MATLAB parallel loop with slight delays

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Re Kh
Re Kh 2016-12-8
回答： Edric Ellis 2016-12-9
I have a parallel loop in matlab shown below. Is there a way to make sure the loops are not running simultaneously but with a slight delay? I am open to use batch or spmd also but have limited knowledge of them and will appreciate any help. I am calling another program, myprogexe.exe, but this program needs to access a specific port on a pc and multiple requests cant go in. hence i need to make sure there is a very slight delay in requests. myprogexe.exe is a very computational heavy code itself (takes about 10 mins for each input to run)
parfor i=1:length(MinorRoots)
runmodels = MinorRoots{i};
cmd = ['$myprogexe -v 2014.2 ', runmodels];
[status, result] = system(cmd);
end

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回答（1 个）

Edric Ellis
Edric Ellis 2016-12-9
You could use spmd to do this, but note that the following approach isn't completely ideal because it adds additional synchronisation points.
spmd
origLimit = length(MinorRoots);
loopLimit = numlabs * ceil(origLimit/numlabs);
for i = labindex:numlabs:loopLimit
labBarrier; % synchronise all workers
if i <= origLimit
pause(labindex-1); % timing offset
... run your code ...
end
end
end

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