RFR (L): 8058354: SPECjvm2008-Derby -2.7% performance regression on Solaris-X64 starting with 9-b29

[Thomas Schatzl]

Hi all,

  I got a few more internal reviews and suggestions for this change, so
I would like to ask for re-reviews.

http://cr.openjdk.java.net/~tschatzl/8058354/webrev.3/ (full)
http://cr.openjdk.java.net/~tschatzl/8058354/webrev.2_to_3/ (diff)

Changes:

- changed " SIZE_FORMAT" strings in gclog_or_tty->print_cr() format
strings to " SIZE_FORMAT " since this is the correct style.

- moved setup of reserved space with the requirements we have to the
ReservedSpace constructor.

- improve readability: in G1PageBasedVirtualSpace: renamings of
"actual_size" -> "used_size" parameter, _commit_size -> _page_size
member

- G1PageBasedVirtualSpace: changed uintptr_t parameter types to more
fitting size_t

- some refactorings, extracting a few methods to make control flow more
clear

Testing:
jprt, aurora

Thanks,
  Thomas