[racket-dev] Multiple 'raco make' processes

Specifically, you can get errors like "Called export 72 and expected
set->list but got list->set. Chaos!"

Jay

On Tue, Dec 9, 2014 at 3:09 PM, Matthew Flatt <mflatt at cs.utah.edu> wrote:
> Unfortunately, the bytecode compiler is not completely deterministic.
> Generating the same ".zo" file from the same source is likely to
> produce different bytes each time. The root causes are various counters
> and hash orders, and I hope to fix that eventually. For now, since the
> generated bytecode is different, there can be inconsistencies instead
> of just duplicated work.
>
> At Tue, 9 Dec 2014 11:54:16 -0800, Dan Liebgold wrote:
>> If the multiple 'raco make's would produce the same results, then there
>> should be no inconsistency, just duplicate work, right?
>>
>> And my use case is a bit different... I need to spawn the multiple 'raco
>> makes', rather than have raco make spawn multiple racket instances (via the
>> -j flag). Although this particular setup will bear some examination.
>>
>> On Tue, Dec 9, 2014 at 11:47 AM, Robby Findler <robby at eecs.northwestern.edu>
>> wrote:
>>
>> > Ah sorry: meant to add: did you try the -j flag?
>> >
>> >
>> > On Tuesday, December 9, 2014, Robby Findler <robby at eecs.northwestern.edu>
>> > wrote:
>> >
>> >> I think they can stomp on each other and you can get inconsistent
>> >> results, theoretically.
>> >>
>> >> Robby
>> >>
>> >> On Tuesday, December 9, 2014, Dan Liebgold <dan.liebgold at gmail.com>
>> >> wrote:
>> >>
>> >>> If I have multiple instances of raco make running and some of the files
>> >>> they are checking/rebuilding are shared across the instances... what
>> >>> happens?  Does raco make have lock to ensure no contention? Or does each
>> >>> process potentially redo some work?
>> >>>
>> >>> --
>> >>> Dan Liebgold    [dan.liebgold at gmail.com]
>> >>>
>> >>
>>
>>
>> --
>> Dan Liebgold    [dan.liebgold at gmail.com]
>> _________________________
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-- 
Jay McCarthy
http://jeapostrophe.github.io

           "Wherefore, be not weary in well-doing,
      for ye are laying the foundation of a great work.
And out of small things proceedeth that which is great."
                          - D&C 64:33