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Posted to dev@harmony.apache.org by Senaka Fernando <se...@gmail.com> on 2008/03/27 19:55:55 UTC
GSOC 2008: harmony-gc-5
Hi Xiaofeng,
I'm a 3rd year university student with a C/C++ background and also a
reasonable amount of knowledge in Perl and Java. I'm interested in working
on the "*Build a garbage collector for C/C++ programs on the top of Harmony"
project (harmony-gc-5). I would like to know your expectations regarding
this.
I have read through the Markmail archives of the Harmony dev list, and also
the discussion at [1]. And, would like to know a bit more on this project.
[1] http://www.perl6.org/perl6-internals/2007-10/msg00091.html
Thanks,
Senaka Fernando,
Dept. of Computer Science & Engineering,
University of Moratuwa,
Sri Lanka
*
Re: GSOC 2008: harmony-gc-5
Posted by Alexei Fedotov <al...@gmail.com>.
> Btw, what typically constitutes the porting layer?
For GC it is mostly limited to atomic and fence inlinable asm codes
and thread OS calls.
On Fri, Mar 28, 2008 at 12:45 AM, Alexei Fedotov
<al...@gmail.com> wrote:
> Parrot community have a pretty interesting and resourceful test base
> including tests which run regular expressions against their code which
> fail when the code style is not good. The only stress test they have
> is fortunately a test against GC [1], so it may be a good start.
> Generally this would be a good idea to address these questions to
> their list and ask them for cross-mentoring. Building good relations
> and understanding their code of conduct would ease acceptance of your
> work later.
>
> As for the porting layer, Maria tried merging Harmony and Parrot
> porting layers and faced difficulties adjusting our hythread layer
> based on port layer based on apr layer based on OS layer to parrot
> based on source configure-like preprocessing. Another challenge is a
> pure C nature of Parrot code which makes embedding our sources tainted
> with C++ painful. For me it seems feasible to build GC into a separate
> dynamic library using Harmony build system, and plug it into Parrot
> using a binary DLL interface you have to tune.
>
> [1] parrot/t/stress/gc.t
>
>
>
> On Thu, Mar 27, 2008 at 11:21 PM, Senaka Fernando <se...@gmail.com> wrote:
> > Hi Alexei,
> >
> > On Fri, Mar 28, 2008 at 1:17 AM, Alexei Fedotov <al...@gmail.com>
> > wrote:
> >
> > > Hello Senaka,
> >
> >
> > Thanks for the prompt reply.
> >
> >
> > >
> > > Welcome to the community. If I would set expectations for
> > > harmony-gc-5, I would suggest that Parrot VM test base passes on
> > > Parrot with XFL garbage collector plugged in.
> >
> >
> > Since there is a test base I believe I that it would be much easier to track
> > the flow of my work and understand the expectation. Do you believe that the
> > Parrot VM test base would cover all the necessary requirements so that I can
> > take a look of what is expected?
> >
> > Also, I would like to know whether there are any JIRA issues, test branches,
> > etc. or any similar initiatives that you've taken regarding this feature.
> >
> >
> >
> > > This includes subtasks
> > > such as unplugging Harmony GC from DRLVM, adjusting GC interface and
> > > code to work with object layout coded in Parrot PMCs* instead of
> > > layouts accessed via java object virtual tables and resolving porting
> > > layer and linking conflicts.
> >
> >
> > I can rather target these tasks as objectives. Btw, what typically
> > constitutes the porting layer?
> >
> >
> >
> > >
> > >
> > > Thank you for your interest!
> > >
> > > * Which are very different from Apache PMCs.
> >
> >
> > :)
> >
> > Regards,
> > Senaka
> >
> >
> >
> >
> > >
> > > On Thu, Mar 27, 2008 at 9:55 PM, Senaka Fernando <se...@gmail.com>
> > > wrote:
> > > > Hi Xiaofeng,
> > > >
> > > > I'm a 3rd year university student with a C/C++ background and also a
> > > > reasonable amount of knowledge in Perl and Java. I'm interested in
> > > working
> > > > on the "*Build a garbage collector for C/C++ programs on the top of
> > > Harmony"
> > > > project (harmony-gc-5). I would like to know your expectations
> > > regarding
> > > > this.
> > > >
> > > > I have read through the Markmail archives of the Harmony dev list, and
> > > also
> > > > the discussion at [1]. And, would like to know a bit more on this
> > > project.
> > > >
> > > > [1] http://www.perl6.org/perl6-internals/2007-10/msg00091.html
> > > >
> > > > Thanks,
> > > >
> > > > Senaka Fernando,
> > > > Dept. of Computer Science & Engineering,
> > > > University of Moratuwa,
> > > > Sri Lanka
> > > > *
> > > >
> > >
> > >
> > >
> > > --
> > > With best regards,
> > > Alexei
> > >
> >
>
>
>
> --
> With best regards,
> Alexei
>
--
With best regards,
Alexei
Re: GSOC 2008: harmony-gc-5
Posted by Senaka Fernando <se...@gmail.com>.
Hi Xaio-Feng,
Ok, I got it!
You meant the mark-sweep within the gc_gen.
Regards,
Senaka
On Sat, Mar 29, 2008 at 10:19 PM, Senaka Fernando <se...@gmail.com>
wrote:
> Hi Xaio-Feng,
>
> I was reading into gc_gen. Actually it seems that you are referring to an
> archived gc, I believe you meant gc_v4 here, isn't it?
>
> Alexei,
>
> sorry I mistook the name.
>
> Regards,
> Senaka
>
>
> On Sat, Mar 29, 2008 at 10:17 PM, Senaka Fernando <se...@gmail.com>
> wrote:
>
> > Hi Alexei,
> >
> > I was reading into gc_gen. Actually it seems that you are referring to
> > an archived gc, I believe you meant gc_v4 here, isn't it?
> >
> > Regards,
> > Senaka
> >
> >
> > On Sat, Mar 29, 2008 at 7:48 PM, Xiao-Feng Li <xi...@gmail.com>
> > wrote:
> >
> > > On Fri, Mar 28, 2008 at 7:16 PM, Senaka Fernando <se...@gmail.com>
> > > wrote:
> > > > Hi Alexei,
> > > >
> > > > Thanks.
> > > >
> > > > Regards,
> > > > Senaka
> > > >
> > >
> > > Hi, Senaka, I am catching up the emails. The discussions below were
> > > interesting. You can take the mark-sweep GC of Harmony as the starting
> > > point. It's a parallel GC, and can optional compact the heap under
> > > serious heap fragmentation. You are encouraged to apply for the
> > > project. There could be multiple applicants though...
> > >
> > > Thanks,
> > > xiaofeng
> > >
> > > > On Fri, Mar 28, 2008 at 3:24 PM, Alexei Fedotov <
> > > alexei.fedotov@gmail.com>
> > > >
> > > >
> > > > wrote:
> > > >
> > > > > Senaka,
> > > > > Thanks for your enthusiasm and good luck.
> > > > >
> > > > > It turns out that Xiao Feng is silent due to his vacations. I've
> > > asked
> > > > > a guy who works with him to remind him about official mentor
> > > > > registration. Hope he either is already registered or will do it
> > > soon.
> > > > >
> > > > > Thanks.
> > > > >
> > > > > On Fri, Mar 28, 2008 at 10:39 AM, Senaka Fernando <
> > > senakafdo@gmail.com>
> > > > > wrote:
> > > > > > Hi Alexei,
> > > > > >
> > > > > >
> > > > > > On Fri, Mar 28, 2008 at 3:15 AM, Alexei Fedotov <
> > > > > alexei.fedotov@gmail.com>
> > > > > > wrote:
> > > > > >
> > > > > >
> > > > > > > Parrot community have a pretty interesting and resourceful
> > > test base
> > > > > > > including tests which run regular expressions against their
> > > code
> > > > > which
> > > > > > > fail when the code style is not good. The only stress test
> > > they have
> > > > > > > is fortunately a test against GC [1], so it may be a good
> > > start.
