Yes, I think COW is not mandatory for Parrot. Thanks, -xiaofeng On Sun, Apr 6, 2008 at 10:32 PM, Senaka Fernando <[EMAIL PROTECTED]> wrote: > Hi Xiao-Feng, Alexei, > > Thanks for the update. I'm not 100% aware of the usefulness of COW beyond > the scope of the Parrot VM, since this is a VM, the usefulness of COW would > depend on the upper layers that use it. Thus, perhaps when thinking about > uses of Parrot, and as we are interested in plugging the Harmony GC_Gen to > Parrot, we might need to support COW at least at an intermediate layer. > > Most probably as it seems I believe that this can be handled in the > interfacing (porting) layer between Harmony and Parrot, which seems a bit > required in terms of interface aligning, as it seems. But, the approach > shouldn't need a 1-1 wrapper. This can rather be tailored to address > problems that may arise when aligning the interfaces. > > Regards, > Senaka > > > > On Sun, Apr 6, 2008 at 7:18 PM, Xiao-Feng Li <[EMAIL PROTECTED]> wrote: > > > Harmony GC doesn't have COW support (at the moment). COW can help to > > reduce the footprint when multiple processes are forked sharing data. > > It's not useful for Java (at the moment) because Java uses threads > > mostly. Before we have real needs (workloads) for COW, we are not > > able to give an appropriate design. > > > > Thanks, > > xiaofeng > > > > On Sun, Apr 6, 2008 at 7:27 PM, Senaka Fernando <[EMAIL PROTECTED]> > > wrote: > > > Hi Alexei, > > > > > > This issue came up when I was trying to match interfaces of Harmony > > GC_Gen > > > and Parrot. It seems that the Parrot GC is aware on whether COW is > > used. > > > > > > ex:- clear_cow, used_cow in dod.h > > > > > > It seems that it maintains a COW ref count etc. > > > > > > Regards, > > > Senaka > > > > > > On Sun, Apr 6, 2008 at 4:39 PM, Alexei Fedotov < > > [EMAIL PROTECTED]> > > > wrote: > > > > > > > > > > > > > Hello Senaka, > > > > > > > > Copy-on-write semantics is used for native strings, see unistr.h If > > GC > > > > would use copy-on-write, this would be rather implementation than > > > > interface. Why do you need this info? > > > > > > > > Thanks. > > > > > > > > On Sun, Apr 6, 2008 at 12:36 PM, Senaka Fernando <[EMAIL PROTECTED] > > > > > > > wrote: > > > > > Hi all, > > > > > > > > > > Need info on copy-on-write support on Harmony. I tried grepping > > the > > > > source > > > > > but didn't uncover any related info. I also tried googling which > > was > > > > not > > > > > that helpful. I would like to know whether Harmony has this > > feature? > > > > and a > > > > > possible hint on where I should be looking would be really > > helpful. > > > > > > > > > > Regards, > > > > > Senaka > > > > > > > > > > > > > > > > > > > > > -- > > > > With best regards, > > > > Alexei > > > > > > > > > > > > > > > -- > > http://xiao-feng.blogspot.com > > >
-- http://xiao-feng.blogspot.com
