hash: replace libc memcmp with optimized functions for arm64
The following measurements shows improvement over the default libc memcmp function Length(B) by X% over libc memcmp 16 149.57% 32 122.7% 48 104.96% 64 98.21% 80 93.75% 96 90.55% 112 110.48% 128 137.24% Signed-off-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
This commit is contained in:
Jerin Jacob
Thomas Monjalon
parent
e079655c41
commit
f123e3d2ca
114
lib/librte_hash/rte_cmp_arm64.h
Normal file
114
lib/librte_hash/rte_cmp_arm64.h
Normal file
@ -0,0 +1,114 @@
|
||||
/*-
|
||||
* BSD LICENSE
|
||||
*
|
||||
* Copyright(c) 2015 Cavium networks. All rights reserved.
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
*
|
||||
* * Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* * Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in
|
||||
* the documentation and/or other materials provided with the
|
||||
* distribution.
|
||||
* * Neither the name of Cavium networks nor the names of its
|
||||
* contributors may be used to endorse or promote products derived
|
||||
* from this software without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||||
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
||||
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
||||
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
||||
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||||
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||||
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||||
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
/* Functions to compare multiple of 16 byte keys (up to 128 bytes) */
|
||||
static int
|
||||
rte_hash_k16_cmp_eq(const void *key1, const void *key2,
|
||||
size_t key_len __rte_unused)
|
||||
{
|
||||
uint64_t x0, x1, y0, y1;
|
||||
|
||||
asm volatile(
|
||||
"ldp %x[x1], %x[x0], [%x[p1]]"
|
||||
: [x1]"=r"(x1), [x0]"=r"(x0)
|
||||
: [p1]"r"(key1)
|
||||
);
|
||||
asm volatile(
|
||||
"ldp %x[y1], %x[y0], [%x[p2]]"
|
||||
: [y1]"=r"(y1), [y0]"=r"(y0)
|
||||
: [p2]"r"(key2)
|
||||
);
|
||||
x0 ^= y0;
|
||||
x1 ^= y1;
|
||||
return !(x0 == 0 && x1 == 0);
|
||||
}
|
||||
|
||||
static int
|
||||
rte_hash_k32_cmp_eq(const void *key1, const void *key2, size_t key_len)
|
||||
{
|
||||
return rte_hash_k16_cmp_eq(key1, key2, key_len) ||
|
||||
rte_hash_k16_cmp_eq((const char *) key1 + 16,
|
||||
(const char *) key2 + 16, key_len);
|
||||
}
|
||||
|
||||
static int
|
||||
rte_hash_k48_cmp_eq(const void *key1, const void *key2, size_t key_len)
|
||||
{
|
||||
return rte_hash_k16_cmp_eq(key1, key2, key_len) ||
|
||||
rte_hash_k16_cmp_eq((const char *) key1 + 16,
|
||||
(const char *) key2 + 16, key_len) ||
|
||||
rte_hash_k16_cmp_eq((const char *) key1 + 32,
|
||||
(const char *) key2 + 32, key_len);
|
||||
}
|
||||
|
||||
static int
|
||||
rte_hash_k64_cmp_eq(const void *key1, const void *key2, size_t key_len)
|
||||
{
|
||||
return rte_hash_k32_cmp_eq(key1, key2, key_len) ||
|
||||
rte_hash_k32_cmp_eq((const char *) key1 + 32,
|
||||
(const char *) key2 + 32, key_len);
|
||||
}
|
||||
|
||||
static int
|
||||
rte_hash_k80_cmp_eq(const void *key1, const void *key2, size_t key_len)
|
||||
{
|
||||
return rte_hash_k64_cmp_eq(key1, key2, key_len) ||
|
||||
rte_hash_k16_cmp_eq((const char *) key1 + 64,
|
||||
(const char *) key2 + 64, key_len);
|
||||
}
|
||||
|
||||
static int
|
||||
rte_hash_k96_cmp_eq(const void *key1, const void *key2, size_t key_len)
|
||||
{
|
||||
return rte_hash_k64_cmp_eq(key1, key2, key_len) ||
|
||||
rte_hash_k32_cmp_eq((const char *) key1 + 64,
|
||||
(const char *) key2 + 64, key_len);
|
||||
}
|
||||
|
||||
static int
|
||||
rte_hash_k112_cmp_eq(const void *key1, const void *key2, size_t key_len)
|
||||
{
|
||||
return rte_hash_k64_cmp_eq(key1, key2, key_len) ||
|
||||
rte_hash_k32_cmp_eq((const char *) key1 + 64,
|
||||
(const char *) key2 + 64, key_len) ||
|
||||
rte_hash_k16_cmp_eq((const char *) key1 + 96,
|
||||
(const char *) key2 + 96, key_len);
|
||||
}
|
||||
|
||||
static int
|
||||
rte_hash_k128_cmp_eq(const void *key1, const void *key2, size_t key_len)
|
||||
{
|
||||
return rte_hash_k64_cmp_eq(key1, key2, key_len) ||
|
||||
rte_hash_k64_cmp_eq((const char *) key1 + 64,
|
||||
(const char *) key2 + 64, key_len);
|
||||
}
|
||||
@ -63,6 +63,10 @@
|
||||
#include "rte_cmp_x86.h"
|
||||
#endif
|
||||
|
||||
#if defined(RTE_ARCH_ARM64)
|
||||
#include "rte_cmp_arm64.h"
|
||||
#endif
|
||||
|
||||
TAILQ_HEAD(rte_hash_list, rte_tailq_entry);
|
||||
|
||||
static struct rte_tailq_elem rte_hash_tailq = {
|
||||
@ -280,7 +284,8 @@ rte_hash_create(const struct rte_hash_parameters *params)
|
||||
* If x86 architecture is used, select appropriate compare function,
|
||||
* which may use x86 instrinsics, otherwise use memcmp
|
||||
*/
|
||||
#if defined(RTE_ARCH_X86_64) || defined(RTE_ARCH_I686) || defined(RTE_ARCH_X86_X32)
|
||||
#if defined(RTE_ARCH_X86_64) || defined(RTE_ARCH_I686) ||\
|
||||
defined(RTE_ARCH_X86_X32) || defined(RTE_ARCH_ARM64)
|
||||
/* Select function to compare keys */
|
||||
switch (params->key_len) {
|
||||
case 16:
|
||||
|
||||
Loading…
Reference in New Issue
Block a user