> > > > > > > Generally this would be a good idea to address these
> > > questions to
> > > > > > > their list and ask them for cross-mentoring. Building good
> > > relations
> > > > > > > and understanding their code of conduct would ease
> > > acceptance of your
> > > > > > > work later.
> > > > > >
> > > > > >
> > > > > > +1, for the thought. I will start this discussion on their
> > > list, too.
> > > > > >
> > > > > >
> > > > > >
> > > > > > >
> > > > > > > As for the porting layer, Maria tried merging Harmony and
> > > Parrot
> > > > > > > porting layers and faced difficulties adjusting our hythread
> > > layer
> > > > > > > based on port layer based on apr layer based on OS layer to
> > > parrot
> > > > > >
> > > > > >
> > > > > > I'm familiar with apr source so I can use it as a base from
> > > which i
> > > > > > investigate the port layer. I believe that a ground-up
> > > approach could
> > > > > rather
> > > > > > be appealing.
> > > > > >
> > > > > >
> > > > > >
> > > > > > >
> > > > > > > based on source configure-like preprocessing. Another
> > > challenge is a
> > > > > > > pure C nature of Parrot code which makes embedding our
> > > sources
> > > > > tainted
> > > > > > > with C++ painful. For me it seems feasible to build GC into
> > > a
> > > > > separate
> > > > > >
> > > > > >
> > > > > > There is the possibility of Class Loading to solve this issue.
> > > This
> > > > > requires
> > > > > > defining an exportable C interface so that Parrot wouldn't
> > > need to
> > > > > bother
> > > > > > about the Harmony source.
> > > > > >
> > > > > >
> > > > > >
> > > > > > >
> > > > > > > dynamic library using Harmony build system, and plug it into
> > > Parrot
> > > > > > > using a binary DLL interface you have to tune.
> > > > > >
> > > > > >
> > > > > > I'm interested in taking this project. This sounds very
> > > interesting.
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > > >
> > > > > > >
> > > > > > > [1] parrot/t/stress/gc.t
> > > > > > >
> > > > > > > On Thu, Mar 27, 2008 at 11:21 PM, Senaka Fernando <
> > > > > senakafdo@gmail.com>
> > > > > > > wrote:
> > > > > > > > Hi Alexei,
> > > > > > > >
> > > > > > > > On Fri, Mar 28, 2008 at 1:17 AM, Alexei Fedotov <
> > > > > > > alexei.fedotov@gmail.com>
> > > > > > > > wrote:
> > > > > > > >
> > > > > > > > > Hello Senaka,
> > > > > > > >
> > > > > > > >
> > > > > > > > Thanks for the prompt reply.
> > > > > > > >
> > > > > > > >
> > > > > > > > >
> > > > > > > > > Welcome to the community. If I would set expectations
> > > for
> > > > > > > > > harmony-gc-5, I would suggest that Parrot VM test base
> > > passes on
> > > > > > > > > Parrot with XFL garbage collector plugged in.
> > > > > > > >
> > > > > > > >
> > > > > > > > Since there is a test base I believe I that it would be
> > > much
> > > > > easier to
> > > > > > > track
> > > > > > > > the flow of my work and understand the expectation. Do
> > > you believe
> > > > > that
> > > > > > > the
> > > > > > > > Parrot VM test base would cover all the necessary
> > > requirements so
> > > > > that
> > > > > > > I can
> > > > > > > > take a look of what is expected?
> > > > > > > >
> > > > > > > > Also, I would like to know whether there are any JIRA
> > > issues, test
> > > > > > > branches,
> > > > > > > > etc. or any similar initiatives that you've taken
> > > regarding this
> > > > > > > feature.
> > > > > > > >
> > > > > > > >
> > > > > > > >
> > > > > > > > > This includes subtasks
> > > > > > > > > such as unplugging Harmony GC from DRLVM, adjusting GC
> > > interface
> > > > > and
> > > > > > > > > code to work with object layout coded in Parrot PMCs*
> > > instead of
> > > > > > > > > layouts accessed via java object virtual tables and
> > > resolving
> > > > > porting
> > > > > > > > > layer and linking conflicts.
> > > > > > > >
> > > > > > > >
> > > > > > > > I can rather target these tasks as objectives. Btw, what
> > > typically
> > > > > > > > constitutes the porting layer?
> > > > > > > >
> > > > > > > >
> > > > > > > >
> > > > > > > > >
> > > > > > > > >
> > > > > > > > > Thank you for your interest!
> > > > > > > > >
> > > > > > > > > * Which are very different from Apache PMCs.
> > > > > > > >
> > > > > > > >
> > > > > > > > :)
> > > > > > > >
> > > > > > > > Regards,
> > > > > > > > Senaka
> > > > > > > >
> > > > > > > >
> > > > > > > >
> > > > > > > >
> > > > > > > > >
> > > > > > > > > On Thu, Mar 27, 2008 at 9:55 PM, Senaka Fernando <
> > > > > senakafdo@gmail.com
> > > > > > > >
> > > > > > > > > wrote:
> > > > > > > > > > Hi Xiaofeng,
> > > > > > > > > >
> > > > > > > > > > I'm a 3rd year university student with a C/C++
> > > background and
> > > > > also
> > > > > > > a
> > > > > > > > > > reasonable amount of knowledge in Perl and Java. I'm
> > > > > interested in
> > > > > > > > > working
> > > > > > > > > > on the "*Build a garbage collector for C/C++
> > > programs on the
> > > > > top
> > > > > > > of
> > > > > > > > > Harmony"
> > > > > > > > > > project (harmony-gc-5). I would like to know your
> > > > > expectations
> > > > > > > > > regarding
> > > > > > > > > > this.
> > > > > > > > > >
> > > > > > > > > > I have read through the Markmail archives of the
> > > Harmony dev
> > > > > list,
> > > > > > > and
> > > > > > > > > also
> > > > > > > > > > the discussion at [1]. And, would like to know a bit
> > > more on
> > > > > this
> > > > > > > > > project.
> > > > > > > > > >
> > > > > > > > > > [1]
> > > > > http://www.perl6.org/perl6-internals/2007-10/msg00091.html
> > > > > > > > > >
> > > > > > > > > > Thanks,
> > > > > > > > > >
> > > > > > > > > > Senaka Fernando,
> > > > > > > > > > Dept. of Computer Science & Engineering,
> > > > > > > > > > University of Moratuwa,
> > > > > > > > > > Sri Lanka
> > > > > > > > > > *
> > > > > > > > > >
> > > > > > > > >
> > > > > > > > >
> > > > > > > > >
> > > > > > > > > --
> > > > > > > > > With best regards,
> > > > > > > > > Alexei
> > > > > > > > >
> > > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > --
> > > > > > > With best regards,
> > > > > > > Alexei
> > > > > > >
> > > > > >
> > > > >
> > > > >
> > > > >
> > > > > --
> > > > > With best regards,
> > > > > Alexei
> > > > >
> > > >
> > >
> > >
> > >
> > > --
> > > http://xiao-feng.blogspot.com
> > >
> >
> >
>
Re: GSOC 2008: harmony-gc-5
Posted by Senaka Fernando <se...@gmail.com>.
Hi Xaio-Feng,
I was reading into gc_gen. Actually it seems that you are referring to an
archived gc, I believe you meant gc_v4 here, isn't it?
Alexei,
sorry I mistook the name.
