parfeval blocks other parfeval?

Paolo Lolo

2016 3 29

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Hi to all! I need to run a function (it's name is read_channel) in a worker while other workers run other functions. I call parfeval for the function read_channel and, after that, I call parfeval with another function. My problem is that, until the first parfeval doesn't finish, the other parfeval don't start. How can I do? The functions don't need to be synchronized

Thank you all!

data = csvread('data.csv');
first  = parfeval(@read_channel,1);
if((strcmp(first.State, 'finished')==1)
   out = fetchOutputs(first);
   fprintf("output from first");
end
for m=1:2
   others(m) = parfeval(@analyze,1,data);
end

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Edric Ellis 2016-3-30

What size parallel pool are you opening? Your subsequent parfeval calls should definitely proceed if you have sufficient workers available.

Paolo Lolo 2016-3-30

编辑：Paolo Lolo 2016-3-30

在 MATLAB Online 中打开

Hi! Thank you for your response. I'm opening 4 workers. I disabled spmd and it works, but there is another way to do this? because, if it's possible, I need spmd instead of doing the last for loop but if I run the code it makes the same effect that I comment later.

data = csvread('data.csv');
first  = parfeval(@read_channel,1);
if((strcmp(first.State, 'finished')==1)
   out = fetchOutputs(first);
   fprintf("output from first");
end  
spmd(2)
  data_out = analyze(data);
end