Hi,

I want to check the program memory usage, data/bss, heap

I am using showmem -P to get the process memory usage

In my program, I create a large static buffer:

static char testBuf[10240]; // 10k bytes buffer
memset(testBuf, 0, sizeof(testBuf)); // set to zero

open this program in momentics, it shows
.bss	0x00002800 testBuf
total .bss  0x000152e0

this is correct, testBuf is static variable and it should belong to .bss section

When I ran this program in qnx 6.4.1, using showmem
it gives 
Total             Code         Data        Heap         Stack     Other
4382720    1540096      81920    2752512       8192          0

Now, I remove the testBuf. after compiled, 
total .bss  0x00012ae0,   so the difference is 0x2800 which makes sense.

However, when I ran the new program again, check the showmem
it shows:
Total             Code         Data        Heap         Stack     Other
4374528    1540096      81920    2744320       8192          0

I am expecting Data section reduced, however, it is not and the heap section reduced.

Does it means .bss includes in the Heap section in showmem??

Thanks