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关于内存使用的问题 #1

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GoogleCodeExporter opened this issue Jun 24, 2015 · 1 comment

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auto-migrated Priority-Medium Type-Defect

GoogleCodeExporter commented Jun 24, 2015

评测的时候无论是Windows还是Linux对内存使用的计算都不准确��
�. 有一个开了100+MB内存的程序, 测出来才20M左右

Original issue reported on code.google.com by [email protected] on 8 May 2012 at 11:30

The text was updated successfully, but these errors were encountered:

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GoogleCodeExporter commented Jun 24, 2015

这个问题有些复杂……
首先Windows和Linux都有虚拟内存技术，程序开数组的时候是申��
�虚拟内存，然后在运行的时候如果使用到了，才会映射到物�
��内存，并且Windows和Linux都使用懒惰策略。
例如你开了一个长度1000000的数组，只用了前100000个元素，那�
��实际使用的物理内存只有前100000个元素占用的空间。
Lemon显示出来的内存使用量是PrivateWorkingSet(Windows)，也就是在�
��理内存中的占用量。但是Lemon同时也会检测申请的虚拟内存�
��否超过内存限制（Windows和Linux下都会）。
你可以试试看将内存限制调整到64MB，这个开了100MB+数组的程�
��应该是会MLE的。

Original comment by [email protected] on 28 May 2012 at 12:34

GoogleCodeExporter added Priority-Medium Type-Defect auto-migrated labels

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