Regards,
Senaka
On Sat, Mar 29, 2008 at 10:17 PM, Senaka Fernando <se...@gmail.com>
wrote:
> Hi Alexei,
>
> I was reading into gc_gen. Actually it seems that you are referring to an
> archived gc, I believe you meant gc_v4 here, isn't it?
>
> Regards,
> Senaka
>
>
> On Sat, Mar 29, 2008 at 7:48 PM, Xiao-Feng Li <xi...@gmail.com>
> wrote:
>
> > On Fri, Mar 28, 2008 at 7:16 PM, Senaka Fernando <se...@gmail.com>
> > wrote:
> > > Hi Alexei,
> > >
> > > Thanks.
> > >
> > > Regards,
> > > Senaka
> > >
> >
> > Hi, Senaka, I am catching up the emails. The discussions below were
> > interesting. You can take the mark-sweep GC of Harmony as the starting
> > point. It's a parallel GC, and can optional compact the heap under
> > serious heap fragmentation. You are encouraged to apply for the
> > project. There could be multiple applicants though...
> >
> > Thanks,
> > xiaofeng
> >
> > > On Fri, Mar 28, 2008 at 3:24 PM, Alexei Fedotov <
> > alexei.fedotov@gmail.com>
> > >
> > >
> > > wrote:
> > >
> > > > Senaka,
> > > > Thanks for your enthusiasm and good luck.
> > > >
> > > > It turns out that Xiao Feng is silent due to his vacations. I've
> > asked
> > > > a guy who works with him to remind him about official mentor
> > > > registration. Hope he either is already registered or will do it
> > soon.
> > > >
> > > > Thanks.
> > > >
> > > > On Fri, Mar 28, 2008 at 10:39 AM, Senaka Fernando <
> > senakafdo@gmail.com>
> > > > wrote:
> > > > > Hi Alexei,
> > > > >
> > > > >
> > > > > On Fri, Mar 28, 2008 at 3:15 AM, Alexei Fedotov <
> > > > alexei.fedotov@gmail.com>
> > > > > wrote:
> > > > >
> > > > >
> > > > > > Parrot community have a pretty interesting and resourceful
> > test base
> > > > > > including tests which run regular expressions against their
> > code
> > > > which
> > > > > > fail when the code style is not good. The only stress test
> > they have
> > > > > > is fortunately a test against GC [1], so it may be a good
> > start.
> > > > > > Generally this would be a good idea to address these questions
> > to
> > > > > > their list and ask them for cross-mentoring. Building good
> > relations
> > > > > > and understanding their code of conduct would ease acceptance
> > of your
> > > > > > work later.
> > > > >
> > > > >
> > > > > +1, for the thought. I will start this discussion on their list,
> > too.
> > > > >
> > > > >
> > > > >
> > > > > >
> > > > > > As for the porting layer, Maria tried merging Harmony and
> > Parrot
> > > > > > porting layers and faced difficulties adjusting our hythread
> > layer
> > > > > > based on port layer based on apr layer based on OS layer to
> > parrot
> > > > >
> > > > >
> > > > > I'm familiar with apr source so I can use it as a base from
> > which i
> > > > > investigate the port layer. I believe that a ground-up approach
> > could
> > > > rather
> > > > > be appealing.
> > > > >
> > > > >
> > > > >
> > > > > >
> > > > > > based on source configure-like preprocessing. Another
> > challenge is a
> > > > > > pure C nature of Parrot code which makes embedding our sources
> > > > tainted
> > > > > > with C++ painful. For me it seems feasible to build GC into a
> > > > separate
> > > > >
> > > > >
> > > > > There is the possibility of Class Loading to solve this issue.
> > This
> > > > requires
> > > > > defining an exportable C interface so that Parrot wouldn't need
> > to
> > > > bother
> > > > > about the Harmony source.
> > > > >
> > > > >
> > > > >
> > > > > >
> > > > > > dynamic library using Harmony build system, and plug it into
> > Parrot
> > > > > > using a binary DLL interface you have to tune.
> > > > >
> > > > >
> > > > > I'm interested in taking this project. This sounds very
> > interesting.
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > >
> > > > > >
> > > > > > [1] parrot/t/stress/gc.t
> > > > > >
> > > > > > On Thu, Mar 27, 2008 at 11:21 PM, Senaka Fernando <
> > > > senakafdo@gmail.com>
> > > > > > wrote:
> > > > > > > Hi Alexei,
> > > > > > >
> > > > > > > On Fri, Mar 28, 2008 at 1:17 AM, Alexei Fedotov <
> > > > > > alexei.fedotov@gmail.com>
> > > > > > > wrote:
> > > > > > >
> > > > > > > > Hello Senaka,
> > > > > > >
> > > > > > >
> > > > > > > Thanks for the prompt reply.
> > > > > > >
> > > > > > >
> > > > > > > >
> > > > > > > > Welcome to the community. If I would set expectations for
> > > > > > > > harmony-gc-5, I would suggest that Parrot VM test base
> > passes on
> > > > > > > > Parrot with XFL garbage collector plugged in.
> > > > > > >
> > > > > > >
> > > > > > > Since there is a test base I believe I that it would be
> > much
> > > > easier to
> > > > > > track
> > > > > > > the flow of my work and understand the expectation. Do you
> > believe
> > > > that
> > > > > > the
> > > > > > > Parrot VM test base would cover all the necessary
> > requirements so
> > > > that
> > > > > > I can
> > > > > > > take a look of what is expected?
> > > > > > >
> > > > > > > Also, I would like to know whether there are any JIRA
> > issues, test
> > > > > > branches,
> > > > > > > etc. or any similar initiatives that you've taken regarding
> > this
> > > > > > feature.
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > > This includes subtasks
> > > > > > > > such as unplugging Harmony GC from DRLVM, adjusting GC
> > interface
> > > > and
> > > > > > > > code to work with object layout coded in Parrot PMCs*
> > instead of
> > > > > > > > layouts accessed via java object virtual tables and
> > resolving
> > > > porting
> > > > > > > > layer and linking conflicts.
> > > > > > >
> > > > > > >
> > > > > > > I can rather target these tasks as objectives. Btw, what
> > typically
> > > > > > > constitutes the porting layer?
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > >
> > > > > > > >
> > > > > > > > Thank you for your interest!
> > > > > > > >
> > > > > > > > * Which are very different from Apache PMCs.
> > > > > > >
> > > > > > >
> > > > > > > :)
> > > > > > >
> > > > > > > Regards,
> > > > > > > Senaka
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > >
> > > > > > > > On Thu, Mar 27, 2008 at 9:55 PM, Senaka Fernando <
> > > > senakafdo@gmail.com
> > > > > > >
> > > > > > > > wrote:
> > > > > > > > > Hi Xiaofeng,
> > > > > > > > >
> > > > > > > > > I'm a 3rd year university student with a C/C++
> > background and
> > > > also
> > > > > > a
> > > > > > > > > reasonable amount of knowledge in Perl and Java. I'm
> > > > interested in
> > > > > > > > working
> > > > > > > > > on the "*Build a garbage collector for C/C++ programs
> > on the
> > > > top
> > > > > > of
> > > > > > > > Harmony"
> > > > > > > > > project (harmony-gc-5). I would like to know your
> > > > expectations
> > > > > > > > regarding
> > > > > > > > > this.
> > > > > > > > >
> > > > > > > > > I have read through the Markmail archives of the
> > Harmony dev
> > > > list,
> > > > > > and
> > > > > > > > also
> > > > > > > > > the discussion at [1]. And, would like to know a bit
> > more on
> > > > this
> > > > > > > > project.
