703be9531a
For key search, the signatures of all entries are compared against the signature of the key that is being looked up. Since all signatures are contiguously put in a bucket, they can be compared with vector instructions (AVX2), achieving higher lookup performance. This patch adds AVX2 implementation in a separate header file. Signed-off-by: Yipeng Wang <yipeng1.wang@intel.com> Reviewed-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>
108 lines
3.5 KiB
C
108 lines
3.5 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright(c) 2017 Intel Corporation. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _RTE_MEMBER_X86_H_
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#define _RTE_MEMBER_X86_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <x86intrin.h>
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#if defined(RTE_MACHINE_CPUFLAG_AVX2)
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static inline int
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update_entry_search_avx(uint32_t bucket_id, member_sig_t tmp_sig,
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struct member_ht_bucket *buckets,
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member_set_t set_id)
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{
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uint32_t hitmask = _mm256_movemask_epi8((__m256i)_mm256_cmpeq_epi16(
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_mm256_load_si256((__m256i const *)buckets[bucket_id].sigs),
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_mm256_set1_epi16(tmp_sig)));
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if (hitmask) {
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uint32_t hit_idx = __builtin_ctzl(hitmask) >> 1;
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buckets[bucket_id].sets[hit_idx] = set_id;
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return 1;
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}
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return 0;
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}
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static inline int
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search_bucket_single_avx(uint32_t bucket_id, member_sig_t tmp_sig,
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struct member_ht_bucket *buckets,
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member_set_t *set_id)
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{
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uint32_t hitmask = _mm256_movemask_epi8((__m256i)_mm256_cmpeq_epi16(
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_mm256_load_si256((__m256i const *)buckets[bucket_id].sigs),
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_mm256_set1_epi16(tmp_sig)));
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while (hitmask) {
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uint32_t hit_idx = __builtin_ctzl(hitmask) >> 1;
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if (buckets[bucket_id].sets[hit_idx] != RTE_MEMBER_NO_MATCH) {
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*set_id = buckets[bucket_id].sets[hit_idx];
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return 1;
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}
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hitmask &= ~(3U << ((hit_idx) << 1));
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}
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return 0;
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}
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static inline void
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search_bucket_multi_avx(uint32_t bucket_id, member_sig_t tmp_sig,
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struct member_ht_bucket *buckets,
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uint32_t *counter,
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uint32_t match_per_key,
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member_set_t *set_id)
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{
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uint32_t hitmask = _mm256_movemask_epi8((__m256i)_mm256_cmpeq_epi16(
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_mm256_load_si256((__m256i const *)buckets[bucket_id].sigs),
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_mm256_set1_epi16(tmp_sig)));
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while (hitmask) {
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uint32_t hit_idx = __builtin_ctzl(hitmask) >> 1;
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if (buckets[bucket_id].sets[hit_idx] != RTE_MEMBER_NO_MATCH) {
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set_id[*counter] = buckets[bucket_id].sets[hit_idx];
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(*counter)++;
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if (*counter >= match_per_key)
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return;
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}
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hitmask &= ~(3U << ((hit_idx) << 1));
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}
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}
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif /* _RTE_MEMBER_X86_H_ */
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