Re: incorrect malloc_stats output

[Prem Gopalan]

> Please note also that the "Total" including mmap is unreliable when
> multiple threads are used.  The counting of the size of mmapped
> regions as in
> 
>     mp_.mmapped_mem += size;
> 
> is done outside a mutex lock for performance, and may not be atomic.
> 

Yes, I knew about this although I dont quite understand why my program
(attached in prev mail) should cause so many mmap regions. The chunks are
smaller than DEFAULT_MMAP_THRESHOLD of 128KB.

> However, even your total without mmap (sum of system bytes for Arena
> 0-3) exceeds 3GB, which seems bogus unless you have a kernel where the
> top of stack would be at 0xD0000000.

Top of stack using the program attached : bffffa74
sbrk limit : 3fffea7c

Thanks,
Prem.

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