 86
- 7.1.3 Notes on LSF-HPC 87
- SLURM_JOBID=53 89
- SLURM_NPROCS=4 89
- 7-6 Using LSF 90
- 7.3.1 Getting Status of LSF 91
- $ bhosts 92
- 7-8 Using LSF 92
- 7.4 Submitting Jobs 93
- 7.4.3 Submitting a Serial Job 97
- Using LSF 7-17 101
- 7-18 Using LSF 102
- Using HP-MPI 111
- 8.3.3 Using srun with HP-MPI 114
- 8.3.4 Using LSF and HP-MPI 116
- 8.3.5 MPI Versioning 117
- 8.6 Truncated Messages 118
- 8.5 32-Bit B uilds on XC4000 118
- Using HP-MPI 8-9 119
- 8.9 Environment Variables 120
- 8.9.5 MPI_PIN_PERCENTAGE 121
- 8.9.6 MPI_PAGE_ALIGN_MEM 121
- 8.9.7 MPI_MAX_WINDOW 121
- 8.9.8 MPI_ELANLOCK 121
- 8.9.9 MPI_USE_LIBELAN 121
- 8.9.10 MPI_USE_LIBELAN_SUB 122
- Work-arounds 124
- Using HP MLIB 125
- 9.1.2 MLIB and Module Files 126
- 9.2.1 Platform Sup port 126
- 9.2.2 Library Support 126
- 9.2.3 MPI Parallelism 126
- 9.2.4 Modulefiles and MLIB 127
- 9.2.6 Compiling and Linking 127
- 9.2.7 Licensing 128
- 9.2.8 MLIB Man pages 128
- 9.3.1 Platform Sup port 128
- 9.3.2 Library Support 128
- 9.3.3 MPI Parallelism 129
- 9.3.4 Modulefiles and MLIB 129
- 9.3.5 Compiling and Linking 129
- 9.3.6 Licensing 130
- 9.3.7 MLIB Man pages 130
- Advanced Topics 131
- Examples 135
- $ lshosts 140
- Show the environment: 142
- Run the job: 142
- View the running job: 142
- View the finished job: 142
- Examples A-9 143
- Glossary 145
- Glossary-2 146
- Glossary-3 147
- Glossary-4 148
- Glossary-5 149
- Glossary-6 150
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