> > > > > > > > >
> > > > > > > > > [1]
> > > > http://www.perl6.org/perl6-internals/2007-10/msg00091.html
> > > > > > > > >
> > > > > > > > > Thanks,
> > > > > > > > >
> > > > > > > > > Senaka Fernando,
> > > > > > > > > Dept. of Computer Science & Engineering,
> > > > > > > > > University of Moratuwa,
> > > > > > > > > Sri Lanka
> > > > > > > > > *
> > > > > > > > >
> > > > > > > >
> > > > > > > >
> > > > > > > >
> > > > > > > > --
> > > > > > > > With best regards,
> > > > > > > > Alexei
> > > > > > > >
> > > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > > --
> > > > > > With best regards,
> > > > > > Alexei
> > > > > >
> > > > >
> > > >
> > > >
> > > >
> > > > --
> > > > With best regards,
> > > > Alexei
> > > >
> > >
> >
> >
> >
> > --
> > http://xiao-feng.blogspot.com
> >
>
>
Re: GSOC 2008: harmony-gc-5
Posted by Senaka Fernando <se...@gmail.com>.
Hi Alexei,
I was reading into gc_gen. Actually it seems that you are referring to an
archived gc, I believe you meant gc_v4 here, isn't it?
Regards,
Senaka
On Sat, Mar 29, 2008 at 7:48 PM, Xiao-Feng Li <xi...@gmail.com> wrote:
> On Fri, Mar 28, 2008 at 7:16 PM, Senaka Fernando <se...@gmail.com>
> wrote:
> > Hi Alexei,
> >
> > Thanks.
> >
> > Regards,
> > Senaka
> >
>
> Hi, Senaka, I am catching up the emails. The discussions below were
> interesting. You can take the mark-sweep GC of Harmony as the starting
> point. It's a parallel GC, and can optional compact the heap under
> serious heap fragmentation. You are encouraged to apply for the
> project. There could be multiple applicants though...
>
> Thanks,
> xiaofeng
>
> > On Fri, Mar 28, 2008 at 3:24 PM, Alexei Fedotov <
> alexei.fedotov@gmail.com>
> >
> >
> > wrote:
> >
> > > Senaka,
> > > Thanks for your enthusiasm and good luck.
> > >
> > > It turns out that Xiao Feng is silent due to his vacations. I've
> asked
> > > a guy who works with him to remind him about official mentor
> > > registration. Hope he either is already registered or will do it
> soon.
> > >
> > > Thanks.
> > >
> > > On Fri, Mar 28, 2008 at 10:39 AM, Senaka Fernando <
> senakafdo@gmail.com>
> > > wrote:
> > > > Hi Alexei,
> > > >
> > > >
> > > > On Fri, Mar 28, 2008 at 3:15 AM, Alexei Fedotov <
> > > alexei.fedotov@gmail.com>
> > > > wrote:
> > > >
> > > >
> > > > > Parrot community have a pretty interesting and resourceful test
> base
> > > > > including tests which run regular expressions against their code
> > > which
> > > > > fail when the code style is not good. The only stress test they
> have
> > > > > is fortunately a test against GC [1], so it may be a good start.
> > > > > Generally this would be a good idea to address these questions
> to
> > > > > their list and ask them for cross-mentoring. Building good
> relations
> > > > > and understanding their code of conduct would ease acceptance of
> your
> > > > > work later.
> > > >
> > > >
> > > > +1, for the thought. I will start this discussion on their list,
> too.
> > > >
> > > >
> > > >
> > > > >
> > > > > As for the porting layer, Maria tried merging Harmony and Parrot
> > > > > porting layers and faced difficulties adjusting our hythread
> layer
> > > > > based on port layer based on apr layer based on OS layer to
> parrot
> > > >
> > > >
> > > > I'm familiar with apr source so I can use it as a base from which
> i
> > > > investigate the port layer. I believe that a ground-up approach
> could
> > > rather
> > > > be appealing.
> > > >
> > > >
> > > >
> > > > >
> > > > > based on source configure-like preprocessing. Another challenge
> is a
> > > > > pure C nature of Parrot code which makes embedding our sources
> > > tainted
> > > > > with C++ painful. For me it seems feasible to build GC into a
> > > separate
> > > >
> > > >
> > > > There is the possibility of Class Loading to solve this issue.
> This
> > > requires
> > > > defining an exportable C interface so that Parrot wouldn't need to
> > > bother
> > > > about the Harmony source.
> > > >
> > > >
> > > >
> > > > >
> > > > > dynamic library using Harmony build system, and plug it into
> Parrot
> > > > > using a binary DLL interface you have to tune.
> > > >
> > > >
> > > > I'm interested in taking this project. This sounds very
> interesting.
> > > >
> > > >
> > > >
> > > >
> > > > >
> > > > >
> > > > > [1] parrot/t/stress/gc.t
> > > > >
> > > > > On Thu, Mar 27, 2008 at 11:21 PM, Senaka Fernando <
> > > senakafdo@gmail.com>
> > > > > wrote:
> > > > > > Hi Alexei,
> > > > > >
> > > > > > On Fri, Mar 28, 2008 at 1:17 AM, Alexei Fedotov <
> > > > > alexei.fedotov@gmail.com>
> > > > > > wrote:
> > > > > >
> > > > > > > Hello Senaka,
> > > > > >
> > > > > >
> > > > > > Thanks for the prompt reply.
> > > > > >
> > > > > >
> > > > > > >
> > > > > > > Welcome to the community. If I would set expectations for
> > > > > > > harmony-gc-5, I would suggest that Parrot VM test base
> passes on
> > > > > > > Parrot with XFL garbage collector plugged in.
> > > > > >
> > > > > >
> > > > > > Since there is a test base I believe I that it would be much
> > > easier to
> > > > > track
> > > > > > the flow of my work and understand the expectation. Do you
> believe
> > > that
> > > > > the
> > > > > > Parrot VM test base would cover all the necessary
> requirements so
> > > that
> > > > > I can
> > > > > > take a look of what is expected?
> > > > > >
> > > > > > Also, I would like to know whether there are any JIRA issues,
> test
> > > > > branches,
> > > > > > etc. or any similar initiatives that you've taken regarding
> this
> > > > > feature.
> > > > > >
> > > > > >
> > > > > >
> > > > > > > This includes subtasks
> > > > > > > such as unplugging Harmony GC from DRLVM, adjusting GC
> interface
> > > and
> > > > > > > code to work with object layout coded in Parrot PMCs*
> instead of
> > > > > > > layouts accessed via java object virtual tables and
> resolving
> > > porting
> > > > > > > layer and linking conflicts.
> > > > > >
> > > > > >
> > > > > > I can rather target these tasks as objectives. Btw, what
> typically
> > > > > > constitutes the porting layer?
> > > > > >
> > > > > >
> > > > > >
> > > > > > >
> > > > > > >
> > > > > > > Thank you for your interest!
> > > > > > >
> > > > > > > * Which are very different from Apache PMCs.
> > > > > >
> > > > > >
> > > > > > :)
> > > > > >
> > > > > > Regards,
> > > > > > Senaka
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > > >
> > > > > > > On Thu, Mar 27, 2008 at 9:55 PM, Senaka Fernando <
> > > senakafdo@gmail.com
> > > > > >
> > > > > > > wrote:
> > > > > > > > Hi Xiaofeng,
> > > > > > > >
> > > > > > > > I'm a 3rd year university student with a C/C++
> background and
> > > also
> > > > > a
> > > > > > > > reasonable amount of knowledge in Perl and Java. I'm
> > > interested in
> > > > > > > working
> > > > > > > > on the "*Build a garbage collector for C/C++ programs on
> the
> > > top
> > > > > of
> > > > > > > Harmony"
> > > > > > > > project (harmony-gc-5). I would like to know your
> > > expectations
> > > > > > > regarding
> > > > > > > > this.
