[racket-dev] Multiple 'raco make' processes

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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