RFR: Enable biased locking for Shenandoah by default

[Aleksey Shipilev]

On 11/20/2017 12:41 PM, Roman Kennke wrote:
> Any idea if/how this affects latency?

Few thoughts here:

 *) Biased locking is inherently orthogonal to GC code, and is not visible even in gross GC pauses.
Therefore, we have no observable improvements, as far as GC logging is concerned. (This is different
for loop strip mining, that does improve gross pause times);

 *) With the throughput hit we observe, it makes less sense to focus on orthogonal VM pauses.

Thanks,
-Aleksey