The issue is resolved. Using dbx, we could place a breakpoint in mmap. Using 
this, we could figure out that the excessive number of threads
that we are creating in our application is the root cause for this issue.

Using dbx, we identified that 'pthread_attr_init' is invoking mmap - ANON calls 
in power of 2 pattern.We modified our design and avoided  the creation of these 
threads. Now the memory bloat is not seen.

Thanks
Sanath
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