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Re: auto-connect fails to parallelize independent processes

From: Ricardo Wurmus
Subject: Re: auto-connect fails to parallelize independent processes
Date: Fri, 10 Jun 2022 15:13:06 +0200
User-agent: mu4e 1.6.10; emacs 28.1

Olivier Dion via <> writes:

> We can see that both processes are completely independent, and yet they
> are batched linearly. […]

I haven’t been able to reproduce this yet.

I wrote this test and it passes:

(let* ((proc (lambda (output)
                (name "does-it-matter?")
                (outputs (file output))
                (procedure '()))))
       (p1 (proc "A.out"))
       (p2 (proc "B.out"))
       (wf (make-workflow
            (name "test-workflow")
             (auto-connect p1 p2)))))
  (test-equal "auto-connect parallelizes independent processes"
    (list (list p2 p1))
     (workflow-processes wf)
     (workflow-restrictions wf))))

The result of parallel-step-execution-order means that p2 and p1 both
belong to the first set of processes that can be executed
simultaneously.  (There is only one set of processes, so this list of p2
and p1 is the only entry in the list of steps.)

If the above is in fact an accurate transcription of your report, we
need to look at the users of workflow-run-order (which uses
parallel-step-execution-order) to locate the bug.


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