RFR (S): 8001564: The load balancing function steal_1_random in taskqueue is not random

[Erik Helin]

Hi everyone,

the webrev can be found at:

http://cr.openjdk.java.net/~brutisso/8001564/webrev.00/

Summary:
There are three different algorithms in taskqueue.hpp for stealing an 
item from a taskqueue:
- steal_best_of_2
- steal_best_of_all
- steal_1_random

However only steal_best_of_2 is currently in use, steal_best_of_all and 
steal_1_random are not used at all (not anywhere in the hotspot source 
code).

Furthermore the function steal_1_random has a bug in it, as explained in 
8001564.

This change removes the functions steal_best_of_all and steal_1_random, 
thereby preventing bit rot as in the case of steal_1_random and also 
fixing bug 8001564.

Testing:
JPRT

Thanks,
Erik