> > > > > > > >
> > > > > > > > I have read through the Markmail archives of the Harmony
> dev
> > > list,
> > > > > and
> > > > > > > also
> > > > > > > > the discussion at [1]. And, would like to know a bit
> more on
> > > this
> > > > > > > project.
> > > > > > > >
> > > > > > > > [1]
> > > http://www.perl6.org/perl6-internals/2007-10/msg00091.html
> > > > > > > >
> > > > > > > > Thanks,
> > > > > > > >
> > > > > > > > Senaka Fernando,
> > > > > > > > Dept. of Computer Science & Engineering,
> > > > > > > > University of Moratuwa,
> > > > > > > > Sri Lanka
> > > > > > > > *
> > > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > --
> > > > > > > With best regards,
> > > > > > > Alexei
> > > > > > >
> > > > > >
> > > > >
> > > > >
> > > > >
> > > > > --
> > > > > With best regards,
> > > > > Alexei
> > > > >
> > > >
> > >
> > >
> > >
> > > --
> > > With best regards,
> > > Alexei
> > >
> >
>
>
>
> --
> http://xiao-feng.blogspot.com
>
Re: GSOC 2008: harmony-gc-5
Posted by Xiao-Feng Li <xi...@gmail.com>.
On Fri, Mar 28, 2008 at 7:16 PM, Senaka Fernando <se...@gmail.com> wrote:
> Hi Alexei,
>
> Thanks.
>
> Regards,
> Senaka
>
Hi, Senaka, I am catching up the emails. The discussions below were
interesting. You can take the mark-sweep GC of Harmony as the starting
point. It's a parallel GC, and can optional compact the heap under
serious heap fragmentation. You are encouraged to apply for the
project. There could be multiple applicants though...
Thanks,
xiaofeng
> On Fri, Mar 28, 2008 at 3:24 PM, Alexei Fedotov <al...@gmail.com>
>
>
> wrote:
>
> > Senaka,
> > Thanks for your enthusiasm and good luck.
> >
> > It turns out that Xiao Feng is silent due to his vacations. I've asked
> > a guy who works with him to remind him about official mentor
> > registration. Hope he either is already registered or will do it soon.
> >
> > Thanks.
> >
> > On Fri, Mar 28, 2008 at 10:39 AM, Senaka Fernando <se...@gmail.com>
> > wrote:
> > > Hi Alexei,
> > >
> > >
> > > On Fri, Mar 28, 2008 at 3:15 AM, Alexei Fedotov <
> > alexei.fedotov@gmail.com>
> > > wrote:
> > >
> > >
> > > > Parrot community have a pretty interesting and resourceful test base
> > > > including tests which run regular expressions against their code
> > which
> > > > fail when the code style is not good. The only stress test they have
> > > > is fortunately a test against GC [1], so it may be a good start.
> > > > Generally this would be a good idea to address these questions to
> > > > their list and ask them for cross-mentoring. Building good relations
> > > > and understanding their code of conduct would ease acceptance of your
> > > > work later.
> > >
> > >
> > > +1, for the thought. I will start this discussion on their list, too.
> > >
> > >
> > >
> > > >
> > > > As for the porting layer, Maria tried merging Harmony and Parrot
> > > > porting layers and faced difficulties adjusting our hythread layer
> > > > based on port layer based on apr layer based on OS layer to parrot
> > >
> > >
> > > I'm familiar with apr source so I can use it as a base from which i
> > > investigate the port layer. I believe that a ground-up approach could
> > rather
> > > be appealing.
> > >
> > >
> > >
> > > >
> > > > based on source configure-like preprocessing. Another challenge is a
> > > > pure C nature of Parrot code which makes embedding our sources
> > tainted
> > > > with C++ painful. For me it seems feasible to build GC into a
> > separate
> > >
> > >
> > > There is the possibility of Class Loading to solve this issue. This
> > requires
> > > defining an exportable C interface so that Parrot wouldn't need to
> > bother
> > > about the Harmony source.
> > >
> > >
> > >
> > > >
> > > > dynamic library using Harmony build system, and plug it into Parrot
> > > > using a binary DLL interface you have to tune.
> > >
> > >
> > > I'm interested in taking this project. This sounds very interesting.
> > >
> > >
> > >
> > >
> > > >
> > > >
> > > > [1] parrot/t/stress/gc.t
> > > >
> > > > On Thu, Mar 27, 2008 at 11:21 PM, Senaka Fernando <
> > senakafdo@gmail.com>
> > > > wrote:
> > > > > Hi Alexei,
> > > > >
> > > > > On Fri, Mar 28, 2008 at 1:17 AM, Alexei Fedotov <
> > > > alexei.fedotov@gmail.com>
> > > > > wrote:
> > > > >
> > > > > > Hello Senaka,
> > > > >
> > > > >
> > > > > Thanks for the prompt reply.
> > > > >
> > > > >
> > > > > >
> > > > > > Welcome to the community. If I would set expectations for
> > > > > > harmony-gc-5, I would suggest that Parrot VM test base passes on
> > > > > > Parrot with XFL garbage collector plugged in.
> > > > >
> > > > >
> > > > > Since there is a test base I believe I that it would be much
> > easier to
> > > > track
> > > > > the flow of my work and understand the expectation. Do you believe
> > that
> > > > the
> > > > > Parrot VM test base would cover all the necessary requirements so
> > that
> > > > I can
> > > > > take a look of what is expected?
> > > > >
> > > > > Also, I would like to know whether there are any JIRA issues, test
> > > > branches,
> > > > > etc. or any similar initiatives that you've taken regarding this
> > > > feature.
> > > > >
> > > > >
> > > > >
> > > > > > This includes subtasks
> > > > > > such as unplugging Harmony GC from DRLVM, adjusting GC interface
> > and
> > > > > > code to work with object layout coded in Parrot PMCs* instead of
> > > > > > layouts accessed via java object virtual tables and resolving
> > porting
> > > > > > layer and linking conflicts.
> > > > >
> > > > >
> > > > > I can rather target these tasks as objectives. Btw, what typically
> > > > > constitutes the porting layer?
> > > > >
> > > > >
> > > > >
> > > > > >
> > > > > >
> > > > > > Thank you for your interest!
> > > > > >
> > > > > > * Which are very different from Apache PMCs.
> > > > >
> > > > >
> > > > > :)
> > > > >
> > > > > Regards,
> > > > > Senaka
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > >
> > > > > > On Thu, Mar 27, 2008 at 9:55 PM, Senaka Fernando <
> > senakafdo@gmail.com
> > > > >
> > > > > > wrote:
> > > > > > > Hi Xiaofeng,
> > > > > > >
> > > > > > > I'm a 3rd year university student with a C/C++ background and
> > also
> > > > a
> > > > > > > reasonable amount of knowledge in Perl and Java. I'm
> > interested in
> > > > > > working
> > > > > > > on the "*Build a garbage collector for C/C++ programs on the
> > top
> > > > of
> > > > > > Harmony"
> > > > > > > project (harmony-gc-5). I would like to know your
> > expectations
> > > > > > regarding
> > > > > > > this.
> > > > > > >
> > > > > > > I have read through the Markmail archives of the Harmony dev
> > list,
> > > > and
> > > > > > also
> > > > > > > the discussion at [1]. And, would like to know a bit more on
> > this
> > > > > > project.
