PVM_INTRO(1PVM) — Commands
NAME
PVM − Parallel Virtual Machine System Version 3
DESCRIPTION
PVM is a software system that enables a collection of heterogeneous computers to be used as a coherent and flexible concurrent computational resource.
The individual computers may be shared- or local-memory multiprocessors, vector supercomputers, specialized graphics engines, or scalar workstations, that may be interconnected by a variety of networks, such as ethernet, FDDI.
User programs written in C, C++ or Fortran access PVM through library routines (libpvm3.a and libfpvm3.a).
Daemon programs (pvmd3) provide communication and process control between computers.
MACHINE ARCHITECTURE
In the PVM system, machines are assigned a short string to identify their architectures (this includes operating system type as well as CPU type). The types currently predefined in the distribution are:
AFX8 Alliant FX/8
ALPHA DEC Alpha/OSF-1
ALPHAMP DEC Alpha/OSF-1 / using shared memory
BAL Sequent Balance
BFLY BBN Butterfly TC2000
BSD386 80[345]86 running BSDI or BSD386
CM2 Thinking Machines CM-2 Sun front-end
CM5 Thinking Machines CM-5
CNVX Convex using IEEE floating-point
CNVXN Convex using native f.p.
CRAY Cray
CRAY2 Cray-2
CRAYSMP Cray S-MP
CSPP Convex Exemplar
DGAV Data General Aviion
E88K Encore 88000
FREEBSD 80[345]86 running FreeBSD
HP300 HP 9000 68000 cpu
HPPA HP 9000 PA-Risc
HPPAMP HP 9000 PA-Risc / shared memory transport
KSR1 Kendall Square
I860 Intel RX Hypercube
IPSC2 Intel IPSC/2
LINUX 80[345]86 running Linux
MASPAR Maspar
MIPS Mips
NETBSDAMIGA
Amiga running NetBSD
NETBSDHP300
HP 300 running NetBSD
NETBSDI386 80[345]86 running NetBSD
NETBSDMAC68K
Macintosh running NetBSD
NETBSDPMAX
DEC Pmax running NetBSD
NETBSDSPARC
Sparc running NetBSD
NETBSDSUN3
SUN 3 running NetBSD
NEXT NeXT
PGON Intel Paragon
PMAX DEC/Mips arch (3100, 5000, etc.)
RS6K IBM/RS6000
RS6KMP IBM SMP / shared memory transport
RT IBM/RT
SCO 80[345]86 running SCO Unix
SGI Silicon Graphics IRIS
SGI5 Silicon Graphics IRIS running OS >= 5.0
SGI64 Silicon Graphics IRIS running OS >= 6.0
SGIMP Silicon Graphics IRIS / OS 5.x / using shared memory
SGIMP64 Silicon Graphics IRIS / OS 6.x / using shared memory
SP2MPI IBM SP-2 / using MPI
SUN3 Sun 3
SUN4 Sun 4, 4c, sparc, etc.
SUN4SOL2 Sun 4 running Solaris 2.x
SUNMP Sun 4 / using shared memory / Solaris 2.x
SX3 NEC SX-3
SYMM Sequent Symmetry
TITN Stardent Titan
U370 IBM 3090 running AIX
UTS2 Amdahl running UTS
UVAX DEC/Microvax
VCM2 Thinking Machines CM-2 Vax front-end
UXPM Fujitsu running UXP/M
ENVIRONMENT VARIABLES
The following environment variables are used by PVM and may be used to customize your PVM environment. If you set them, you should do so in your .cshrc or .profile file.
PVM_ROOT
The path where PVM libraries and system programs are installed, for example /usr/local/pvm3 or $HOME/pvm3. This variable must be set on each host where PVM is used in order for PVM to function. There is no default value.
PVM_EXPORT
Names of environment variables to export from a parent task to children tasks through pvm_spawn(). Multiple names must be separated by ’:’. If PVM_EXPORT is not set, no environment is exported.
PVM_DEBUGGER
The debugger script to use when pvm_spawn() is called with PvmTaskDebug set. The default is $PVM_ROOT/lib/debugger.
PVM_DPATH
[v3.3.2 and later] The path of the pvmd startup script (default is $PVM_ROOT/lib/pvmd). It is overridden by host file option dx=.
This variable is useful if you use a shell that doesn’t automatically execute a startup script (such as .cshrc) to allow setting PVM_ROOT on slave (added) hosts. If you set it to the absolute or relative path of the pvmd startup script (for example /usr/local/pvm3/lib/pvmd or pvm3/lib/pvmd), the script will automatically set PVM_ROOT. Note that for this to work, you must set it to run the pvmd script, not the pvmd3 executable itself.
PVMDLOGMAX
[v3.3.8 and later] Sets the maximum length of the pvmd error log file. Default value is the PVMDLOGMAX parameter in the source, 1 Mbyte.
PVMDDEBUG
[v3.3.8 and later] Sets the default pvmd debugging mask (as does the pvmd -d option). Value should be a hexadecimal number. Used to debug the pvmd (not intended to be used to debug application programs).
PVMTASKDEBUG
[v3.3.8 and later] Sets the default libpvm debugging mask (as does pvm_setopt(PvmDebugMask, x)). Value should be a hexadecimal number. Used to debug libpvm (not intended to be used to debug application programs).
PVMBUFSIZE
Sets the size of the shared memory buffers used by libpvm and the pvmd. The default value is 1048576. If your program composes messages longer than this size, you must increase it.
PVMKEY
PVM uses this value, combined with the process id, to generate shared-memory segment keys. The default value is your numeric uid. PVM automatically detects collisions when generating a key and picks a new key, so it should almost never need to be set explicitly.
The following environment variables are used by PVM internally. With the exception of PVM_ARCH, their values should not be modified. This is for information only.
PVM_ARCH
The PVM architecture name of the host on which it is set, used to distinguish between machines with different executable (a.out) formats. Copies of a program for different architectures are installed in parallel directories named for PVM architectures.
PVMSOCK
Is passed from pvmd to spawned task, and gives the address of the pvmd local socket.
PVMEPID
Holds the expected process id of a spawned task exec’d by the pvmd. The task uses this value to identify itself when reconnecting to the pvmd.
PVMTMASK
[v3.3 and later] The libpvm trace mask, passed from the pvmd to spawned tasks.
SEE ALSO
aimk(1PVM), pvm(1PVM), pvmd3(1PVM), PVM 3.3 User’s Guide and Reference Manual
AUTHORS
A. L. Beguelin [4,5], J. J. Dongarra [1,2], G. A. Geist [2], W. C. Jiang [1], R. J. Manchek [1], B. K. Moore [1], V. S. Sunderam [3]
1. University of Tennessee, Knoxville TN.
2. Oak Ridge National Laboratory, Oak Ridge TN.
3. Emory University, Atlanta GA.
4. Carnegie Mellon University, Pittsburgh PA
5. Pittsburgh Supercomputer Center, Pittsburgh PA
— 11 April, 1995