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Subject: RE: [PATCH v12 3/6] ptr_compress: add pointer compression library
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Date: Wed, 29 May 2024 13:52:49 +0200
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Thread-Topic: [PATCH v12 3/6] ptr_compress: add pointer compression library
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From: =?iso-8859-1?Q?Morten_Br=F8rup?= <mb@smartsharesystems.com>
To: "Paul Szczepanek" <paul.szczepanek@arm.com>,
	<dev@dpdk.org>
Cc: "Honnappa Nagarahalli" <honnappa.nagarahalli@arm.com>,
 "Kamalakshitha Aligeri" <kamalakshitha.aligeri@arm.com>,
 "Nathan Brown" <nathan.brown@arm.com>,
 "Jack Bond-Preston" <jack.bond-preston@foss.arm.com>
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> From: Paul Szczepanek [mailto:paul.szczepanek@arm.com]
> Sent: Wednesday, 29 May 2024 12.23
>=20
> Add a new utility header for compressing pointers. The provided
> functions can store pointers as 32-bit or 16-bit offsets.
>=20
> 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.
>=20
> 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 Br=F8rup <mb@smartsharesystems.com>