harmony-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Steve Blackburn <Steve.Blackb...@anu.edu.au>
Subject Re: Terminology etc
Date Thu, 26 May 2005 03:04:13 GMT
Weldon Washburn wrote:

>You advocate starting from a clean slate.
[Interpreting the above as a comment about the harmony project as a 

That's not my position at all. 


I advocate a model where we identify what's at the table and leverage 
that as far as we can in building the Harmony VM.  We mustn't start with 
a clean slate as we have so much in front of us.  I've outlined a 
specific approach in the above email which involves seeding the project 
with existing VMs and concurrently building a new core or cores which 
will utilize existing (and new) components.

When I say "identify what's at the table", I mean that very broadly.  I 
mean, everything from entire code bases, through to code for components, 
through to the availability of external components (the boehm collector 
for example, or someone else's JIT if it were pluggable), through to 
design ideas (how is it that JamVM is so compact? how does ovm do boot 
image stitching? What did Shudo learn when building his JIT?), through 
to mechanisms (how does JCVM do dynamic dispatch?).  Some of this is 
already appearing on the wiki.

My strong feeling is that as a community we have an extraordinary 
advantage of a vast amount of great work from a variety of backgrounds 
which we can freely integrate and build upon.  I feel uncomfortable 
talking too much about MMTk and Jikes RVM because I know that there is a 
phenomonal amount of intersting work out there which we have not started 
hearing about yet.  If Harmony does not leverage this extraordinary 
wealth of ideas, experience (and code), then it would be a missed 
opportunity of great proportions.

I believe that there is an enormous amount we can start working on right 
now, without feeling a need to start writing a core from stratch right 
now, be it in Java or C.  I hope that will emerge very soon.

Really, I think there's not a lot we disagree about.



View raw message