[dpdk-dev] [PATCH v4] net/bonding: per-slave intermediate rx ring
Matan Azrad
matan at mellanox.com
Tue Aug 21 12:56:01 CEST 2018
Hi
From: Chas Williams
> This will need to be implemented for some of the other RX burst methods at
> some point for other modes to see this performance improvement (with the
> exception of active-backup).
Yes, I think it should be done at least to bond_ethdev_rx_burst_8023ad_fast_queue (should be easy) for now.
> On Thu, Aug 16, 2018 at 9:32 AM Luca Boccassi <bluca at debian.org> wrote:
>
> > During bond 802.3ad receive, a burst of packets is fetched from each
> > slave into a local array and appended to per-slave ring buffer.
> > Packets are taken from the head of the ring buffer and returned to the
> > caller. The number of mbufs provided to each slave is sufficient to
> > meet the requirements of the ixgbe vector receive.
Luca,
Can you explain these requirements of ixgbe?
Did you check for other vendor PMDs? It may hurt performance there..
> >
> > This small change improves performances of the bonding driver
> > considerably. Vyatta has been using it for years in production.
> >
> > Cc: stable at dpdk.org
> >
> > Signed-off-by: Eric Kinzie <ekinzie at brocade.com>
> > Signed-off-by: Luca Boccassi <bluca at debian.org>
> >
>
> Acked-by: Chas Williams <chas3 at att.com>
>
>
>
> > ---
> > v2 and v3: fix checkpatch warnings
> > v4: add Eric's original signed-off-by from the Vyatta internal repo
> >
> > drivers/net/bonding/rte_eth_bond_api.c | 13 +++
> > drivers/net/bonding/rte_eth_bond_pmd.c | 98 +++++++++++++++++--
> ---
> > drivers/net/bonding/rte_eth_bond_private.h | 4 +
> > 3 files changed, 95 insertions(+), 20 deletions(-)
> >
> > diff --git a/drivers/net/bonding/rte_eth_bond_api.c
> > b/drivers/net/bonding/rte_eth_bond_api.c
> > index 8bc04cfd11..3d22203e91 100644
> > --- a/drivers/net/bonding/rte_eth_bond_api.c
> > +++ b/drivers/net/bonding/rte_eth_bond_api.c
> > @@ -524,6 +524,10 @@ __eth_bond_slave_remove_lock_free(uint16_t
> > bonded_port_id,
> >
> > sizeof(*(rte_eth_devices[bonded_port_id].data->mac_addrs)));
> > }
> > if (internals->slave_count == 0) {
> > + /* Remove any remaining packets in the receive ring */
> > + struct rte_mbuf *bufs[PMD_BOND_RECV_PKTS_PER_SLAVE];
> > + unsigned int j, count;
> > +
> > internals->rx_offload_capa = 0;
> > internals->tx_offload_capa = 0;
> > internals->rx_queue_offload_capa = 0; @@ -532,6
> > +536,15 @@ __eth_bond_slave_remove_lock_free(uint16_t
> > bonded_port_id,
> > internals->reta_size = 0;
> > internals->candidate_max_rx_pktlen = 0;
> > internals->max_rx_pktlen = 0;
> > +
> > + do {
> > + count = rte_ring_dequeue_burst(internals->rx_ring,
> > + (void **)bufs,
> > + PMD_BOND_RECV_PKTS_PER_SLAVE,
> > + NULL);
> > + for (j = 0; j < count; j++)
> > + rte_pktmbuf_free(bufs[j]);
> > + } while (count > 0);
> > }
> > return 0;
> > }
> > diff --git a/drivers/net/bonding/rte_eth_bond_pmd.c
> > b/drivers/net/bonding/rte_eth_bond_pmd.c
> > index 58f7377c60..ae756c4e3a 100644
> > --- a/drivers/net/bonding/rte_eth_bond_pmd.c
> > +++ b/drivers/net/bonding/rte_eth_bond_pmd.c
> > @@ -18,6 +18,8 @@
> > #include <rte_alarm.h>
> > #include <rte_cycles.h>
> > #include <rte_string_fns.h>
> > +#include <rte_errno.h>
> > +#include <rte_lcore.h>
> >
> > #include "rte_eth_bond.h"
> > #include "rte_eth_bond_private.h"
> > @@ -402,10 +404,15 @@ bond_ethdev_rx_burst_8023ad(void *queue,
> struct
> > rte_mbuf **bufs,
> > struct bond_dev_private *internals = bd_rx_q->dev_private;
> > struct ether_addr bond_mac;
