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Use hardware computed Toeplitz hash for incoming flowids

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Use the Toeplitz hash value as source for the flowid. This makes the
hash value more suitable for so-called hash bucket algorithms which
are used in the FreeBSD's TCP/IP stack when RSS is enabled.

Sponsored by:	Mellanox Technologies
MFC after:	1 week
This commit is contained in:
Hans Petter Selasky 2016-03-15 15:53:37 +00:00
parent 9319562b86
commit 1f20c68e07
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=296910
2 changed files with 3 additions and 2 deletions
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3
sys/ofed/drivers/net/mlx4/en_rx.c
View File

@ -616,7 +616,8 @@ int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud
goto next;
}
mb->m_pkthdr.flowid = cq->ring;
/* forward Toeplitz compatible hash value */
mb->m_pkthdr.flowid = be32_to_cpu(cqe->immed_rss_invalid);
M_HASHTYPE_SET(mb, M_HASHTYPE_OPAQUE);
mb->m_pkthdr.rcvif = dev;
if (be32_to_cpu(cqe->vlan_my_qpn) &

2
sys/ofed/drivers/net/mlx4/en_tx.c
View File

@ -1060,7 +1060,7 @@ mlx4_en_transmit(struct ifnet *dev, struct mbuf *m)
/* Compute which queue to use */
if (M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) {
i = m->m_pkthdr.flowid % priv->tx_ring_num;
i = (m->m_pkthdr.flowid % 128) % priv->tx_ring_num;
}
else {
i = mlx4_en_select_queue(dev, m);