Ah, sorry, I missed that you were talking about memory usage (as opposed to shared object file size).  And yes, I do get similar numbers.

Note that the "Size" figures (like your 2044 kB) are rather meaningless. You can think of them as the address regions that a process could (in theory) access without causing a segfault.  As long as it doesn't, the figure is irrelevant for what one typically thinks of as "memory usage". What's more interesting in this regard is the resident size (RSS), in particular the private (non-shared) pages of it. But note that this is also a somewhat too simplified view of things...

Anyhow, for a more detailed analysis of memory usage, you might be interested in exmap. Its docs give a good overview of the terminolgy, btw.

Also, there's Linux::Smaps, so you don't have to parse the proc file yourself. And IIRC, there's even a script "out there" (using this module) which assembles the smaps info and creates an easier-to-digest summary report.  Unfortunately, I can't remember its name, but maybe you can dig it up...