ANNOUNCE: tkpvm1.0b1. First beta release available now 
Author Message
 ANNOUNCE: tkpvm1.0b1. First beta release available now

What is tkPvm

tkPvm is the result of a wedding. The husband is pvm3.3.x (preferably 3.3.7)
and the wife is Tk4.0 or Tk3.6 (preferably 4.0). Probably it will work
unchanged for pvm3.4.0, but that is not released yet so I cannot try it.
As usual with a marriage, both sides profit from the combination:

        The tcl-language is an interpreted scripting language. With
        TkPvm you can now write pvm processes in the Tcl language, as
        opposed to C or fortran. No compilations are necessary any more,
        once you created pvmsh and pvmwish. The shell program pvmsh can
        be seen as an enhanced version of the pvm console. It can control
        the virtual machine in the same way as the pvm console does, but
        it is a full shell with history substitution ('!!'), variables,
        arthimetics and much more. The pvmwish interpreter has the same
        function as pvmsh, but in addition it has a lot of commands to
        build your own grapical user interface. There are buttons, entry
        widgets, menu's and so on. Now each process can have input and
        output through it's own X11-window.

        PVM is a library for controlling a virtual parallel machine which
        consists of any number of hosts. Processes can spawn and kill each
        other and communicate  through a pvm-channel. It can be compared
        with the Tk 'send' command, only it works with sockets. Therefore
        it runs without Tk (X11), and the processes can use different
        displays and run on different hosts. In addition, pvmsh has access
        to the same event loop as Tk 4.0. This means that you now can use
        the 'after' and 'fileevent' commands without tk and X11.

The pvm-related commands that can be used in Tcl now are:

send, recv
    Send and recieve anything from or to any other process. The
    send command now can be used without X11, but the original
    syntax is still supported and still works the same way.
spawn, kill
    Spawn and kill other processes.
    Request information about running tasks. (This command will be
    expanded in the next version)
    Bind pvm-related events in the Tcl/Tk event loop. This is a very
    powerful command which makes programming an event-driven
    application much easier. To do the same in C or Fortran is much
    more difficult. PVM has no equivalent function for this. Tk has,
    but originall it is only used for X-events. Now the same can be
    done with PVM-events too.

And many more..... (see http://www.*-*-*.com/ )

Some demo's from the pvm3 distribution have been translated to Tcl/Tk.,
ready to run after you installed pvmsh and pvmwish. For example the
"hello" and "hello_other" demo's can now be written in resp 5 and 2
lines of Tcl-code. Compare that with the 18 lines of C-code, both for
hello_other.c and hello.c. And these run without compilation:
*************** hello.tcl *******************
puts stdout "i'm [id]"
bind [spawn [pwd]/hello_other.tcl] 1 {
    puts stdout "from %t: [recv string]"


************** hello_other.tcl **************
send parent 1 "hello, world from $env(HOST)"

How to install tkPvm

First, install Tcl7.4 and pvm3.3.7. If you want graphical capabilities
you need Tk4.0 too. These can be downloaded from:

For pvm3.3.7, don't forget that the environment variables PVM_ROOT
and PVM_ARCH need to be set at all times. Best is to define these in
your '.cshrc'. Also, it is useful to add several paths that are used
for pvm to the 'path' variable (for the executables) and the
'LD_LIBRARY_PATH' environment variable (the pvm libraries). All
 information about this is available inside the pvm distribution.

It is advised that you use shared libraries as much as possible,
although tkpvm will run fine without it. The NICI ftp-server has
patches available for Tcl7.4 and Tk4.0 to archive that. Copy the
patch files to the main directories of Tcl7.4 and Tk4.0, and run
the GNU 'patch' utility. Gunzip (to uncompress .gz-files), patch
and the patches for Tcl7.4 and Tk4.0 can be downloaded from:

More Information about Tcl/Tk, PVM and tkPvm

There is a Tcl/Tk home page < http://www.*-*-*.com/ ;
and a PVM home page < http://www.*-*-*.com/ ; on the WWW. And there

A new home page for tkpvm is available now at the NICI WWW server:


These pages will be updated for future releases of tkpvm.

        Jan Nijtmans
        NICI (Nijmegen Institute of Cognition and Information

        url:   http://www.*-*-*.com/ ~nijtmans/

Tue, 13 Jan 1998 03:00:00 GMT  
 [ 1 post ] 

 Relevant Pages 

1. ANNOUNCE: tkpvm1.0 second beta release available.

2. Announcing the first beta release of the Technical Analysis Library

3. ANNOUNCE: JPE, the Java-Python Extension - first beta release

4. ANNOUNCE: JPE, the Java-Python Extension - first beta release

5. ANNOUNCE: First beta release of Tcl-DP, Version 3.3

6. First beta release of d2c CodeWarrior plugin available

7. ANNOUNCE: Tkpvm1.0b3 released

8. ANNOUNCE: First release of Teacher Hypertools available

9. ANNOUNCE: GroupKit 3.1 Beta 2 release available

10. ANNOUNCE: scgi 1.0b1 released

11. ANNOUNCE: SnackAmp 2.0b1 Release

12. ANNOUNCE - Fltk 0.3 Bugfix Release 0b1


Powered by phpBB® Forum Software