Memory leaking and embedded linux

Question

I am running my own c++ program in embedded linux. At first VSZ is ~6000kB (top) but after 1h VSZ is increased ~100kB. In the program there is two threads. Both threads take tcp and ssl connections almost all the time. I have run same program in depian linux with valgrind. Valgrind didn't find any errors. I didn't find a way how to compile valgrind to that embedded linux. Is it possible that valgrind doesn't find all the error from threads? Can you help me somehow?

Answer 1

You should not jump into the conclusion that your program is "leaking memory" just because the VSZ increased after a while. This is normal especially that the program is accepting network connections. I recoomend this:

1 - If you are using busybox's "top", install procps and use its "top". It gives better info regarding memory status.

2 - Monitor the stack used by each thread. The satck can grow over time and will reflect in the VSZ.