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* [PATCH v3 0/4] hash: add SVE support for bulk key lookup
@ 2023-11-07 12:18 Yoan Picchi
  2023-11-07 12:18 ` [PATCH v3 1/4] hash: pack the hitmask for hash in bulk lookup Yoan Picchi
                   ` (4 more replies)
  0 siblings, 5 replies; 10+ messages in thread
From: Yoan Picchi @ 2023-11-07 12:18 UTC (permalink / raw)
  To: Thomas Monjalon, Yipeng Wang, Sameh Gobriel, Bruce Richardson,
	Vladimir Medvedkin
  Cc: Nathan Brown, Ruifeng Wang, dev, Yoan Picchi

This patchset adds SVE support for the signature comparison in the cuckoo
hash lookup and improves the existing NEON implementation. These
optimizations required changes to the data format and signature of the
relevant functions to support dense hitmasks (no padding) and having the
primary and secondary hitmasks interleaved instead of being in their own
array each.

Benchmarking the cuckoo hash perf test, I observed this effect on speed:
  There are no significant changes on Intel (ran on Sapphire Rapids)
  Neon is up to 7-10% faster (ran on ampere altra)
  128b SVE is about 3-5% slower than the optimized neon (ran on a graviton
    3 cloud instance)
  256b SVE is about 0-3% slower than the optimized neon (ran on a graviton
    3 cloud instance)

V2->V3:
  Remove a redundant if in the test
  Change a couple int to uint16_t in compare_signatures_dense
  Several codding-style fix

Yoan Picchi (4):
  hash: pack the hitmask for hash in bulk lookup
  hash: optimize compare signature for NEON
  test/hash: check bulk lookup of keys after collision
  hash: add SVE support for bulk key lookup

 .mailmap                   |   2 +
 app/test/test_hash.c       |  99 ++++++++++----
 lib/hash/rte_cuckoo_hash.c | 264 +++++++++++++++++++++++++++++--------
 lib/hash/rte_cuckoo_hash.h |   1 +
 4 files changed, 287 insertions(+), 79 deletions(-)

-- 
2.25.1


^ permalink raw reply	[flat|nested] 10+ messages in thread

end of thread, other threads:[~2024-02-27  6:03 UTC | newest]

Thread overview: 10+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2023-11-07 12:18 [PATCH v3 0/4] hash: add SVE support for bulk key lookup Yoan Picchi
2023-11-07 12:18 ` [PATCH v3 1/4] hash: pack the hitmask for hash in bulk lookup Yoan Picchi
2023-11-07 12:18 ` [PATCH v3 2/4] hash: optimize compare signature for NEON Yoan Picchi
2023-11-07 12:18 ` [PATCH v3 3/4] test/hash: check bulk lookup of keys after collision Yoan Picchi
2023-11-07 12:18 ` [PATCH v3 4/4] hash: add SVE support for bulk key lookup Yoan Picchi
2024-02-26 17:01 ` [PATCH v4 0/4] " Yoan Picchi
2024-02-26 17:02   ` [PATCH v4 1/4] hash: pack the hitmask for hash in bulk lookup Yoan Picchi
2024-02-26 17:02   ` [PATCH v4 2/4] hash: optimize compare signature for NEON Yoan Picchi
2024-02-26 17:02   ` [PATCH v4 3/4] test/hash: check bulk lookup of keys after collision Yoan Picchi
2024-02-26 17:02   ` [PATCH v4 4/4] hash: add SVE support for bulk key lookup Yoan Picchi

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