Tracking userspace memory allocation with glibc-utils memusage

Will Cohen turned me on to a little helper tool called memusage, which is distributed with glibc.  The purpose of that tool is to trace memory allocation behavior of a process.

In RHEL, the memusage binary is part of the glibc-utils package.  There’s actually also a shared library called /usr/lib64/libmemusage.so that’s part of the base glibc package, which can be used via LD_PRELOAD.

memusage writes output to your terminal, as below:

It is also capable of writing memory allocation over time to a png file, for example:

Netperf is not a particularly memory-intensive benchmark for illustrating it’s usage, just wanted to describe the utility.  I’ll upload more interesting graphs when I run more loads with the library.

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