Hello all,
I try to build an array[AtomicBoolean] and meet a problem that: there
is an "Segmentation fault" error when the size of the array is 500M,.
The test code is below that I try to build the array with size N and
initialize each element as "true" .
import x10.util.concurrent.AtomicBoolean;
public class test {
public static def main(args: Array[String]) {
val n=Int.parse(args(0));
val N=Math.pow(2,n) as Int;
Console.OUT.println(N);
var c:Array[AtomicBoolean]=new Array[AtomicBoolean](N);
for(i in 0..(N-1)){
c(i)=new AtomicBoolean(true);
}
Console.OUT.println(n+" has done");
}
}
I try the input n with 25,26,27,28,29,30. And the test results are
below. It shows that 25,26,27,28 work well, but meet the "Segmentation
fault" when trying with 29. I empty the cache and run 29 alone, but
still meet the problem. And when I try with 30, I wait minutes and the
program seems just hang there. This thing also happens with
"AtomicInteger". The memory of my machine is 128GB, is there any
comment about this?
//ps: Though the method var c:Array[AtomicBoolean]=new
Array[AtomicBoolean](N, new AtomicBoolean(true)) works, but that is
not I want.
33554432
25 has done
67108864
26 has done
134217728
27 has done
268435456
28 has done
536870912
Segmentation fault
Thanks a lot!
Long
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