你如何评估内存消耗？

Question

I would like to know if there is an efficient way to measure the actual memory consumption of a particular C data structure.

The goal being to make benchmarks based on how the memory usage changes after specific operations on those data structures.

I do not seek a way to count the number of objects in use; I do want to know exactly how big the memory usage of an object put under stress can get.

Is there a standard way to do that, either in C code, or from outside? (Some equivalent to the time (1) utility would be a start).

Obviously, I could track down every single pointer and do a sum of all sizeof s. If this is the only way, please do tell me. I wonder whether there is a simpler way. Or maybe a library to do it for me.

Answer 1

如果要在全局级别监视程序的内存使用情况，可以使用自己的函数替换C ++中的new/delete或C中的malloc/free ，并记录内存使用情况。

Answer 2

在Unix上用于内存消耗你可以使用valgrind和工具Massif（+任何可视化工具），但我不知道它是否适合你的问题，因为它会给你一个详细的程序内存消耗的视图。

Answer 3

Yep, cnicutar, on Linux you have pmap or maybe even pstat.

On MS there are myriad profiling tools for VStudio depending on your contribution to the MS machine (even free ones for cmd line use). Call me a green horn, I don't have issues with memory leaks.