d35cc1fe6a
Revert the patchset run-time Linking support including the following 3 commits: Fixes:84cc318424("eal/x86: select optimized memcpy at run-time") Fixes:c7fbc80fe6("test: select memcpy alignment unit at run-time") Fixes:5f180ae329("efd: move AVX2 lookup in its own compilation unit") The patchset would cause perf drop in vhost/virtio loopback performance test. Because the run-time dispatch must cost at least a function call comparing to the compile-time dispatch. And the reference cpu cycles value is small. And in the test, when using 128-256 bytes packet, it would cause 16%-20% perf drop with mergeble path. When using 256 bytes packet, it would cause 13% perf drop with vector path. Signed-off-by: Xiaoyun Li <xiaoyun.li@intel.com>
87 lines
3.2 KiB
C
87 lines
3.2 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright(c) 2016-2017 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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/* rte_efd_x86.h
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* This file holds all x86 specific EFD functions
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*/
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#include <immintrin.h>
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#if (RTE_EFD_VALUE_NUM_BITS == 8 || RTE_EFD_VALUE_NUM_BITS == 16 || \
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RTE_EFD_VALUE_NUM_BITS == 24 || RTE_EFD_VALUE_NUM_BITS == 32)
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#define EFD_LOAD_SI128(val) _mm_load_si128(val)
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#else
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#define EFD_LOAD_SI128(val) _mm_lddqu_si128(val)
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#endif
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static inline efd_value_t
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efd_lookup_internal_avx2(const efd_hashfunc_t *group_hash_idx,
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const efd_lookuptbl_t *group_lookup_table,
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const uint32_t hash_val_a, const uint32_t hash_val_b)
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{
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#ifdef RTE_MACHINE_CPUFLAG_AVX2
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efd_value_t value = 0;
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uint32_t i = 0;
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__m256i vhash_val_a = _mm256_set1_epi32(hash_val_a);
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__m256i vhash_val_b = _mm256_set1_epi32(hash_val_b);
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for (; i < RTE_EFD_VALUE_NUM_BITS; i += 8) {
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__m256i vhash_idx =
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_mm256_cvtepu16_epi32(EFD_LOAD_SI128(
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(__m128i const *) &group_hash_idx[i]));
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__m256i vlookup_table = _mm256_cvtepu16_epi32(
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EFD_LOAD_SI128((__m128i const *)
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&group_lookup_table[i]));
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__m256i vhash = _mm256_add_epi32(vhash_val_a,
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_mm256_mullo_epi32(vhash_idx, vhash_val_b));
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__m256i vbucket_idx = _mm256_srli_epi32(vhash,
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EFD_LOOKUPTBL_SHIFT);
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__m256i vresult = _mm256_srlv_epi32(vlookup_table,
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vbucket_idx);
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value |= (_mm256_movemask_ps(
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(__m256) _mm256_slli_epi32(vresult, 31))
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& ((1 << (RTE_EFD_VALUE_NUM_BITS - i)) - 1)) << i;
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}
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return value;
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#else
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RTE_SET_USED(group_hash_idx);
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RTE_SET_USED(group_lookup_table);
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RTE_SET_USED(hash_val_a);
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RTE_SET_USED(hash_val_b);
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/* Return dummy value, only to avoid compilation breakage */
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return 0;
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#endif
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}
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