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IB/rxe: vary the source udp port for receive scaling

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Select the source udp port number for a QP based on the
source QPN. This provides a better spread of traffic
across NIC RX queues for RC/UC QPs.

Signed-off-by: Vijay Immanuel <vijayi@attalasystems.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Vijay Immanuel 2018-07-05 18:43:47 -07:00 committed by Doug Ledford
parent 5b394b2ddf
commit d3c04a3a68
3 changed files with 15 additions and 4 deletions
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8
drivers/infiniband/sw/rxe/rxe_net.c
View File

@ -396,8 +396,8 @@ static int prepare4(struct rxe_dev *rxe, struct rxe_pkt_info *pkt,
if (!memcmp(saddr, daddr, sizeof(*daddr)))
pkt->mask |= RXE_LOOPBACK_MASK;
prepare_udp_hdr(skb, htons(RXE_ROCE_V2_SPORT),
htons(ROCE_V2_UDP_DPORT));
prepare_udp_hdr(skb, cpu_to_be16(qp->src_port),
cpu_to_be16(ROCE_V2_UDP_DPORT));
prepare_ipv4_hdr(dst, skb, saddr->s_addr, daddr->s_addr, IPPROTO_UDP,
av->grh.traffic_class, av->grh.hop_limit, df, xnet);
@ -423,8 +423,8 @@ static int prepare6(struct rxe_dev *rxe, struct rxe_pkt_info *pkt,
if (!memcmp(saddr, daddr, sizeof(*daddr)))
pkt->mask |= RXE_LOOPBACK_MASK;
prepare_udp_hdr(skb, htons(RXE_ROCE_V2_SPORT),
htons(ROCE_V2_UDP_DPORT));
prepare_udp_hdr(skb, cpu_to_be16(qp->src_port),
cpu_to_be16(ROCE_V2_UDP_DPORT));
prepare_ipv6_hdr(dst, skb, saddr, daddr, IPPROTO_UDP,
av->grh.traffic_class,

10
drivers/infiniband/sw/rxe/rxe_qp.c
View File

@ -227,6 +227,16 @@ static int rxe_qp_init_req(struct rxe_dev *rxe, struct rxe_qp *qp,
return err;
qp->sk->sk->sk_user_data = qp;
/* pick a source UDP port number for this QP based on
* the source QPN. this spreads traffic for different QPs
* across different NIC RX queues (while using a single
* flow for a given QP to maintain packet order).
* the port number must be in the Dynamic Ports range
* (0xc000 - 0xffff).
*/
qp->src_port = RXE_ROCE_V2_SPORT +
(hash_32_generic(qp_num(qp), 14) & 0x3fff);
qp->sq.max_wr = init->cap.max_send_wr;
qp->sq.max_sge = init->cap.max_send_sge;
qp->sq.max_inline = init->cap.max_inline_data;

1
drivers/infiniband/sw/rxe/rxe_verbs.h
View File

@ -248,6 +248,7 @@ struct rxe_qp {
struct socket *sk;
u32 dst_cookie;
u16 src_port;
struct rxe_av pri_av;
struct rxe_av alt_av;