Dual Parfor from different scripts
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So I have a Launcher.m script which executes a function.m using parfor. The function.m also has its own parfor. Will this work?
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Walter Roberson
2023년 2월 1일
편집: Walter Roberson
2023년 2월 2일
it will be accepted but will execute the second one in serial order
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Walter Roberson
2023년 2월 2일
The nested parfor will be executed in serial, in reverse order. It is not possible to initiate parallel constructs within parallel constructs and have the nested ones operate in parallel.
(Though I am not certain what would happen if you were to parfeval() or batch() within a parallel construct.)
Walter Roberson
2023년 2월 2일
Looks like parfeval() and parfor() cannot initiate parfeval() ...
p = parpool();
outer_results = parfevalOnAll(p, @test_outer, 0, p)
celldisp(outer_results.Error)
parfor K = 1 : p.NumWorkers
test_outer(p);
end
function test_outer(p)
ID = randi(99);
fprintf('outer about to start inner, ID = %d\n', ID);
inner_results = parfevalOnAll(p, @test_inner, 0, ID)
celldisp(inner_results.Error)
fprintf('outer fininished inners, ID = %d\n', ID);
end
function test_inner(ID)
subID = randi(99);
fprintf('inner ID %d subid %d reporting!\n', ID, subID);
end
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