From: Chas Williams <3chas3@gmail.com>
To: fengchengwen <fengchengwen@huawei.com>,
Ferruh Yigit <ferruh.yigit@xilinx.com>,
thomas@monjalon.net, andrew.rybchenko@oktetlabs.ru,
konstantin.ananyev@intel.com
Cc: dev@dpdk.org, chas3@att.com, humin29@huawei.com
Subject: Re: [PATCH v2 1/3] net/bonding: support Tx prepare
Date: Wed, 14 Sep 2022 12:59:33 -0400 [thread overview]
Message-ID: <6c91f993-b11d-987c-6d20-38ee11f9f9db@gmail.com> (raw)
In-Reply-To: <4b4af3e8-710a-ae75-8171-331ebfe4e4f7@huawei.com>
On 9/13/22 20:46, fengchengwen wrote:
>
> The main problem is hard to design a tx_prepare for bonding device:
> 1. as Chas Williams said, there maybe twice hash calc to get target slave
> devices.
> 2. also more important, if the slave devices have changes(e.g. slave device
> link down or remove), and if the changes happens between bond-tx-prepare and
> bond-tx-burst, the output slave will changes, and this may lead to checksum
> failed. (Note: a bond device with slave devices may from different vendors,
> and slave devices may have different requirements, e.g. slave-A support calc
> IPv4 pseudo-head automatic (no need driver pre-calc), but slave-B need driver
> pre-calc).
>
> Current design cover the above two scenarios by using in-place tx-prepare. and
> in addition, bond devices are not transparent to applications, I think it's a
> practical method to provide tx-prepare support in this way.
>
I don't think you need to export an enable/disable routine for the use of
rte_eth_tx_prepare. It's safe to just call that routine, even if it isn't
implemented. You are just trading one branch in DPDK librte_eth_dev for a
branch in drivers/net/bonding.
I think you missed fixing tx_machine in 802.3ad support. We have been using
the following patch locally which I never got around to submitting.
From a458654d68ff5144266807ef136ac3dd2adfcd98 Mon Sep 17 00:00:00 2001
From: "Charles (Chas) Williams" <chwillia@ciena.com>
Date: Tue, 3 May 2022 16:52:37 -0400
Subject: [PATCH] net/bonding: call rte_eth_tx_prepare before rte_eth_tx_burst
Some PMDs might require a call to rte_eth_tx_prepare before sending the
packets for transmission. Typically, the prepare step handles the VLAN
headers, but it may need to do other things.
Signed-off-by: Chas Williams <chwillia@ciena.com>
---
drivers/net/bonding/rte_eth_bond_8023ad.c | 16 +++++++-
drivers/net/bonding/rte_eth_bond_pmd.c | 50 +++++++++++++++++++----
2 files changed, 55 insertions(+), 11 deletions(-)
diff --git a/drivers/net/bonding/rte_eth_bond_8023ad.c b/drivers/net/bonding/rte_eth_bond_8023ad.c
index b3cddd8a20..0680be8c06 100644
--- a/drivers/net/bonding/rte_eth_bond_8023ad.c
+++ b/drivers/net/bonding/rte_eth_bond_8023ad.c
@@ -636,9 +636,15 @@ tx_machine(struct bond_dev_private *internals, uint16_t slave_id)
return;
}
} else {
- uint16_t pkts_sent = rte_eth_tx_burst(slave_id,
+ uint16_t pkts_sent;
+ uint16_t nb_prep;
+
+ nb_prep = rte_eth_tx_prepare(slave_id,
internals->mode4.dedicated_queues.tx_qid,
&lacp_pkt, 1);
+ pkts_sent = rte_eth_tx_burst(slave_id,
+ internals->mode4.dedicated_queues.tx_qid,
+ &lacp_pkt, nb_prep);
if (pkts_sent != 1) {
rte_pktmbuf_free(lacp_pkt);
set_warning_flags(port, WRN_TX_QUEUE_FULL);
@@ -1371,9 +1377,15 @@ bond_mode_8023ad_handle_slow_pkt(struct bond_dev_private *internals,
}
} else {
/* Send packet directly to the slow queue */
- uint16_t tx_count = rte_eth_tx_burst(slave_id,
+ uint16_t tx_count;
+ uint16_t nb_prep;
+
+ nb_prep = rte_eth_tx_prepare(slave_id,
internals->mode4.dedicated_queues.tx_qid,
&pkt, 1);
+ tx_count = rte_eth_tx_burst(slave_id,
+ internals->mode4.dedicated_queues.tx_qid,
+ &pkt, nb_prep);
if (tx_count != 1) {
/* reset timer */
port->rx_marker_timer = 0;
diff --git a/drivers/net/bonding/rte_eth_bond_pmd.c b/drivers/net/bonding/rte_eth_bond_pmd.c
index b305b6a35b..c27073e66f 100644
--- a/drivers/net/bonding/rte_eth_bond_pmd.c
+++ b/drivers/net/bonding/rte_eth_bond_pmd.c
@@ -602,8 +602,12 @@ bond_ethdev_tx_burst_round_robin(void *queue, struct rte_mbuf **bufs,
/* Send packet burst on each slave device */
