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dpif-netdev/mfex: Add ipv6 profile based hashing.

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For packets which don't already have a hash calculated,
miniflow_hash_5tuple() calculates the hash of a packet
using the previously built miniflow.

This commit adds IPv6 profile specific hashing which
uses fixed offsets into the packet to improve hashing
performance.

Signed-off-by: Kumar Amber <kumar.amber@intel.com>
Acked-by: Harry van Haaren <harry.van.haaren@intel.com>
Signed-off-by: Ian Stokes <ian.stokes@intel.com>
This commit is contained in:
Kumar Amber
2022-07-01 17:58:38 +05:30
committed by Ian Stokes
parent 8cab30a9d2
commit b80f58cde2
3 changed files with 51 additions and 4 deletions
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43
lib/dp-packet.h
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@@ -1117,6 +1117,49 @@ dp_packet_update_rss_hash_ipv4_tcp_udp(struct dp_packet *packet)
dp_packet_set_rss_hash(packet, hash);
}
static inline void ALWAYS_INLINE
dp_packet_update_rss_hash_ipv6_tcp_udp(struct dp_packet *packet)
{
if (dp_packet_rss_valid(packet)) {
return;
}
const uint8_t *pkt = dp_packet_data(packet);
const uint16_t l3_ofs = packet->l3_ofs;
uint32_t ipv6_src_off = offsetof(struct ovs_16aligned_ip6_hdr, ip6_src);
uint32_t ipv6_dst_off = offsetof(struct ovs_16aligned_ip6_hdr, ip6_dst);
uint32_t ipv6_proto_off = offsetof(struct ovs_16aligned_ip6_hdr,
ip6_ctlun.ip6_un1.ip6_un1_nxt);
const void *ipv6_src_l = &pkt[l3_ofs + ipv6_src_off];
const void *ipv6_src_h = &pkt[l3_ofs + ipv6_src_off + 8];
const void *ipv6_dst_l = &pkt[l3_ofs + ipv6_dst_off];
const void *ipv6_dst_h = &pkt[l3_ofs + ipv6_dst_off + 8];
const void *l4_ports = &pkt[packet->l4_ofs];
uint64_t ipv6_src_lo, ipv6_src_hi;
uint64_t ipv6_dst_lo, ipv6_dst_hi;
uint32_t ports;
uint32_t hash = 0;
memcpy(&ipv6_src_lo, ipv6_src_l, sizeof ipv6_src_lo);
memcpy(&ipv6_src_hi, ipv6_src_h, sizeof ipv6_src_hi);
memcpy(&ipv6_dst_lo, ipv6_dst_l, sizeof ipv6_dst_lo);
memcpy(&ipv6_dst_hi, ipv6_dst_h, sizeof ipv6_dst_hi);
memcpy(&ports, l4_ports, sizeof ports);
/* IPv6 Src and Dst. */
hash = hash_add64(hash, ipv6_src_lo);
hash = hash_add64(hash, ipv6_src_hi);
hash = hash_add64(hash, ipv6_dst_lo);
hash = hash_add64(hash, ipv6_dst_hi);
/* IPv6 proto. */
hash = hash_add(hash, pkt[l3_ofs + ipv6_proto_off]);
/* L4 ports. */
hash = hash_add(hash, ports);
hash = hash_finish(hash, 42);
dp_packet_set_rss_hash(packet, hash);
}
#ifdef __cplusplus
}
#endif