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Performance issue in DArray
creation when myid()
holds a chunk
#206
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raminammour
added a commit
to raminammour/DistributedArrays.jl
that referenced
this issue
Jun 6, 2019
Fixes issue JuliaParallel#206 , please see the issue description for an explanation of the fix.
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Hello,
If the
pid
trying to create aDArray
has to do enough work, we see a slow down. The work interferes with the asynchronous dispatch of work to the otherpids
.Note that in the last experiment, the same
pids
are included, but thepid==1
is last and the slowdown disappears (it dispatches the work to others before doing its own). Which suggests the easy fix:And after the fix:
Will submit a PR with the fix promptly :)
Cheers!
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