These options were always available in DRLVM, and [1] only made them available for configuration from command line.
Pavel. P.S. I can also recall some issues related to changing order of fields which were introducing measurable preformance loss on various benchmarks. On Fri, Dec 19, 2008 at 11:16 AM, Aleksey Shipilev <[email protected]> wrote: > Hi, Xiaoming! > > If I recall correctly, field sorting incurs some performance > degradations on some of SPECjvm2008 benchmarks. But it helps > SPECjbb2005 a lot, say +1-2%. Here's the issue [1], where these > options were introduced. > > Thanks, > Aleksey. > > [1] https://issues.apache.org/jira/browse/HARMONY-5040 > > On Fri, Dec 19, 2008 at 10:25 AM, xiaoming gu <[email protected]> wrote: >> Hi, all. I'm studying fields' offsets these days. I find there are some >> ordering operations for instance fields and static fields seperately in >> assign_offsets_to_fields() in Prepare.cpp. These orderings are according to >> field size to reduce internal fragmentation. I don't know why such >> operations are turned off by default. Is there any concern I missed? Thanks. >> >> Xiaoming >> >> -- >> I believe that unarmed truth and unconditional love will have the final word >> in reality. --Martin Luther King Jr. >> >
