mempool: retrieve objects location info

Add two functions:
- rte_mempool_get_mem_range - get virtual memory range
of the objects in the mempool,
- rte_mempool_get_obj_alignment - get alignment of
ob

mempool: retrieve objects location info

Add two functions:
- rte_mempool_get_mem_range - get virtual memory range
of the objects in the mempool,
- rte_mempool_get_obj_alignment - get alignment of
objects in the mempool.

Add two tests that test these new functions.

Signed-off-by: Paul Szczepanek <paul.szczepanek@arm.com>
Reviewed-by: Jack Bond-Preston <jack.bond-preston@foss.arm.com>
Reviewed-by: Nathan Brown <nathan.brown@arm.com>
Acked-by: Morten Brørup <mb@smartsharesystems.com>
Acked-by: Konstantin Ananyev <konstantin.v.ananyev@yandex.ru>

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test/ring_perf: add some pointer compression tests

Add a test that runs a zero copy burst enqueue and dequeue on a ring
of raw pointers and compressed pointers at different burst sizes to
showcase p

test/ring_perf: add some pointer compression tests

Add a test that runs a zero copy burst enqueue and dequeue on a ring
of raw pointers and compressed pointers at different burst sizes to
showcase performance benefits of newly added pointer compression APIs.

Refactored threading code to pass more parameters to threads to
reuse existing code. Added more bulk sizes to showcase their effects
on compression. Adjusted loop iteration numbers to take into account
bulk sizes to keep runtime constant (instead of number of operations).

Adjusted old printfs to match new ones which have aligned numbers.

Signed-off-by: Paul Szczepanek <paul.szczepanek@arm.com>
Reviewed-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>
Reviewed-by: Nathan Brown <nathan.brown@arm.com>
Reviewed-by: Jack Bond-Preston <jack.bond-preston@foss.arm.com>

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ptr_compress: add pointer compression library

Add a new utility header for compressing pointers. The provided
functions can store pointers as 32-bit or 16-bit offsets.

The compression takes advanta

ptr_compress: add pointer compression library

Add a new utility header for compressing pointers. The provided
functions can store pointers as 32-bit or 16-bit offsets.

The compression takes advantage of the fact that pointers are
usually located in a limited memory region (like a mempool).
We can compress them by converting them to offsets from a base
memory address. Offsets can be stored in fewer bytes (dictated
by the memory region size and alignment of the pointer).
For example: an 8 byte aligned pointer which is part of a 32GB
memory pool can be stored in 4 bytes.

Suggested-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>
Signed-off-by: Paul Szczepanek <paul.szczepanek@arm.com>
Signed-off-by: Kamalakshitha Aligeri <kamalakshitha.aligeri@arm.com>
Reviewed-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>
Reviewed-by: Nathan Brown <nathan.brown@arm.com>
Reviewed-by: Jack Bond-Preston <jack.bond-preston@foss.arm.com>
Acked-by: Morten Brørup <mb@smartsharesystems.com>

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