CODEWITHSUNDEEP
c++linuxmemoryrhel
User12547645
User12547645

Reputation: 8447

How to programatically get the memory usage of the current program?

I would like to get some information about the memory usage of my C++ program. The way I do this is by accessing /proc/self/stat and printing the virtual and resident set size.

You can find an example here.

Is this a good way to go? How accurate is the information I am accessing*?

Could someone recommend a better way to measure memory usage programmatically?

*Asking, because I get unexpected, sudden jumps of mem usage. My expectation was that the information is perfectly accurate.

OS: I am running inside a docker container, which is based on RHEL.

Additional info: If I limit the memory usage of the container with docker run -m, the printed memory is greater than the limit I set.

Upvotes: 0

Views: 272

Answers (1)

eerorika
eerorika

Reputation: 238351

How to programatically get the memory usage of the current program?

There is no standard way to get memory usage of a program in C++.

The concept of "memory usage" itself is somewhat vague and can mean different things. Depending on what you mean, there may or might not be a system specific way to get the information.

The way I do this is by accessing /proc/self/stat

Is this a good way to go?

I don't think so. As far as I know, /proc filesystem is not portable. Use the getrusage function on POSIX systems.

Upvotes: 2

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