On Tue, 22 Apr 2014 08:46:40 -0500, Mark Zelden wrote: >On Mon, 21 Apr 2014 23:03:24 +0100, Martin Packer wrote: > >>I think the term "pointer compression" is relevant here - to java heap >>just above 2GB. >> > >Yes. Very clever. > ... >I didn't realize it was being done on other platforms also.
Linux (on x86_64) has been doing it "forever" - goes even further, allowing reference to a 32 Gig heap rather than just 4 Gig. It uses what we would call double word alignment, so drops the (always zero) bottom 3 bits for offset calculations. Haven't looked at how zLinux works. Shane ... ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