> >
> > + unsigned int rx_ring_avail =
> > rte_ring_free_count(internals->rx_ring);
> > + struct rte_mbuf
> *mbuf_bounce[PMD_BOND_RECV_PKTS_PER_SLAVE];
> > +
> > struct ether_hdr *hdr;
> >
> > const uint16_t ether_type_slow_be =
> > rte_be_to_cpu_16(ETHER_TYPE_SLOW);
> > uint16_t num_rx_total = 0; /* Total number of received
> > packets */
> > + uint16_t num_rx_slave;
> > + uint16_t num_enq_slave;
> > uint16_t slaves[RTE_MAX_ETHPORTS];
> > uint16_t slave_count, idx;
> >
> > @@ -414,6 +421,9 @@ bond_ethdev_rx_burst_8023ad(void *queue,
> struct
> > rte_mbuf **bufs,
> > uint8_t i, j, k;
> > uint8_t subtype;
> >
> > + if (rx_ring_avail < PMD_BOND_RECV_PKTS_PER_SLAVE)
> > + goto dequeue;
> > +
> > rte_eth_macaddr_get(internals->port_id, &bond_mac);
> > /* Copy slave list to protect against slave up/down changes
> > during tx
> > * bursting */
> > @@ -426,62 +436,96 @@ bond_ethdev_rx_burst_8023ad(void *queue,
> struct
> > rte_mbuf **bufs,
> > internals->active_slave = 0;
> > idx = 0;
> > }
> > - for (i = 0; i < slave_count && num_rx_total < nb_pkts; i++) {
> > - j = num_rx_total;
> > + for (i = 0; i < slave_count && num_rx_total < rx_ring_avail; i++) {
> > + j = 0;
> > collecting = ACTOR_STATE(&mode_8023ad_ports[slaves[idx]],
> > COLLECTING);
> >
> > /* Read packets from this slave */
> > - num_rx_total += rte_eth_rx_burst(slaves[idx],
> > bd_rx_q->queue_id,
> > - &bufs[num_rx_total], nb_pkts -
> > num_rx_total);
> > + if (unlikely(rx_ring_avail - num_rx_total <
> > + PMD_BOND_RECV_PKTS_PER_SLAVE))
> > + continue;
> > + num_rx_slave = rte_eth_rx_burst(slaves[idx],
> > bd_rx_q->queue_id,
> > + mbuf_bounce,
> > + PMD_BOND_RECV_PKTS_PER_SLAVE);
> >
> > - for (k = j; k < 2 && k < num_rx_total; k++)
> > - rte_prefetch0(rte_pktmbuf_mtod(bufs[k], void *));
> > + for (k = j; k < 2 && k < num_rx_slave; k++)
> > + rte_prefetch0(rte_pktmbuf_mtod(mbuf_bounce[k],
> > void *));
> >
> > /* Handle slow protocol packets. */
> > - while (j < num_rx_total) {
> > + while (j < num_rx_slave) {
> >
> > /* If packet is not pure L2 and is known, skip
> > it */
> > - if ((bufs[j]->packet_type & ~RTE_PTYPE_L2_ETHER)
> > != 0) {
> > + if ((mbuf_bounce[j]->packet_type &
> > ~RTE_PTYPE_L2_ETHER) != 0) {
> > j++;
> > continue;
> > }
> >
> > - if (j + 3 < num_rx_total)
> > - rte_prefetch0(rte_pktmbuf_mtod(bufs[j +
> > 3], void *));
> > + if (j + 3 < num_rx_slave)
> > +
> > rte_prefetch0(rte_pktmbuf_mtod(mbuf_bounce[j + 3],
> > + void
> > + *));
> >
> > - hdr = rte_pktmbuf_mtod(bufs[j], struct ether_hdr
> > *);
> > + hdr = rte_pktmbuf_mtod(mbuf_bounce[j],
> > + struct ether_hdr *);
> > subtype = ((struct slow_protocol_frame
> > *)hdr)->slow_protocol.subtype;
> >
> > /* Remove packet from array if it is slow
> > packet or slave is not
> > * in collecting state or bonding interface is
> > not in promiscuous
> > * mode and packet address does not match. */
> > - if (unlikely(is_lacp_packets(hdr->ether_type,
> > subtype, bufs[j]) ||
> > + if (unlikely(is_lacp_packets(hdr->ether_type,
> > + subtype,
> > mbuf_bounce[j]) ||
> > !collecting || (!promisc &&
> >
> > !is_multicast_ether_addr(&hdr->d_addr) &&
> > !is_same_ether_addr(&bond_mac,
> > &hdr->d_addr)))) {
> >
> > if (hdr->ether_type ==
> > ether_type_slow_be) {
> > bond_mode_8023ad_handle_slow_pkt(
> > - internals, slaves[idx],
> > bufs[j]);
> > + internals, slaves[idx],
> > + mbuf_bounce[j]);
> > } else
> > - rte_pktmbuf_free(bufs[j]);
> > +
> > + rte_pktmbuf_free(mbuf_bounce[j]);
> >
> > /* Packet is managed by mode 4 or
