[dpdk-dev] [PATCH v2] examples/l3fwd: em: use hw accelerated crc hash function for arm64
Hemant Agrawal
hemant.agrawal at nxp.com
Thu Oct 13 20:47:05 CEST 2016
if machine level CRC extension are available, offload the
hash to machine provide functions e.g. armv8-a CRC extensions
support it
Signed-off-by: Hemant Agrawal <hemant.agrawal at nxp.com>
Reviewed-by: Jerin Jacob <jerin.jacob at caviumnetworks.com>
---
examples/l3fwd/l3fwd_em.c | 24 ++++++++++++++----------
1 file changed, 14 insertions(+), 10 deletions(-)
diff --git a/examples/l3fwd/l3fwd_em.c b/examples/l3fwd/l3fwd_em.c
index 89a68e6..d92d0aa 100644
--- a/examples/l3fwd/l3fwd_em.c
+++ b/examples/l3fwd/l3fwd_em.c
@@ -57,13 +57,17 @@
#include "l3fwd.h"
-#ifdef RTE_MACHINE_CPUFLAG_SSE4_2
+#if defined(RTE_MACHINE_CPUFLAG_SSE4_2) && defined(RTE_MACHINE_CPUFLAG_CRC32)
+#define EM_HASH_CRC 1
+#endif
+
+#ifdef EM_HASH_CRC
#include <rte_hash_crc.h>
#define DEFAULT_HASH_FUNC rte_hash_crc
#else
#include <rte_jhash.h>
#define DEFAULT_HASH_FUNC rte_jhash
-#endif /* RTE_MACHINE_CPUFLAG_SSE4_2 */
+#endif
#define IPV6_ADDR_LEN 16
@@ -168,17 +172,17 @@ ipv4_hash_crc(const void *data, __rte_unused uint32_t data_len,
t = k->proto;
p = (const uint32_t *)&k->port_src;
-#ifdef RTE_MACHINE_CPUFLAG_SSE4_2
+#ifdef EM_HASH_CRC
init_val = rte_hash_crc_4byte(t, init_val);
init_val = rte_hash_crc_4byte(k->ip_src, init_val);
init_val = rte_hash_crc_4byte(k->ip_dst, init_val);
init_val = rte_hash_crc_4byte(*p, init_val);
-#else /* RTE_MACHINE_CPUFLAG_SSE4_2 */
+#else
init_val = rte_jhash_1word(t, init_val);
init_val = rte_jhash_1word(k->ip_src, init_val);
init_val = rte_jhash_1word(k->ip_dst, init_val);
init_val = rte_jhash_1word(*p, init_val);
-#endif /* RTE_MACHINE_CPUFLAG_SSE4_2 */
+#endif
return init_val;
}
@@ -190,16 +194,16 @@ ipv6_hash_crc(const void *data, __rte_unused uint32_t data_len,
const union ipv6_5tuple_host *k;
uint32_t t;
const uint32_t *p;
-#ifdef RTE_MACHINE_CPUFLAG_SSE4_2
+#ifdef EM_HASH_CRC
const uint32_t *ip_src0, *ip_src1, *ip_src2, *ip_src3;
const uint32_t *ip_dst0, *ip_dst1, *ip_dst2, *ip_dst3;
-#endif /* RTE_MACHINE_CPUFLAG_SSE4_2 */
+#endif
k = data;
t = k->proto;
p = (const uint32_t *)&k->port_src;
-#ifdef RTE_MACHINE_CPUFLAG_SSE4_2
+#ifdef EM_HASH_CRC
ip_src0 = (const uint32_t *) k->ip_src;
ip_src1 = (const uint32_t *)(k->ip_src+4);
ip_src2 = (const uint32_t *)(k->ip_src+8);
@@ -218,14 +222,14 @@ ipv6_hash_crc(const void *data, __rte_unused uint32_t data_len,
init_val = rte_hash_crc_4byte(*ip_dst2, init_val);
init_val = rte_hash_crc_4byte(*ip_dst3, init_val);
init_val = rte_hash_crc_4byte(*p, init_val);
-#else /* RTE_MACHINE_CPUFLAG_SSE4_2 */
+#else
init_val = rte_jhash_1word(t, init_val);
init_val = rte_jhash(k->ip_src,
sizeof(uint8_t) * IPV6_ADDR_LEN, init_val);
init_val = rte_jhash(k->ip_dst,
sizeof(uint8_t) * IPV6_ADDR_LEN, init_val);
init_val = rte_jhash_1word(*p, init_val);
-#endif /* RTE_MACHINE_CPUFLAG_SSE4_2 */
+#endif
return init_val;
}
--
1.9.1
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