[PATCH 0/1] hash: add SVE support for bulk key lookup

[Harjot Singh]

- Add SVE code to compare_signatures().
- Tested on Aarch64 N2 based platform with 128 bit vector registers. 

Performance Numbers from hash_perf_autotest :

Elements in Primary or Secondary Location

Results (in CPU cycles/operation)
-----------------------------------
 Operations without data

Without pre-computed hash values

Keysize     Add/Lookup/Lookup_bulk
            Neon         SVE
4           93/71/26     93/71/27
8           93/70/26     93/70/27
9           94/74/27     94/74/28
13          100/80/31    100/79/32
16          100/78/30    100/78/31
32          109/110/38   108/110/39

With pre-computed hash values

Keysize     Add/Lookup/Lookup_bulk
            Neon         SVE
4           83/58/27     83/58/29
8           83/57/27     83/57/28
9           83/60/28     83/60/29
13          84/60/28     83/60/29
16          83/58/27     83/58/29
32          84/68/31     84/68/32

Note: Functionality verified with 256 bit vector length platform.

Harjot Singh (1):
  hash: add SVE support for bulk key lookup

 .mailmap                   |  1 +
 lib/hash/rte_cuckoo_hash.c | 37 ++++++++++++++++++++++++++++++++++++-
 lib/hash/rte_cuckoo_hash.h |  1 +
 3 files changed, 38 insertions(+), 1 deletion(-)

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2.25.1