[Swift-user] Coordination between app calls in foreach loop

[Ketan Maheshwari]

I have filed this as Swift bug:

https://bugzilla.mcs.anl.gov/swift/show_bug.cgi?id=1099


On Fri, Sep 20, 2013 at 4:37 PM, Mihael Hategan <hategan at mcs.anl.gov> wrote:

> I can confirm this bug. Apps don't properly wait for arrays.
>
> Mihael
>
> On Fri, 2013-09-20 at 14:08 -0500, Ketan Maheshwari wrote:
> > Hi,
> >
> > I am working with APS user Hemant Sharma (in CC) on one of his projects.
> > Hemant wrote a Swift script which has about three foreach invocations
> which
> > he wants to run one after other.
> >
> > In order to achieve this coordination, Hemant is using an int[] in one
> loop
> > which is passed as input to the app call of another loop. He observes
> that
> > the coordination is not maintained and both app calls happen
> simultaneously
> > resulting in application error.
> >
> > Here is a quick reproduction I tried and I observe indeed that
> coordination
> > is not happening:
> >
> > $ cat dummy.swift
> > type file;
> >
> > app (file out) A (string in1){
> >   dummyA in1 stdout=@out;
> > }
> >
> > app (file out) B (string in1, int[] _art){
> >   dummyB in1 stdout=@out;
> > }
> >
> > file outfileA[]<simple_mapper; location="outdir",
> > prefix="a.",suffix=".out">;
> > file outfileB[]<simple_mapper; location="outdir",
> > prefix="b.",suffix=".out">;
> >
> > int art[];
> > foreach i in [0:3]{
> >  outfileA[i] = A ("astring");
> >  art[i]=i;
> >  }
> >
> > foreach j in [0:3]{
> >  outfileB[j] = B ("bstring", art);
> >  }
> >
> > Since the art array is wholly required in app B, one would expect the
> first
> > foreach to finish befor the call to B gets invoked. This is not happening
> > in my simple test where I ask the executable called by A to sleep for 5
> sec
> > and that called by B to print timestamp and quit.
> >
> > I see in the resulting files that the timestamps in B precede those in A.
> >
> > This looks like a bug to me. Swift is 0.94 swift-r7091 cog-r3789.
> >
> > Thanks,
> > Hi,
> >
> >
> > I am working with APS user Hemant Sharma (in CC) on one of his
> > projects. Hemant wrote a Swift script which has about three foreach
> > invocations which he wants to run one after other.
> >
> >
> > In order to achieve this coordination, Hemant is using an int[] in one
> > loop which is passed as input to the app call of another loop. He
> > observes that the coordination is not maintained and both app calls
> > happen simultaneously resulting in application error.
> >
> >
> > Here is a quick reproduction I tried and I observe indeed that
> > coordination is not happening:
> >
> > $ cat dummy.swift
> > type file;
> >
> > app (file out) A (string in1){
> >   dummyA in1 stdout=@out;
> > }
> >
> > app (file out) B (string in1, int[] _art){
> >   dummyB in1 stdout=@out;
> > }
> >
> > file outfileA[]<simple_mapper; location="outdir",
> > prefix="a.",suffix=".out">;
> > file outfileB[]<simple_mapper; location="outdir",
> > prefix="b.",suffix=".out">;
> >
> > int art[];
> > foreach i in [0:3]{
> >  outfileA[i] = A ("astring");
> >  art[i]=i;
> >  }
> >
> > foreach j in [0:3]{
> >  outfileB[j] = B ("bstring", art);
> >  }
> >
> >
> > Since the art array is wholly required in app B, one would expect the
> > first foreach to finish befor the call to B gets invoked. This is not
> > happening in my simple test where I ask the executable called by A to
> > sleep for 5 sec and that called by B to print timestamp and quit.
> >
> >
> > I see in the resulting files that the timestamps in B precede those in
> > A.
> >
> >
> > This looks like a bug to me. Swift is 0.94 swift-r7091 cog-r3789.
> >
> >
> >
> > Thanks,
> >
> > _______________________________________________
> > Swift-user mailing list
> > Swift-user at ci.uchicago.edu
> > https://lists.ci.uchicago.edu/cgi-bin/mailman/listinfo/swift-user
>
>
>


-- 
Ketan
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