> > > > > > >
> > > > > > > [1]
> > http://www.perl6.org/perl6-internals/2007-10/msg00091.html
> > > > > > >
> > > > > > > Thanks,
> > > > > > >
> > > > > > > Senaka Fernando,
> > > > > > > Dept. of Computer Science & Engineering,
> > > > > > > University of Moratuwa,
> > > > > > > Sri Lanka
> > > > > > > *
> > > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > > --
> > > > > > With best regards,
> > > > > > Alexei
> > > > > >
> > > > >
> > > >
> > > >
> > > >
> > > > --
> > > > With best regards,
> > > > Alexei
> > > >
> > >
> >
> >
> >
> > --
> > With best regards,
> > Alexei
> >
>
--
http://xiao-feng.blogspot.com
Re: GSOC 2008: harmony-gc-5
Posted by Senaka Fernando <se...@gmail.com>.
Hi Alexei,
Thanks.
Regards,
Senaka
On Fri, Mar 28, 2008 at 3:24 PM, Alexei Fedotov <al...@gmail.com>
wrote:
> Senaka,
> Thanks for your enthusiasm and good luck.
>
> It turns out that Xiao Feng is silent due to his vacations. I've asked
> a guy who works with him to remind him about official mentor
> registration. Hope he either is already registered or will do it soon.
>
> Thanks.
>
> On Fri, Mar 28, 2008 at 10:39 AM, Senaka Fernando <se...@gmail.com>
> wrote:
> > Hi Alexei,
> >
> >
> > On Fri, Mar 28, 2008 at 3:15 AM, Alexei Fedotov <
> alexei.fedotov@gmail.com>
> > wrote:
> >
> >
> > > Parrot community have a pretty interesting and resourceful test base
> > > including tests which run regular expressions against their code
> which
> > > fail when the code style is not good. The only stress test they have
> > > is fortunately a test against GC [1], so it may be a good start.
> > > Generally this would be a good idea to address these questions to
> > > their list and ask them for cross-mentoring. Building good relations
> > > and understanding their code of conduct would ease acceptance of your
> > > work later.
> >
> >
> > +1, for the thought. I will start this discussion on their list, too.
> >
> >
> >
> > >
> > > As for the porting layer, Maria tried merging Harmony and Parrot
> > > porting layers and faced difficulties adjusting our hythread layer
> > > based on port layer based on apr layer based on OS layer to parrot
> >
> >
> > I'm familiar with apr source so I can use it as a base from which i
> > investigate the port layer. I believe that a ground-up approach could
> rather
> > be appealing.
> >
> >
> >
> > >
> > > based on source configure-like preprocessing. Another challenge is a
> > > pure C nature of Parrot code which makes embedding our sources
> tainted
> > > with C++ painful. For me it seems feasible to build GC into a
> separate
> >
> >
> > There is the possibility of Class Loading to solve this issue. This
> requires
> > defining an exportable C interface so that Parrot wouldn't need to
> bother
> > about the Harmony source.
> >
> >
> >
> > >
> > > dynamic library using Harmony build system, and plug it into Parrot
> > > using a binary DLL interface you have to tune.
> >
> >
> > I'm interested in taking this project. This sounds very interesting.
> >
> >
> >
> >
> > >
> > >
> > > [1] parrot/t/stress/gc.t
> > >
> > > On Thu, Mar 27, 2008 at 11:21 PM, Senaka Fernando <
> senakafdo@gmail.com>
> > > wrote:
> > > > Hi Alexei,
> > > >
> > > > On Fri, Mar 28, 2008 at 1:17 AM, Alexei Fedotov <
> > > alexei.fedotov@gmail.com>
> > > > wrote:
> > > >
> > > > > Hello Senaka,
> > > >
> > > >
> > > > Thanks for the prompt reply.
> > > >
> > > >
> > > > >
> > > > > Welcome to the community. If I would set expectations for
> > > > > harmony-gc-5, I would suggest that Parrot VM test base passes on
> > > > > Parrot with XFL garbage collector plugged in.
> > > >
> > > >
> > > > Since there is a test base I believe I that it would be much
> easier to
> > > track
> > > > the flow of my work and understand the expectation. Do you believe
> that
> > > the
> > > > Parrot VM test base would cover all the necessary requirements so
> that
> > > I can
> > > > take a look of what is expected?
> > > >
> > > > Also, I would like to know whether there are any JIRA issues, test
> > > branches,
> > > > etc. or any similar initiatives that you've taken regarding this
> > > feature.
> > > >
> > > >
> > > >
> > > > > This includes subtasks
> > > > > such as unplugging Harmony GC from DRLVM, adjusting GC interface
> and
> > > > > code to work with object layout coded in Parrot PMCs* instead of
> > > > > layouts accessed via java object virtual tables and resolving
> porting
> > > > > layer and linking conflicts.
> > > >
> > > >
> > > > I can rather target these tasks as objectives. Btw, what typically
> > > > constitutes the porting layer?
> > > >
> > > >
> > > >
> > > > >
> > > > >
> > > > > Thank you for your interest!
> > > > >
> > > > > * Which are very different from Apache PMCs.
> > > >
> > > >
> > > > :)
> > > >
> > > > Regards,
> > > > Senaka
> > > >
> > > >
> > > >
> > > >
> > > > >
> > > > > On Thu, Mar 27, 2008 at 9:55 PM, Senaka Fernando <
> senakafdo@gmail.com
> > > >
> > > > > wrote:
> > > > > > Hi Xiaofeng,
> > > > > >
> > > > > > I'm a 3rd year university student with a C/C++ background and
> also
> > > a
> > > > > > reasonable amount of knowledge in Perl and Java. I'm
> interested in
> > > > > working
> > > > > > on the "*Build a garbage collector for C/C++ programs on the
> top
> > > of
> > > > > Harmony"
> > > > > > project (harmony-gc-5). I would like to know your
> expectations
> > > > > regarding
> > > > > > this.
> > > > > >
> > > > > > I have read through the Markmail archives of the Harmony dev
> list,
> > > and
> > > > > also
> > > > > > the discussion at [1]. And, would like to know a bit more on
> this
> > > > > project.
> > > > > >
> > > > > > [1]
> http://www.perl6.org/perl6-internals/2007-10/msg00091.html
> > > > > >
> > > > > > Thanks,
> > > > > >
> > > > > > Senaka Fernando,
> > > > > > Dept. of Computer Science & Engineering,
> > > > > > University of Moratuwa,
> > > > > > Sri Lanka
> > > > > > *
> > > > > >
> > > > >
> > > > >
> > > > >
> > > > > --
> > > > > With best regards,
> > > > > Alexei
> > > > >
> > > >
> > >
> > >
> > >
> > > --
> > > With best regards,
> > > Alexei
> > >
> >
>
>
>
> --
> With best regards,
> Alexei
>
Re: GSOC 2008: harmony-gc-5
Posted by Alexei Fedotov <al...@gmail.com>.
Senaka,
Thanks for your enthusiasm and good luck.
It turns out that Xiao Feng is silent due to his vacations. I've asked
a guy who works with him to remind him about official mentor
registration. Hope he either is already registered or will do it soon.
Thanks.
On Fri, Mar 28, 2008 at 10:39 AM, Senaka Fernando <se...@gmail.com> wrote:
> Hi Alexei,
>
>
> On Fri, Mar 28, 2008 at 3:15 AM, Alexei Fedotov <al...@gmail.com>
> wrote:
>
>
> > Parrot community have a pretty interesting and resourceful test base
> > including tests which run regular expressions against their code which
> > fail when the code style is not good. The only stress test they have
> > is fortunately a test against GC [1], so it may be a good start.
> > Generally this would be a good idea to address these questions to
> > their list and ask them for cross-mentoring. Building good relations
> > and understanding their code of conduct would ease acceptance of your
> > work later.
>
>
> +1, for the thought. I will start this discussion on their list, too.
>
>
>
> >
> > As for the porting layer, Maria tried merging Harmony and Parrot
> > porting layers and faced difficulties adjusting our hythread layer
> > based on port layer based on apr layer based on OS layer to parrot
>
>
> I'm familiar with apr source so I can use it as a base from which i
> investigate the port layer. I believe that a ground-up approach could rather
> be appealing.
