This series improves the hash library's key comparison performance and portability. The main goals are:
- Hide internal implementation details to prevent future ABI breakage - Enable optimized key comparisons on all architectures (not just x86 and ARM64) - Add specialized compare functions for common small key sizes (2-20 bytes) to avoid memcmp overhead - Improve test coverage and code quality Changes in v5: - Rebase onto latest main - New patch: remove spurious warnings in CRC32 algorithm selection that fired even when the requested algorithm was successfully used - Improved commit message for patch 4 (was patch 3) - New patch: convert hash unit tests to use test suite runner framework for structured output with per-test pass/fail status - New patch: add dedicated test for key compare functions that exercises all sizes in cmp_jump_table - Use table lookup instead of switch statement for key size selection - Add static_assert to verify table consistency - Fix minor return value issues in small key compare functions Changes in v4: - Add test for more key sizes - Add a few more special case sizes Stephen Hemminger (7): hash: move table of hash compare functions out of header hash: use static_assert hash: remove spurious warnings in CRC32 init hash: simplify key comparison across architectures hash: add support for common small key sizes app/test: convert hash test to use test suite runner test/hash: add test for key compare functions app/test/test_hash.c | 249 +++++++++++++++++++++--------- lib/hash/rte_cmp_arm64.h | 62 +------- lib/hash/rte_cmp_generic.h | 35 +++++ lib/hash/rte_cmp_x86.h | 62 +------- lib/hash/rte_cuckoo_hash.c | 301 ++++++++++++++++++++++++++++++++----- lib/hash/rte_cuckoo_hash.h | 84 +---------- lib/hash/rte_hash_crc.c | 8 +- 7 files changed, 490 insertions(+), 311 deletions(-) create mode 100644 lib/hash/rte_cmp_generic.h -- 2.51.0
