Hi all.
I'm using Linux, however don't know well about shared memory and shared library concept.
I'd like to use ps_mem to calculate and analyze my application's memory usage but I got a question.

My application uses a big shared library. (.so files)
It's architecture is as below:

1. My application is composed of partA andB.
2. A is run as a process.
3. A forksB, so thatB is run as another process.
4. A can forksB many times.
5. B uses a big shared libraryC.

Case 1:A forksB once.

 10.6 MiB + 614.5 KiB =  11.2 MiB       A106.0 MiB +  28.5 MiB = 134.4 MiB       B

Case 2:A forksB twice.

 12.6 MiB + 432.5 KiB =  13.0 MiB       A180.6 MiB +  59.3 MiB = 239.9 MiB       B (2)

Case 3:A forksB three times.

 14.6 MiB + 350.5 KiB =  15.0 MiB       A270.5 MiB +  74.1 MiB = 344.6 MiB       B (3)

I thought that the big shared library,C might be shared, so thatB's shared memory size might be almost same.
But, according to the test result, its size might be multiplied as the number of forks.

Why is the shared size multiplied?