>
>
>
> >
> > based on source configure-like preprocessing. Another challenge is a
> > pure C nature of Parrot code which makes embedding our sources tainted
> > with C++ painful. For me it seems feasible to build GC into a separate
>
>
> There is the possibility of Class Loading to solve this issue. This requires
> defining an exportable C interface so that Parrot wouldn't need to bother
> about the Harmony source.
>
>
>
> >
> > dynamic library using Harmony build system, and plug it into Parrot
> > using a binary DLL interface you have to tune.
>
>
> I'm interested in taking this project. This sounds very interesting.
>
>
>
>
> >
> >
> > [1] parrot/t/stress/gc.t
> >
> > On Thu, Mar 27, 2008 at 11:21 PM, Senaka Fernando <se...@gmail.com>
> > wrote:
> > > Hi Alexei,
> > >
> > > On Fri, Mar 28, 2008 at 1:17 AM, Alexei Fedotov <
> > alexei.fedotov@gmail.com>
> > > wrote:
> > >
> > > > Hello Senaka,
> > >
> > >
> > > Thanks for the prompt reply.
> > >
> > >
> > > >
> > > > Welcome to the community. If I would set expectations for
> > > > harmony-gc-5, I would suggest that Parrot VM test base passes on
> > > > Parrot with XFL garbage collector plugged in.
> > >
> > >
> > > Since there is a test base I believe I that it would be much easier to
> > track
> > > the flow of my work and understand the expectation. Do you believe that
> > the
> > > Parrot VM test base would cover all the necessary requirements so that
> > I can
> > > take a look of what is expected?
> > >
> > > Also, I would like to know whether there are any JIRA issues, test
> > branches,
> > > etc. or any similar initiatives that you've taken regarding this
> > feature.
> > >
> > >
> > >
> > > > This includes subtasks
> > > > such as unplugging Harmony GC from DRLVM, adjusting GC interface and
> > > > code to work with object layout coded in Parrot PMCs* instead of
> > > > layouts accessed via java object virtual tables and resolving porting
> > > > layer and linking conflicts.
> > >
> > >
> > > I can rather target these tasks as objectives. Btw, what typically
> > > constitutes the porting layer?
> > >
> > >
> > >
> > > >
> > > >
> > > > Thank you for your interest!
> > > >
> > > > * Which are very different from Apache PMCs.
> > >
> > >
> > > :)
> > >
> > > Regards,
> > > Senaka
> > >
> > >
> > >
> > >
> > > >
> > > > On Thu, Mar 27, 2008 at 9:55 PM, Senaka Fernando <senakafdo@gmail.com
> > >
> > > > wrote:
> > > > > Hi Xiaofeng,
> > > > >
> > > > > I'm a 3rd year university student with a C/C++ background and also
> > a
> > > > > reasonable amount of knowledge in Perl and Java. I'm interested in
> > > > working
> > > > > on the "*Build a garbage collector for C/C++ programs on the top
> > of
> > > > Harmony"
> > > > > project (harmony-gc-5). I would like to know your expectations
> > > > regarding
> > > > > this.
> > > > >
> > > > > I have read through the Markmail archives of the Harmony dev list,
> > and
> > > > also
> > > > > the discussion at [1]. And, would like to know a bit more on this
> > > > project.
> > > > >
> > > > > [1] http://www.perl6.org/perl6-internals/2007-10/msg00091.html
> > > > >
> > > > > Thanks,
> > > > >
> > > > > Senaka Fernando,
> > > > > Dept. of Computer Science & Engineering,
> > > > > University of Moratuwa,
> > > > > Sri Lanka
> > > > > *
> > > > >
> > > >
> > > >
> > > >
> > > > --
> > > > With best regards,
> > > > Alexei
> > > >
> > >
> >
> >
> >
> > --
> > With best regards,
> > Alexei
> >
>
--
With best regards,
Alexei
Re: GSOC 2008: harmony-gc-5
Posted by Senaka Fernando <se...@gmail.com>.
Hi Alexei,
On Fri, Mar 28, 2008 at 3:15 AM, Alexei Fedotov <al...@gmail.com>
wrote:
> Parrot community have a pretty interesting and resourceful test base
> including tests which run regular expressions against their code which
> fail when the code style is not good. The only stress test they have
> is fortunately a test against GC [1], so it may be a good start.
> Generally this would be a good idea to address these questions to
> their list and ask them for cross-mentoring. Building good relations
> and understanding their code of conduct would ease acceptance of your
> work later.
+1, for the thought. I will start this discussion on their list, too.
>
> As for the porting layer, Maria tried merging Harmony and Parrot
> porting layers and faced difficulties adjusting our hythread layer
> based on port layer based on apr layer based on OS layer to parrot
I'm familiar with apr source so I can use it as a base from which i
investigate the port layer. I believe that a ground-up approach could rather
be appealing.
>
> based on source configure-like preprocessing. Another challenge is a
> pure C nature of Parrot code which makes embedding our sources tainted
> with C++ painful. For me it seems feasible to build GC into a separate
There is the possibility of Class Loading to solve this issue. This requires
defining an exportable C interface so that Parrot wouldn't need to bother
about the Harmony source.
>
> dynamic library using Harmony build system, and plug it into Parrot
> using a binary DLL interface you have to tune.
I'm interested in taking this project. This sounds very interesting.
>
>
> [1] parrot/t/stress/gc.t
>
> On Thu, Mar 27, 2008 at 11:21 PM, Senaka Fernando <se...@gmail.com>
> wrote:
> > Hi Alexei,
> >
> > On Fri, Mar 28, 2008 at 1:17 AM, Alexei Fedotov <
> alexei.fedotov@gmail.com>
> > wrote:
> >
> > > Hello Senaka,
> >
> >
> > Thanks for the prompt reply.
> >
> >
> > >
> > > Welcome to the community. If I would set expectations for
> > > harmony-gc-5, I would suggest that Parrot VM test base passes on
> > > Parrot with XFL garbage collector plugged in.
> >
> >
> > Since there is a test base I believe I that it would be much easier to
> track
> > the flow of my work and understand the expectation. Do you believe that
> the
> > Parrot VM test base would cover all the necessary requirements so that
> I can
> > take a look of what is expected?
> >
> > Also, I would like to know whether there are any JIRA issues, test
> branches,
> > etc. or any similar initiatives that you've taken regarding this
> feature.
> >
> >
> >
> > > This includes subtasks
> > > such as unplugging Harmony GC from DRLVM, adjusting GC interface and
> > > code to work with object layout coded in Parrot PMCs* instead of
> > > layouts accessed via java object virtual tables and resolving porting
> > > layer and linking conflicts.
> >
> >
> > I can rather target these tasks as objectives. Btw, what typically
> > constitutes the porting layer?
> >
> >
> >
> > >
> > >
> > > Thank you for your interest!
> > >
> > > * Which are very different from Apache PMCs.
> >
> >
> > :)
> >
> > Regards,
> > Senaka
> >
> >
> >
> >
> > >
> > > On Thu, Mar 27, 2008 at 9:55 PM, Senaka Fernando <senakafdo@gmail.com
> >
> > > wrote:
> > > > Hi Xiaofeng,
> > > >
> > > > I'm a 3rd year university student with a C/C++ background and also
> a
> > > > reasonable amount of knowledge in Perl and Java. I'm interested in
> > > working
> > > > on the "*Build a garbage collector for C/C++ programs on the top
> of
> > > Harmony"
> > > > project (harmony-gc-5). I would like to know your expectations
> > > regarding
> > > > this.
