+------------------------------+
                   |          coNCePTuaL          |
                   |          ----------          |
                   |  A network correctness and   |
                   | performance testing language |
                   |                              |
                   |       By Scott Pakin,        |
                   |        pakin@lanl.gov        |
                   +------------------------------+


Description
===========

coNCePTuaL is a domain-specific programming language for rapidly
generating programs that measure the performance and/or test the
correctness of networks and network protocol layers.  A few lines of
coNCePTuaL code can produce programs that would take significantly
more effort to write in a conventional programming language.


Installation
============

The basic installation procedure is as follows:

    ./configure     <== Creates a Makefile
    make            <== Uses the Makefile to build coNCePTuaL
    make check      <== Verifies that coNCePTuaL built properly [optional]
    make install    <== Installs coNCePTuaL

In practice, however, it is common to pass arguments to configure to
customize coNCePTuaL's configuration.  Running "./configure --help"
provides information about the various options and the coNCePTuaL
user's guide (doc/conceptual.pdf) expounds upon these in greater
detail.  A non-root user installing coNCePTuaL for his own use (as
opposed to the root user installing coNCePTuaL cluster-wide) will
typically issue a command like the following:

    ./configure --prefix=/home/pakin/conceptual

The preceding --prefix option tells "make install" to install into
/home/pakin/conceptual/bin, /home/pakin/conceptual/lib,
/home/pakin/conceptual/man, etc. instead of the default
/usr/local/{bin,lib,man}.  (Of course, "/home/pakin" should be
replaced with the directory you intend to use as the root of the
coNCePTuaL installation tree.)

To reconfigure coNCePTuaL after running "./configure" and "make", run
"make distclean" to restore coNCePTuaL to its pre-"./configure" state.


Usage
=====

The coNCePTuaL distribution comes with a large set of sample programs.
Here's how one might compile and run a latency test using the c_udgram
backend (which runs locally on a workstation):

   # Replace [...] with the appropriate directory for your installation
   # (e.g., /usr/local/share/conceptual).
   ncptl --backend=c_udgram --output=latency [...]/examples/latency.ncptl

   # The following should take a bit of time to run.  If the dynamic
   # linker can't find the ncptl library then you should append the
   # full path of the coNCePTuaL [...]/lib/ directory to your
   # LD_LIBRARY_PATH environment variable.
   ./latency --tasks=2

   # Let's look at the results.
   cat latency-0.log

See the coNCePTuaL user's guide (doc/conceptual.pdf) for a thorough
description of coNCePTuaL usage.


Copyright and License
=====================

coNCePTuaL is provided under a BSD-ish license.  See the LICENSE file
for the full text.

Los Alamos National Security, LLC (LANS) owns the copyright to
coNCePTuaL (identified internally as LA-CC-03-099).


Author
======

Scott Pakin, pakin@lanl.gov