Re: GNU Java Compiler and Swarm

[pauljohn]

"Marcus G. Daniels" wrote:
> 
> PJ> thread "main" java.lang.AbstractMethodError: createBegin at
> 
> First make sure that you have the Swarm libraries and GCJ libraries in
> the LD_LIBRARY_PATH.

That got it.  Explicitly adding /usr/lib/swarm made the difference:

$ export
LD_LIBRARY_PATH=/usr/lib/swarm/:/usr/local/gcc3/lib/:$LD_LIBRARY_PATH
$ export PATH=/usr/local/gcc3/bin:$PATH
$ time ./model -b
You typed `heatbugs -b' or  `heatbugs --batch' so we're running without
graphics.
Heatbugs is running for 300 timesteps
It is logging data every 1 timesteps to: unhappiness.output
quitting at 300

real    0m43.459s
user    0m42.380s
sys     0m0.060s

This is still much slower than the objective-c version. Do you see it
too?

But it is totally cool to think I might someday profile and debug a java
program with the gnu tools I'm starting to understand.  I can already
run jheatbugs under gdb already, and it gives some information. Cool.
Look here:

$ gdb ./model
(gdb) break HeatbugModelSwarm.java:222
(gdb) run

Breakpoint 4, HeatbugModelSwarm.buildObjects() (this=0x8196de0)
    at ./HeatbugModelSwarm.java:222
222             getIntegerWithMin$withMax (minOutputHeat,
maxOutputHeat);

(gdb) print * this
$1 = {<swarm.objectbase.SwarmImpl> = {<java.lang.Object> = {vtable =
0x8053ce0,
      sync_info = 0x0}, <swarm.activity.SwarmProcess> = <invalid
address>, <swarm.activity.SwarmProcessS> = <invalid address>,
<swarm.objectbase.SwarmS> = <invalid address>, <swarm.objectbase.Swarm>
= <invalid address>, <No data fields>}, numBugs = 100,
  evaporationRate = 0.98999999999999999, diffuseConstant = 1, worldXSize
= 80,
  worldYSize = 80, minIdealTemp = 17000, maxIdealTemp = 31000,
minOutputHeat = 3000,
  maxOutputHeat = 10000, randomMoveProbability = 0,
randomizeHeatbugUpdateOrder = false,
  modelActions = 0x0, modelSchedule = 0x0, heatbugList = 0x819e300,
world = 0x810be30,
  heat = 0x8234dc0, actionForEach = 0x0}

This is an awesome improvement, in my opinion.


-- 
Paul E. Johnson                       email: address@hidden
Dept. of Political Science            http://lark.cc.ukans.edu/~pauljohn
University of Kansas                  Office: (785) 864-9086
Lawrence, Kansas 66045                FAX: (785) 864-5700

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