Hi there,
the appended program shows nondeterministic behaviour. Sometimes it
finishes, most times it runs into an endless loop. It happends with both
native and managed X10. I am using the repository revision 29129 of X10,
java 1.8.0_40 and gcc 4.8.2.
With an older version of X10 (2.4.3.2), the program terminates just fine.
One observation I was able to make: the program terminated only, if
X10_RESILIENT_MODE was set to 1. If it was unset, I was not able to
observe termination (but this could be pure coincidence...).
Environment variables and compile-command used (command line parameter
only prevents flooding your console):
$ >export X10_NPLACES=2 X10_NTHREADS=1
$ >x10c++ ../src/Hello.x10 -o Hello && ./Hello 5000000
Could someone explain to me, what is going wrong or what changed?
Thanks in advance,
Marco
import x10.compiler.Volatile;
import x10.xrx.Runtime;
public class Hello {
@Volatile transient var finished:Boolean = false;
public static def main(args:Rail[String])
{
val group:PlaceGroup = Place.places();
val init:() => Hello = () =>
{
return (new Hello());
};
val plh:PlaceLocalHandle[Hello]
= PlaceLocalHandle.makeFlat(group, init);
val maxI:Long = Long.parseLong(args(0));
Console.OUT.println(here + ": starting.");
at (Place(1)) async
{
Console.OUT.println(here + ": sleeping.");
System.sleep(100);
Console.OUT.println(here + ": stopping Place(0).");
at (Place(0)) async
{
plh().finished = true;
Console.OUT.println(here + ": finished=true.");
}
}
var i:Long = 0;
while (!plh().finished)
{
++i;
if (i >= maxI)
{
Console.OUT.println(here + ": probing.");
i = 0;
}
Runtime.probe();
}
Console.OUT.println(here + ": stopping.");
}
}------------------------------------------------------------------------------
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