> > > >
> > > > I have read through the Markmail archives of the Harmony dev list,
> and
> > > also
> > > > the discussion at [1]. And, would like to know a bit more on this
> > > project.
> > > >
> > > > [1] http://www.perl6.org/perl6-internals/2007-10/msg00091.html
> > > >
> > > > Thanks,
> > > >
> > > > Senaka Fernando,
> > > > Dept. of Computer Science & Engineering,
> > > > University of Moratuwa,
> > > > Sri Lanka
> > > > *
> > > >
> > >
> > >
> > >
> > > --
> > > With best regards,
> > > Alexei
> > >
> >
>
>
>
> --
> With best regards,
> Alexei
>
Re: GSOC 2008: harmony-gc-5
Posted by Alexei Fedotov <al...@gmail.com>.
Parrot community have a pretty interesting and resourceful test base
including tests which run regular expressions against their code which
fail when the code style is not good. The only stress test they have
is fortunately a test against GC [1], so it may be a good start.
Generally this would be a good idea to address these questions to
their list and ask them for cross-mentoring. Building good relations
and understanding their code of conduct would ease acceptance of your
work later.
As for the porting layer, Maria tried merging Harmony and Parrot
porting layers and faced difficulties adjusting our hythread layer
based on port layer based on apr layer based on OS layer to parrot
based on source configure-like preprocessing. Another challenge is a
pure C nature of Parrot code which makes embedding our sources tainted
with C++ painful. For me it seems feasible to build GC into a separate
dynamic library using Harmony build system, and plug it into Parrot
using a binary DLL interface you have to tune.
[1] parrot/t/stress/gc.t
On Thu, Mar 27, 2008 at 11:21 PM, Senaka Fernando <se...@gmail.com> wrote:
> Hi Alexei,
>
> On Fri, Mar 28, 2008 at 1:17 AM, Alexei Fedotov <al...@gmail.com>
> wrote:
>
> > Hello Senaka,
>
>
> Thanks for the prompt reply.
>
>
> >
> > Welcome to the community. If I would set expectations for
> > harmony-gc-5, I would suggest that Parrot VM test base passes on
> > Parrot with XFL garbage collector plugged in.
>
>
> Since there is a test base I believe I that it would be much easier to track
> the flow of my work and understand the expectation. Do you believe that the
> Parrot VM test base would cover all the necessary requirements so that I can
> take a look of what is expected?
>
> Also, I would like to know whether there are any JIRA issues, test branches,
> etc. or any similar initiatives that you've taken regarding this feature.
>
>
>
> > This includes subtasks
> > such as unplugging Harmony GC from DRLVM, adjusting GC interface and
> > code to work with object layout coded in Parrot PMCs* instead of
> > layouts accessed via java object virtual tables and resolving porting
> > layer and linking conflicts.
>
>
> I can rather target these tasks as objectives. Btw, what typically
> constitutes the porting layer?
>
>
>
> >
> >
> > Thank you for your interest!
> >
> > * Which are very different from Apache PMCs.
>
>
> :)
>
> Regards,
> Senaka
>
>
>
>
> >
> > On Thu, Mar 27, 2008 at 9:55 PM, Senaka Fernando <se...@gmail.com>
> > wrote:
> > > Hi Xiaofeng,
> > >
> > > I'm a 3rd year university student with a C/C++ background and also a
> > > reasonable amount of knowledge in Perl and Java. I'm interested in
> > working
> > > on the "*Build a garbage collector for C/C++ programs on the top of
> > Harmony"
> > > project (harmony-gc-5). I would like to know your expectations
> > regarding
> > > this.
> > >
> > > I have read through the Markmail archives of the Harmony dev list, and
> > also
> > > the discussion at [1]. And, would like to know a bit more on this
> > project.
> > >
> > > [1] http://www.perl6.org/perl6-internals/2007-10/msg00091.html
> > >
> > > Thanks,
> > >
> > > Senaka Fernando,
> > > Dept. of Computer Science & Engineering,
> > > University of Moratuwa,
> > > Sri Lanka
> > > *
> > >
> >
> >
> >
> > --
> > With best regards,
> > Alexei
> >
>
--
With best regards,
Alexei
Re: GSOC 2008: harmony-gc-5
Posted by Senaka Fernando <se...@gmail.com>.
Hi Alexei,
On Fri, Mar 28, 2008 at 1:17 AM, Alexei Fedotov <al...@gmail.com>
wrote:
> Hello Senaka,
Thanks for the prompt reply.
>
> Welcome to the community. If I would set expectations for
> harmony-gc-5, I would suggest that Parrot VM test base passes on
> Parrot with XFL garbage collector plugged in.
Since there is a test base I believe I that it would be much easier to track
the flow of my work and understand the expectation. Do you believe that the
Parrot VM test base would cover all the necessary requirements so that I can
take a look of what is expected?
Also, I would like to know whether there are any JIRA issues, test branches,
etc. or any similar initiatives that you've taken regarding this feature.
> This includes subtasks
> such as unplugging Harmony GC from DRLVM, adjusting GC interface and
> code to work with object layout coded in Parrot PMCs* instead of
> layouts accessed via java object virtual tables and resolving porting
> layer and linking conflicts.
I can rather target these tasks as objectives. Btw, what typically
constitutes the porting layer?
>
>
> Thank you for your interest!
>
> * Which are very different from Apache PMCs.
:)
Regards,
Senaka
>
> On Thu, Mar 27, 2008 at 9:55 PM, Senaka Fernando <se...@gmail.com>
> wrote:
> > Hi Xiaofeng,
> >
> > I'm a 3rd year university student with a C/C++ background and also a
> > reasonable amount of knowledge in Perl and Java. I'm interested in
> working
> > on the "*Build a garbage collector for C/C++ programs on the top of
> Harmony"
> > project (harmony-gc-5). I would like to know your expectations
> regarding
> > this.
> >
> > I have read through the Markmail archives of the Harmony dev list, and
> also
> > the discussion at [1]. And, would like to know a bit more on this
> project.
> >
> > [1] http://www.perl6.org/perl6-internals/2007-10/msg00091.html
> >
> > Thanks,
> >
> > Senaka Fernando,
> > Dept. of Computer Science & Engineering,
> > University of Moratuwa,
> > Sri Lanka
> > *
> >
>
>
>
> --
> With best regards,
> Alexei
>
Re: GSOC 2008: harmony-gc-5
Posted by Alexei Fedotov <al...@gmail.com>.
Hello Senaka,
Welcome to the community. If I would set expectations for
harmony-gc-5, I would suggest that Parrot VM test base passes on
Parrot with XFL garbage collector plugged in. This includes subtasks
such as unplugging Harmony GC from DRLVM, adjusting GC interface and
code to work with object layout coded in Parrot PMCs* instead of
layouts accessed via java object virtual tables and resolving porting
layer and linking conflicts.
Thank you for your interest!
* Which are very different from Apache PMCs.
On Thu, Mar 27, 2008 at 9:55 PM, Senaka Fernando <se...@gmail.com> wrote:
> Hi Xiaofeng,
>
> I'm a 3rd year university student with a C/C++ background and also a
> reasonable amount of knowledge in Perl and Java. I'm interested in working
> on the "*Build a garbage collector for C/C++ programs on the top of Harmony"
> project (harmony-gc-5). I would like to know your expectations regarding
> this.
>
> I have read through the Markmail archives of the Harmony dev list, and also
> the discussion at [1]. And, would like to know a bit more on this project.
>
> [1] http://www.perl6.org/perl6-internals/2007-10/msg00091.html
>
> Thanks,
>
> Senaka Fernando,
> Dept. of Computer Science & Engineering,
> University of Moratuwa,
> Sri Lanka
> *
>
--
With best regards,
Alexei