RFR: 8180421: Change default value of BiasedLockingStartupDelay to 0

[Robbin Ehn]

Hi all, please review.

On behalf of Stefan J, this patch changes the default value of BiasedLockingStartupDelay to 0.
"The delay is however a problem for the some of the GC algorithms that use the mark-word."
"Benchmark runs doesn't show any regressions for either startup times or steady state performance when setting it to 0."

CSR: https://bugs.openjdk.java.net/browse/JDK-8181778
Issue: https://bugs.openjdk.java.net/browse/JDK-8180421

Thanks!

/Robbin

diff -r 26a2358e2796 src/share/vm/runtime/globals.hpp
--- a/src/share/vm/runtime/globals.hpp	Fri Jun 23 15:16:23 2017 -0700
+++ b/src/share/vm/runtime/globals.hpp	Mon Jun 26 15:03:34 2017 +0200
@@ -1307,1 +1307,1 @@
-  product(intx, BiasedLockingStartupDelay, 4000,                            \
+  product(intx, BiasedLockingStartupDelay, 0,                               \