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README

JIST (Java In Simulation Time) Project
Timestamp: <README Tue 2004/04/06 11:54:06 barr pompom.cs.cornell.edu>

Copyright (C) 2004 by Cornell University
All rights reserved.
Refer to LICENSE for terms and conditions of use.


Contents of this README:
  PROJECT         - Project details
  GETTING STARTED - Things to look at first
  LAYOUT          - Directory structure
  COMPILE         - How to compile JiST
  EXECUTION       - How to run JiST
  MISCELLANEA     - Additional tidbits


PROJECT
-------
Please refer to:
  http://www.cs.cornell.edu/barr/repository/jist/


GETTING STARTED
---------------

- Samples JiST and SWANS simulations can be found in:
    jist/minisim/*.java
    driver/*.java
- JiST and SWANS user guides:
    http://jist.ece.cornell.edu/jist-user/index.html
    http://jist.ece.cornell.edu/swans-user/index.html
- Paper: JiST - An efficient approach to simulation using virtual machines
    http://jist.ece.cornell.edu/docs/040827-jist-vmsim-spe.pdf
- Other documentation:
    http://jist.ece.cornell.edu/docs.html


LAYOUT
------

This package contains:

  src - JiST project source code
    jist/runtime - simulation framework
    jist/minisim - small test/benchmarking simulations
    jist/swans   - Scalable Wireless Ad hoc Network Simulation (SWANS)
      .../field/   - SWANS entities/layers
      .../radio/
      .../mac/
      .../net/
      .../route/
      .../trans/
      .../app/
        (etc.)
      .../misc/    - utility classes
    memprof - JiST memory profiler
    driver - sample SWANS simulations
  bin - useful command-line scripts
  bench - glomosim and ns2 benchmarks
  libs - various required Java libraries


COMPILE
-------

1.  Set your environment
      Add the following to your path:
      - java 
      - javac, rmic
      - ${JIST_CODE}/bin
      Set the following variables
      - JAVA_HOME
      Ensure that your CLASSPATH contains:
      - jist.jar, or the jist directory
      - the .jar files of all the libraries mentioned below.
      - any of your simulation development directories

2.  From the top directory, run:
      make

    All the necessary library dependencies are included within 
    the source tree under lib/. Specifically, JiST uses the following:
    - JArgs - Command-line argument processing:
        http://jargs.sourceforge.net/
    - Log4j - Logging framework:
        http://jakarta.apache.org/log4j/
    - BCEL - Byte-Code Engineering Libary:
        http://jakarta.apache.org/bcel/
    - BeanShell - Scripting engine:
        http://www.beanshell.org/
    - Jython - Scripting engine:
        http://www.jython.org/


EXECUTION
---------

Running JiST:

Note: 'jist -h' option will provide syntax help. We like some standard
configurations for convenience.

1.  Local execution of a simulation
      jist <simulation>
      -- where: <simulation> is some class in the classpath

2.  Run JiST with specific properties file
      jist -c <properties> <simulation>
    Sample properties files are included:
      src/jist.properties (default)
      src/debug.properties
      src/debug-rewrite.properties
      src/debug-controller.properties
      src/off.properties

3.  Disable rewriter caching
      jist --nocache <simulation>
    By default, JiST engine caches rewritten simulation class files
    to improve startup times.

4.  Use a script to configure a simulation
      jist --bsh <script>
      jist --jpy <script>
    These invoke the BeanShell and Jython scripting engines, respectively.

5.  Start a JiST processing server with a local job queue
      jist -S
    This server will listen on the default JiST port (3000), and process jobs 
    on a first-come, first-served basis. You can specify an alternative port
    with '-p <port>'.

6.  Start a job queue server
      jist -S -q
    This server will listen for incoming simulation jobs, but does 
    not perform processing. JiST processing servers will connect and 
    dequeue from here. The default port can be changed as above.

7.  Start a JiST processing server with a remote job queue.
      jist -S -r host:port

8.  We can queue a simulation at a job queue.
      jist -r host:port <simulation>
    This client will enqueue the simulation and wait for processing to
    complete. The client will provide the server with all the classes
    that it needs and will receive redirected output and error streams.

9.  Running SWANS is a simple matter:
      jist jist.swans.Main <driver>
    Or, just abbreviate this to:
      swans <driver>
    The SWANS command-line syntax can be viewed by running:
      swans -h

10. Using the proxy server to connect clients and servers through NAT boxes and
    firewalls: First, run the ProxyPoint server somewhere on the Internet:
      java jist.runtime.ProxyPoint
    Then, use -x switch on clients, servers and the server queue.


MISCELLANEA
-----------
profiles:
  java -Xrunhprof:cpu=samples,cutoff=0.0025 jist.runtime.Main jist.minisim.events -m null -n 100000000
  jistprof sim
  jistprofcpu sim | profadd.py

rewriting:
  find all the continuable methods:
    jist --nocache -c debug-rewrite.properties <sim> | grep "Found continuable"
  find all the blocking methods:
    jist --nocache -c debug-rewrite.properties <sim> | grep "Found blocking"
  prime the rewriter cache:
    jist jist.minisim.prime -d <directory>
  perform flow analysis
    jistflow <class file>

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