[racket] Efficiency of tight loops in Racket

With futures you have to be careful; it is easy to write code that
doesn't end up actually being parallel. Did you try the examples from
the docs?

Robby

On Mon, Jan 17, 2011 at 1:27 PM, Jos Koot <jos.koot at telefonica.net> wrote:
> I did try futures, but did not observe two processors being used
> simultaneously.
> Jos
>
>> -----Original Message-----
>> From: robby.findler at gmail.com
>> [mailto:robby.findler at gmail.com] On Behalf Of Robby Findler
>> Sent: 17 January 2011 20:22
>> To: Jos Koot
>> Cc: Noel Welsh; users at racket-lang.org
>> Subject: Re: [racket] Efficiency of tight loops in Racket
>>
>> Oh, yes. DrRacket does not try to use two processors for
>> anything (unless your program uses futures or places, of course).
>>
>> Robby
>>
>> On Mon, Jan 17, 2011 at 10:25 AM, Jos Koot
>> <jos.koot at telefonica.net> wrote:
>> > Thanks for your reply.
>> > What I am observing is that when running DrScheme without any other
>> > apps running, only one processor is used at a time,
>> although control
>> > often swichtes bnetween the two processors. I also observe that
>> > windows 7 aborts DrScheme when more than 2Gbyte of memory is being
>> > used. I have set the memory limit of DrScheme to infite and for
>> > windows to about 5 Gbyte. Under windows xp virtual memory
>> did function
>> > well, but that was with 1 Gbyte of memory and trashing made it
>> > impossible to go up to 2 Gbyte. Now I have two cores of 2
>> Gbyte, but can't put my machine to thrash on page swapping.
>> > Jos
>> >
>> >> -----Original Message-----
>> >> From: robby.findler at gmail.com
>> >> [mailto:robby.findler at gmail.com] On Behalf Of Robby Findler
>> >> Sent: 17 January 2011 16:14
>> >> To: Noel Welsh
>> >> Cc: Jos Koot; users at racket-lang.org
>> >> Subject: Re: [racket] Efficiency of tight loops in Racket
>> >>
>> >> I think the real reason is actually much sadder: no one on
>> the core
>> >> team regularly uses windows. Well, until about a month ago, when I
>> >> started using windows for my development tasks so
>> hopefully that'll
>> >> change.
>> >>
>> >> But I'm not sure what Jos is observing and I was expecting a reply
>> >> from Kevin or Matthew on this -- places are still pretty
>> >> experimental.
>> >>
>> >> Robby
>> >>
>> >> On Mon, Jan 17, 2011 at 8:58 AM, Noel Welsh <noelwelsh at gmail.com>
>> >> wrote:
>> >> > I've seen lots of recent commits dealing w/ Windows 7 / 64-bit
>> >> > support, so I expect it is simply time. Windows is not
>> as developer
>> >> > friendly as Unix so likely to receive new features last (as
>> >> a guess).
>> >> >
>> >> > N.
>> >> >
>> >> > On Sat, Jan 15, 2011 at 5:22 PM, Jos Koot
>> >> <jos.koot at telefonica.net> wrote:
>> >> >> Is there a specific reason why there is no parallel
>> >> support for place
>> >> >> on a dual core processor with Windows 7.
>> >> >> Thanks, Jos
>> >> > _________________________________________________
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>> >> >
>> >
>> >
>
>