Update parallel.rst #10277
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Update parallel.rst #10277
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It was very confusing to me how to pass messages back and forth between processes, so I thought a complete example
Corrected so mistakes and used the array returned from addprocs
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looks like this failed the whitespace test on CI |
Added white space to try to mimic the code in isready. When I preview the file though it just shows the top most outline, so I am unfortunately not sure how to make sure it will pass the built in whitespace test.
Changed @spawnat to use a variable instead of a hardcoded constant.
| end | ||
| @spawnat procList[1] f(rr) | ||
| put!(rr, 8) | ||
| @show( take!(rr) ) # => 64 |
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Though the chances of seeing a return value of 8 here is almost nil, julia does not guarantee that f will execute on the remote worker before the take! here.
Hence, a better example for message passing would be to have two remote refs, say r1 and r2. r1 is always written to from the local process and read from the remote process, while r2 is always written to at the remote process and read from the local.
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@simeonbassett do you have time to squash and rebase? Also, it would be great if you could address @amitmurthy's comment. |
tkelman
added
docs
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Old Doc PRs tend to be the most stale.....feel free to open additional issues/PRs around improvements on latest master. |
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It was very confusing to me how to pass messages back and forth between processes, so I thought a complete example would help quite a bit.