> > dropped, shift the array */
> > - num_rx_total--;
> > - if (j < num_rx_total) {
> > - memmove(&bufs[j], &bufs[j + 1],
> > sizeof(bufs[0]) *
> > - (num_rx_total - j));
> > + num_rx_slave--;
> > + if (j < num_rx_slave) {
> > + memmove(&mbuf_bounce[j],
> > + &mbuf_bounce[j + 1],
> > + sizeof(mbuf_bounce[0]) *
> > + (num_rx_slave - j));
> > }
> > - } else
> > + } else {
> > j++;
> > + }
> > }
> > +
> > + if (num_rx_slave > 0) {
> > + if (mbuf_bounce[0] == NULL)
> > + RTE_LOG(ERR, PMD, "%s: Enqueue a NULL??\n",
> > + __func__);
> > +
> > + num_enq_slave =
> > rte_ring_enqueue_burst(internals->rx_ring,
> > + (void
> > **)mbuf_bounce,
> > +
> > num_rx_slave,
> > + NULL);
> > +
> > + if (num_enq_slave < num_rx_slave) {
> > + RTE_LOG(ERR, PMD,
> > + "%s: failed to enqueue %u packets",
> > + __func__,
> > + (num_rx_slave - num_enq_slave));
> > + for (j = num_enq_slave; j <
> > + num_rx_slave;
> > j++)
> > + rte_pktmbuf_free(mbuf_bounce[j]);
> > + }
> > + num_rx_total += num_enq_slave;
> > + }
> > +
> > if (unlikely(++idx == slave_count))
> > idx = 0;
> > }
> >
> > internals->active_slave = idx;
> > - return num_rx_total;
> > +dequeue:
> > + return rte_ring_dequeue_burst(internals->rx_ring, (void **)bufs,
> > + nb_pkts, NULL);
> > }
> >
> > #if defined(RTE_LIBRTE_BOND_DEBUG_ALB) ||
> > defined(RTE_LIBRTE_BOND_DEBUG_ALB_L1)
> > @@ -3065,6 +3109,7 @@ bond_alloc(struct rte_vdev_device *dev, uint8_t
> mode)
> > struct bond_dev_private *internals = NULL;
> > struct rte_eth_dev *eth_dev = NULL;
> > uint32_t vlan_filter_bmp_size;
> > + char mem_name[RTE_ETH_NAME_MAX_LEN];
> >
> > /* now do all data allocation - for eth_dev structure, dummy
> > pci driver
> > * and internal (private) data @@ -3129,6 +3174,19 @@
> > bond_alloc(struct rte_vdev_device *dev, uint8_t
> > mode)
> > TAILQ_INIT(&internals->flow_list);
> > internals->flow_isolated_valid = 0;
> >
> > + snprintf(mem_name, RTE_DIM(mem_name), "bond_%u_rx",
> > internals->port_id);
> > + internals->rx_ring = rte_ring_lookup(mem_name);
> > + if (internals->rx_ring == NULL) {
> > + internals->rx_ring = rte_ring_create(mem_name,
> > +
> > rte_align32pow2(PMD_BOND_RECV_RING_PKTS *
> > + rte_lcore_count()),
> > + socket_id, 0);
> > + if (internals->rx_ring == NULL)
> > + rte_panic("%s: Failed to create rx ring '%s':
> > %s\n", name,
> > + mem_name, rte_strerror(rte_errno));
> > + }
> > +
> > +
> > /* Set mode 4 default configuration */
> > bond_mode_8023ad_setup(eth_dev, NULL);
> > if (bond_ethdev_mode_set(eth_dev, mode)) { diff --git
> > a/drivers/net/bonding/rte_eth_bond_private.h
> > b/drivers/net/bonding/rte_eth_bond_private.h
> > index 43e0e448df..80261c6b14 100644
> > --- a/drivers/net/bonding/rte_eth_bond_private.h
> > +++ b/drivers/net/bonding/rte_eth_bond_private.h
> > @@ -26,6 +26,8 @@
> > #define PMD_BOND_LSC_POLL_PERIOD_KVARG
> ("lsc_poll_period_ms")
> > #define PMD_BOND_LINK_UP_PROP_DELAY_KVARG ("up_delay")
> > #define PMD_BOND_LINK_DOWN_PROP_DELAY_KVARG
> ("down_delay")
> > +#define PMD_BOND_RECV_RING_PKTS 512
> > +#define PMD_BOND_RECV_PKTS_PER_SLAVE 32
> >
> > #define PMD_BOND_XMIT_POLICY_LAYER2_KVARG ("l2")
> > #define PMD_BOND_XMIT_POLICY_LAYER23_KVARG ("l23")
> > @@ -175,6 +177,8 @@ struct bond_dev_private {
> >
> > void *vlan_filter_bmpmem; /* enabled vlan filter
> > bitmap */
> > struct rte_bitmap *vlan_filter_bmp;
> > +
> > + struct rte_ring *rx_ring;
> > };
> >
> > extern const struct eth_dev_ops default_dev_ops;
> > --
> > 2.18.0
> >
> >
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