Hi Eliot, I have a question still on segmented memory.
Consider an object “c := OrderedCollection new”. It is likely that the internal "array” and the object c will be in the same generation and in the same memory segment. If I add, let’s say, 30 000 000 elements into c. After the addition the array will be very very big. Which means that it may be in a different segment memory than the one that contains “c”. Do you feel this may be a problem? I am thinking about a long jump between c and array. Long jumps cost more than short jumps right? Do you feel there are some suboptimal situation with this situation? Alexandre NB: I cc the mailing list to see whether other may help in understand better what’s going on with segment and generations -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;. On Nov 19, 2013, at 1:37 PM, Eliot Miranda <eliot.mira...@gmail.com> wrote: > Hi Alexandre, > > > On Mon, Nov 18, 2013 at 7:40 AM, Alexandre Bergel <alexandre.ber...@me.com> > wrote: > Hi Eliot, > > Stef told me you are working hard on improving the Pharo VM. > In particular making the VM support fragmented memory. If I understand > correctly, this will relieve the VM from having a continuous block of memory > to hold the whole image. Really cool! > > A better term is segmented memory. fragmentation in memory management means > free space getting divided into too small pieces to be useful. > > I have a general question regarding VM. Are you aware of other Virtual > machines supporting this? Does the Java VM support fragmented memory? .Net? > V8? > > Any VM that uses the train algorithm supports segmented memory. Any VM that > uses "pools" or "regions" uses segmented memory. VisualWorks' VM supports > segments. I'm pretty sure that V8 .Net & HotSpot provide segmented memory. > > > I would like to mention this in a research paper I am working on. > > Cheers, > Alexandre > -- > _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: > Alexandre Bergel http://www.bergel.eu > ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;. > > > > > > > -- > best, > Eliot
