在Matlab中使用parfor进行嵌套循环

问题描述

我想为每个block1并行化block2并并行化外循环.

I want to parallelize block2 for each block1 and parallerlize outer loop too.

先前的代码:

    for i=rangei
        <block1>
        for j=rangej
            <block2> dependent on <block1>
        end
    end

更改代码:

    parfor i=rangei
        <block1>
        parfor j=rangej
            <block2> dependent on <block1>
        end
    end

这样可以获得多少效率，更改后的代码将做正确的事情吗?更改后的代码是否符合我的要求?

how much efficient can this get and will the changed code do the right thing?Is the changed code valid for my requirements?

推荐答案

在MATLAB中，parfor无法嵌套.这意味着，在您的代码中，您应该用for(最有可能是外部循环)替换一个parfor.更一般地说，我建议您查看以下 parfor上的教程.

In MATLAB, parfor cannot be nested. Which means, in your code, you should replace one parfor by a for (the outer loop most likely). More generally, I advise you to look at this tutorial on parfor.

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