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crypto: Add prefetching for src and dst

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Adding prefetching to openssl plugin improves both sync and async mode
ipsec performance by more than 5% on N1 ampere.

Sync mode (1420b)
core count            old (MPPS)              new (MPPS) 	%diff
    1c                  0.972                   1.01            3.90
    2c                  1.91                    2.02            5.87
    3c                  2.86                    3.04            6.03

Async mode (1420b)
core count            old (MPPS)              new (MPPS)        %diff
    1c			1.296                   1.37		5.70
    2c			2.58			2.753		6.70
    3c			3.74			3.9		4.27
    6c			7.52			7.832		4.14

Type: improvement
Change-Id: Ieef22c37e1330ac9f8b7e09a25c24162516b6c26
Signed-off-by: Niyaz Murshed <niyaz.murshed@arm.com>
This commit is contained in:
Niyaz Murshed
2024-06-04 02:35:46 +00:00
committed by Fan Zhang
parent ed9843826a
commit 290dc7b63e
1 changed files with 11 additions and 0 deletions
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src/plugins/crypto_openssl/main.c
+11
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@@ -219,6 +219,17 @@ openssl_ops_enc_aead (vlib_main_t *vm, vnet_crypto_op_t *ops[],
vnet_crypto_op_t *op = ops[i];
int len = 0;
if (i + 2 < n_ops)
{
CLIB_PREFETCH (ops[i + 1]->src, 4 * CLIB_CACHE_PREFETCH_BYTES, LOAD);
CLIB_PREFETCH (ops[i + 1]->dst, 4 * CLIB_CACHE_PREFETCH_BYTES,
STORE);
CLIB_PREFETCH (ops[i + 2]->src, 4 * CLIB_CACHE_PREFETCH_BYTES, LOAD);
CLIB_PREFETCH (ops[i + 2]->dst, 4 * CLIB_CACHE_PREFETCH_BYTES,
STORE);
}
ctx = ptd->evp_cipher_enc_ctx[op->key_index];
EVP_EncryptInit_ex (ctx, 0, 0, NULL, op->iv);
if (op->aad_len)