Good morning Jay and Steve, It is a personal project to understand the difference between Unicon and ObjectIcon. My reasons are related to the co-expression implementation differences and the fact that ObjectIcon is a no recursive interpreter (unlike Unicon). My original reason for looking at both is that I am looking at a reimplementation of the icon runtime as a indirect threaded form. I have been puzzling about this for many years but, it has only been in recent times that I have the extra time to look at these things.
My investigations should, at this point, have no bearing on what Jafar is doing. As far as I can tell, I am the only one looking at the implementation differences. As I am NOT a c programmer, I am also having to look at the implementation as a novice. I have always found c as being a hodge podge in terms of a language. But that is really neither here nor there. At this point, I can't give any real comment on either implementation with respect to threads, co-expressions and efficiency. regards Bruce Rennie On 30/04/16 02:37, Jay Hammond wrote: > Robert Parlett developed Objecticon. > > https://rosettacode.org/wiki/Category:ObjectIcon > > and > > http://objecticon.sourceforge.net/ > > say a bit about it. > > From a long time ago maybe 8 years, I seem to remember there being > discussion in this group about a different co-expression implementation > in Objecticon being more efficient at threads, co-expressions than the > then Unicon one. > > There was of course also a downside to that approach. There always are > compromises. > > If it's not too much of a distraction, would Bruce and or Jafar care > to comment on where > Unicon (and Objecticon) are now wrt threads, co-expressions, efficiency? > > jay > > On 29/04/2016 17:04, Steve Graham wrote: >> ObjectIcon? >> >> ------------------------------------------------------------------------ >> *From:* Bruce & Breeanna Rennie <bren...@dcsi.net.au> >> *To:* Jafar Al-Gharaibeh <to.ja...@gmail.com> >> *Cc:* Unicon group <unicon-group@lists.sourceforge.net> >> *Sent:* Thursday, April 28, 2016 8:35 PM >> *Subject:* Re: [Unicon-group] Soft thread changes >> >> Good afternoon Jafar, >> >> As I am able I'll have a look and see if I can add anything of worth for >> the implementation. The idea sounds good. At the moment I am still >> trying to wrap my head around the differences between Unicon and >> ObjectIcon implementation details. >> >> regards >> >> Bruce Rennie >> >> On 29/04/16 12:21, Jafar Al-Gharaibeh wrote: >> > Good Morning Bruce, >> > >> > Soft-threads ( software threads or maybe vs hard-threads) are a hybrid >> > between native co-expressions and threads made possible by my recent >> > changes to allow native coswitch() to coexist with concurrent threads. >> > They are similar to native co-expressions in that they are completely >> > a Unicon thing (no OS context, i.e can't be scheduled by the OS), but >> > they are similar to threads in that they are concurrent. Since a soft >> > thread doesn't have a pthread (OS context) it needs to be scheduled >> > "manually". Unlike co-expressions which get scheduled via an explicit >> > activation, soft threads are managed implicitly by the language's >> > runtime. That means we need a scheduler that takes care of this new >> > task with all of the problems that comes with it. :) >> > >> > The goal is allow us to create a lot of "cheap" concurrent threads >> > even without creating pthreads, or get by with a few pthreads through >> > thread pooling, etc. The idea is to decouple Unicon's threads from the >> > the OS threads. >> > >> > What I have committed so far under "SoftThread" ifdefs is very very >> > basic experimental implementation that I did in under two hours. I >> > got some basic scheduling to work and was able to run a small demo. We >> > have a long a long way to go. If anyone is interested in this or >> > helping with implementation I'd be very happy to share more details >> > with them. >> > >> > Cheers, >> > Jafar >> > >> > >> > >> > >> > On Thu, Apr 28, 2016 at 8:25 PM, Bruce & Breeanna Rennie >> > <bren...@dcsi.net.au <mailto:bren...@dcsi.net.au> >> <mailto:bren...@dcsi.net.au <mailto:bren...@dcsi.net.au>>> wrote: >> > >> > Good morning Jafar, >> > >> > Can you clue us into what the soft-thread changes are for, please? >> > >> > regards >> > >> > Bruce Rennie >> > >> >> Unicon-group mailing list >> Unicon-group@lists.sourceforge.net >> <mailto:Unicon-group@lists.sourceforge.net> >> https://lists.sourceforge.net/lists/listinfo/unicon-group >> >> > > > > ------------------------------------------------------------------------------ > Find and fix application performance issues faster with Applications Manager > Applications Manager provides deep performance insights into multiple tiers of > your business applications. It resolves application problems quickly and > reduces your MTTR. Get your free trial! > https://ad.doubleclick.net/ddm/clk/302982198;130105516;z > > > _______________________________________________ > Unicon-group mailing list > Unicon-group@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/unicon-group ------------------------------------------------------------------------------ Find and fix application performance issues faster with Applications Manager Applications Manager provides deep performance insights into multiple tiers of your business applications. It resolves application problems quickly and reduces your MTTR. Get your free trial! https://ad.doubleclick.net/ddm/clk/302982198;130105516;z _______________________________________________ Unicon-group mailing list Unicon-group@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/unicon-group
