Hp XC System 2.x Software Manuel d'utilisateur Page 117
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Example 8-5: Allocating 12 Processors on 6 Nodes
$ bsub -I -n12 $MPI_ROOT/bin/mpirun -srun -n6 -N6./a.out 1
Note that LSF jobs can be submitted without the -I (interactive) option.
8.3.5 MPI Versioning
The mpirun command includes an option to print the versio n number. The -version option
used with mpirun displays the major and minor version n umbers. The mpi.h header includes
matching constants as HP_MPI and HP_MPI_MINOR.
8.4 System Interconnect Support
HP-MPI on HP XC provides the following system interconnec
t suppo rt:
• Quadrics E lan4 protocol on Itanium® 2-based systems with sup port for srun startup,
which is equivalent to prun on non-X C Elan systems.
• IT-API on InfiniBand. To use InfiniBand on XC, do not link -static. You must use
dynamic linking.
• Myrinet GM2.1
• TCP/IP on supported system interconnects (for exam ple, Gigabit Ethernet)
• Shared memory for intranode communicatio n
8.4.1 HP-MPI Performa nce on HP XC with Mu ltip le System Interconnects
HP-MPI attempts to choose the best sys tem interconnect fo r an application on XC systems. If
an HP XC system has more than one high-speed system interconnect available, H P-MPI will
attempt to use the fastest available. This choice is based on a default ordering of Quadrics
(Elan), Myrinet (GM ) , InfiniBan d (I T -AP I), o r Gigabit Ethernet (TCP/IP). This d efault ordering
can be redefined by using the MPI_IC_ORDER environment variable.
There may be situations where an HP XC system has both Gigabit Ethernet and another
high-speed system intercon nect. You may prefer to run your applicatio n o n t he Gigabit Ethernet
system interconnect. To accomplish this, the mpirun command must be instructed to use the
TCP protocol for com munication and the system interconnect path must be specified by using
the -TCP option. By default, mpirun uses the system interconnect associated with what is
returned by hostname, which usually corresponds to the non-Gigabit Ethernet high-speed
system interconnect present. In these situations, you need to explicitly specify the Gigabit
Ethernet subnet to be used w ith the -subnet o ption.
To de
termine the proper subnet, run the follow ing command, or ask your system administrator
for
the s ub net address corresponding to Gigabit E th ernet.
$ /usr/sbin/ifconfig -a
Look for the eth1 interface w hich should be using a private network address, probably starting
with 172.*.*.*. For example:
eth1 Link encap:Ethernet HWaddr 00:30:6E:4A:02:5E
inet addr:172.20.0.136 Bcast:172.255.255.255 Mask:255.0.0.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:84194577 errors:0 dropped:0 overruns:0 frame:0
TX packets:211420929 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:6252673093 (5963.0 Mb) TX bytes:313590775738 (299063.4Mb)
Interrupt:56
Using HP-MPI 8-7
- 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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