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Statistics for Memory Allocation with malloc
You can get information about dynamic memory allocation by calling the
mallinfo
function. This function and its associated data type
are declared in malloc.h
; they are an extension of the standard
SVID/XPG version.
struct mallinfo
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Data Type |
This structure type is used to return information about the dynamic
memory allocator. It contains the following members:
int arena
- This is the total size of memory allocated with
sbrk by
malloc , in bytes.
int ordblks
- This is the number of chunks not in use. (The memory allocator
internally gets chunks of memory from the operating system, and then
carves them up to satisfy individual
malloc requests; see
Efficiency and Malloc.)
int smblks
- This field is unused.
int hblks
- This is the total number of chunks allocated with
mmap .
int hblkhd
- This is the total size of memory allocated with
mmap , in bytes.
int usmblks
- This field is unused.
int fsmblks
- This field is unused.
int uordblks
- This is the total size of memory occupied by chunks handed out by
malloc .
int fordblks
- This is the total size of memory occupied by free (not in use) chunks.
int keepcost
- This is the size of the top-most releasable chunk that normally
borders the end of the heap (i.e. the high end of the virtual address
space's data segment).
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struct mallinfo mallinfo (void)
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Function |
This function returns information about the current dynamic memory usage
in a structure of type struct mallinfo .
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