Hi All, Is tomorrow's meet confirmed? Anyone please post the details for the meet-venue and time if things have changed from this http://doodle.com/53iqx4gdu5fuzws7
Thanks, Devjyoti On Wed, Feb 9, 2011 at 4:30 PM, <bangpypers-requ...@python.org> wrote: > Send BangPypers mailing list submissions to > bangpypers@python.org > > To subscribe or unsubscribe via the World Wide Web, visit > http://mail.python.org/mailman/listinfo/bangpypers > or, via email, send a message with subject or body 'help' to > bangpypers-requ...@python.org > > You can reach the person managing the list at > bangpypers-ow...@python.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of BangPypers digest..." > > > Today's Topics: > > 1. Re: BangPypers meeting February 2011 (Baiju M) > 2. Re: Ideas for Python concurrency... (Dhananjay Nene) > 3. Re: Ideas for Python concurrency... (Vishal) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Tue, 8 Feb 2011 21:54:36 +0530 > From: Baiju M <baiju.m.m...@gmail.com> > To: Bangalore Python Users Group - India <bangpypers@python.org> > Subject: Re: [BangPypers] BangPypers meeting February 2011 > Message-ID: > <aanlktiny_rcha3peoabr--mfayseb_ncxsmzxusog...@mail.gmail.com> > Content-Type: text/plain; charset=ISO-8859-1 > > Hi All, > > Majority of the people are fine with Feb 12th (Saturday): > http://doodle.com/53iqx4gdu5fuzws7 > > So, we will have a regular meeting at 3 pm on that day. > If more people are interested we can have a sprint > otherwise we will go for normal discussions. > > Can anyone from ThoughtWorks confirm the venue > availability ? > > Regards, > Baiju M > > > ------------------------------ > > Message: 2 > Date: Wed, 9 Feb 2011 11:04:57 +0530 > From: Dhananjay Nene <dhananjay.n...@gmail.com> > To: Bangalore Python Users Group - India <bangpypers@python.org> > Subject: Re: [BangPypers] Ideas for Python concurrency... > Message-ID: > <aanlktike1xsfmtff-2u1gzcl4tgtzoere3z_sixfv...@mail.gmail.com> > Content-Type: text/plain; charset=ISO-8859-1 > > On Tue, Feb 8, 2011 at 2:15 PM, Vishal <vsapr...@gmail.com> wrote: > >> On Tue, Feb 8, 2011 at 2:10 PM, Baishampayan Ghose <b.gh...@gmail.com >> >wrote: >> >> > > Mutliprocessing means, data copying, talking to each other through >> PIPES, >> > > also it has its issues with running on Windows (all function calls >> should >> > be pickelable) >> > > >> > > Threads seems pretty stable on most platforms where Python runs. >> > >> > Threads won't help you much because of the Python GIL. >> > >> > Regards, >> > BG >> > >> > -- >> > Baishampayan Ghose >> > b.ghose at gmail.com >> > ' >> > >> >> The GIL is only limited to one interpreter. GIL comes into picture because >> Threads in python create a new interpreter context, so the same interpreter >> switches to new byte codes. The original idea was to create a new >> interpreter for each thread, each one with its own GIL !!!. All within the >> same process. >> > > Interesting. But that does raise some curious issues of sharing data across > interpreters. > So as per the original thought - would threads be able to access data across > multiple > interpreters (to implement shared data), or would they have completely > isolated > data islands via message passing ? > > Dhananjay > >> >> Vishal >> _______________________________________________ >> BangPypers mailing list >> BangPypers@python.org >> http://mail.python.org/mailman/listinfo/bangpypers >> > > > ------------------------------ > > Message: 3 > Date: Wed, 9 Feb 2011 14:16:24 +0530 > From: Vishal <vsapr...@gmail.com> > To: Bangalore Python Users Group - India <bangpypers@python.org> > Subject: Re: [BangPypers] Ideas for Python concurrency... > Message-ID: > <aanlktimd3okndfbus1s3dcnffmjvqoip-ku426ma6...@mail.gmail.com> > Content-Type: text/plain; charset=ISO-8859-1 > > On Wed, Feb 9, 2011 at 11:04 AM, Dhananjay Nene > <dhananjay.n...@gmail.com>wrote: > >> On Tue, Feb 8, 2011 at 2:15 PM, Vishal <vsapr...@gmail.com> wrote: >> >> > On Tue, Feb 8, 2011 at 2:10 PM, Baishampayan Ghose <b.gh...@gmail.com >> > >wrote: >> > >> > > > Mutliprocessing means, data copying, talking to each other through >> > PIPES, >> > > > also it has its issues with running on Windows (all function calls >> > should >> > > be pickelable) >> > > > >> > > > Threads seems pretty stable on most platforms where Python runs. >> > > >> > > Threads won't help you much because of the Python GIL. >> > > >> > > Regards, >> > > BG >> > > >> > > -- >> > > Baishampayan Ghose >> > > b.ghose at gmail.com >> > > ' >> > > >> > >> > The GIL is only limited to one interpreter. GIL comes into picture >> because >> > Threads in python create a new interpreter context, so the same >> interpreter >> > switches to new byte codes. The original idea was to create a new >> > interpreter for each thread, each one with its own GIL !!!. All within >> the >> > same process. >> > >> >> Interesting. But that does raise some curious issues of sharing data across >> interpreters. >> So as per the original thought - would threads be able to access data >> across >> multiple >> interpreters (to implement shared data), or would they have completely >> isolated >> data islands via message passing ? >> >> Dhananjay >> >> > I had forwarded the same question to comp.lang.python. here are the replies > till date: > http://groups.google.com/group/comp.lang.python/browse_thread/thread/dd3938282b64c6ac/4a9d53c02e30cc3b#4a9d53c02e30cc3b > > <http://groups.google.com/group/comp.lang.python/browse_thread/thread/dd3938282b64c6ac/4a9d53c02e30cc3b#4a9d53c02e30cc3b>People > have pointed out to the need of very fine grained locking that would be > necessary to make sure data sharing is sane, between the interpreters. > However, reference counting comes in the way of such a fine grained locking. > People have also pointed towards PyPy which does away with reference > counting. > > I like your comment about having an internal message passing scheme among > the interpreters, like what processor cores do, when they have to share data > through L2 caches. > > Best regards, > Vishal Sapre. > > > "May we do good and not evil. May we find forgiveness for ourself and > forgive others. May we share freely, never taking more than we give." > > > ------------------------------ > > _______________________________________________ > BangPypers mailing list > BangPypers@python.org > http://mail.python.org/mailman/listinfo/bangpypers > > > End of BangPypers Digest, Vol 42, Issue 21 > ****************************************** > _______________________________________________ BangPypers mailing list BangPypers@python.org http://mail.python.org/mailman/listinfo/bangpypers