for (i = 0; i < num_of_slaves; i++) {
if (slave_nb_pkts[i] > 0) {
- num_tx_slave = rte_eth_tx_burst(slaves[i], bd_tx_q->queue_id,
+ uint16_t nb_prep;
+
+ nb_prep = rte_eth_tx_prepare(slaves[i], bd_tx_q->queue_id,
slave_bufs[i], slave_nb_pkts[i]);
+ num_tx_slave = rte_eth_tx_burst(slaves[i], bd_tx_q->queue_id,
+ slave_bufs[i], nb_prep);
/* if tx burst fails move packets to end of bufs */
if (unlikely(num_tx_slave < slave_nb_pkts[i])) {
@@ -628,6 +632,7 @@ bond_ethdev_tx_burst_active_backup(void *queue,
{
struct bond_dev_private *internals;
struct bond_tx_queue *bd_tx_q;
+ uint16_t nb_prep;
bd_tx_q = (struct bond_tx_queue *)queue;
internals = bd_tx_q->dev_private;
@@ -635,8 +640,10 @@ bond_ethdev_tx_burst_active_backup(void *queue,
if (internals->active_slave_count < 1)
return 0;
- return rte_eth_tx_burst(internals->current_primary_port, bd_tx_q->queue_id,
- bufs, nb_pkts);
+ nb_prep = rte_eth_tx_prepare(internals->current_primary_port,
+ bd_tx_q->queue_id, bufs, nb_pkts);
+ return rte_eth_tx_burst(internals->current_primary_port,
+ bd_tx_q->queue_id, bufs, nb_prep);
}
static inline uint16_t
@@ -935,6 +942,8 @@ bond_ethdev_tx_burst_tlb(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
}
for (i = 0; i < num_of_slaves; i++) {
+ uint16_t nb_prep;
+
rte_eth_macaddr_get(slaves[i], &active_slave_addr);
for (j = num_tx_total; j < nb_pkts; j++) {
if (j + 3 < nb_pkts)
@@ -951,8 +960,10 @@ bond_ethdev_tx_burst_tlb(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
#endif
}
- num_tx_total += rte_eth_tx_burst(slaves[i], bd_tx_q->queue_id,
+ nb_prep = rte_eth_tx_prepare(slaves[i], bd_tx_q->queue_id,
bufs + num_tx_total, nb_pkts - num_tx_total);
+ num_tx_total += rte_eth_tx_burst(slaves[i], bd_tx_q->queue_id,
+ bufs + num_tx_total, nb_prep);
if (num_tx_total == nb_pkts)
break;
@@ -1064,8 +1075,12 @@ bond_ethdev_tx_burst_alb(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
/* Send ARP packets on proper slaves */
for (i = 0; i < RTE_MAX_ETHPORTS; i++) {
if (slave_bufs_pkts[i] > 0) {
- num_send = rte_eth_tx_burst(i, bd_tx_q->queue_id,
+ uint16_t nb_prep;
+
+ nb_prep = rte_eth_tx_prepare(i, bd_tx_q->queue_id,
slave_bufs[i], slave_bufs_pkts[i]);
+ num_send = rte_eth_tx_burst(i, bd_tx_q->queue_id,
+ slave_bufs[i], nb_prep);
for (j = 0; j < slave_bufs_pkts[i] - num_send; j++) {
bufs[nb_pkts - 1 - num_not_send - j] =
slave_bufs[i][nb_pkts - 1 - j];
@@ -1088,8 +1103,12 @@ bond_ethdev_tx_burst_alb(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
/* Send update packets on proper slaves */
for (i = 0; i < RTE_MAX_ETHPORTS; i++) {
if (update_bufs_pkts[i] > 0) {
- num_send = rte_eth_tx_burst(i, bd_tx_q->queue_id, update_bufs[i],
+ uint16_t nb_prep;
+
+ nb_prep = rte_eth_tx_prepare(i, bd_tx_q->queue_id, update_bufs[i],
update_bufs_pkts[i]);
+ num_send = rte_eth_tx_burst(i, bd_tx_q->queue_id, update_bufs[i],
+ nb_prep);
for (j = num_send; j < update_bufs_pkts[i]; j++) {
rte_pktmbuf_free(update_bufs[i][j]);
}
@@ -1155,12 +1174,17 @@ tx_burst_balance(void *queue, struct rte_mbuf **bufs, uint16_t nb_bufs,
/* Send packet burst on each slave device */
for (i = 0; i < slave_count; i++) {
+ uint16_t nb_prep;
+
if (slave_nb_bufs[i] == 0)
continue;
- slave_tx_count = rte_eth_tx_burst(slave_port_ids[i],
+ nb_prep = rte_eth_tx_prepare(slave_port_ids[i],
bd_tx_q->queue_id, slave_bufs[i],
slave_nb_bufs[i]);
+ slave_tx_count = rte_eth_tx_burst(slave_port_ids[i],
+ bd_tx_q->queue_id, slave_bufs[i],
+ nb_prep);
total_tx_count += slave_tx_count;
@@ -1243,8 +1267,12 @@ tx_burst_8023ad(void *queue, struct rte_mbuf **bufs, uint16_t nb_bufs,
if (rte_ring_dequeue(port->tx_ring,
(void **)&ctrl_pkt) != -ENOENT) {
- slave_tx_count = rte_eth_tx_burst(slave_port_ids[i],
+ uint16_t nb_prep;
+
+ nb_prep = rte_eth_tx_prepare(slave_port_ids[i],
bd_tx_q->queue_id, &ctrl_pkt, 1);
+ slave_tx_count = rte_eth_tx_burst(slave_port_ids[i],
+ bd_tx_q->queue_id, &ctrl_pkt, nb_prep);
/*
* re-enqueue LAG control plane packets to buffering
* ring if transmission fails so the packet isn't lost.
@@ -1322,8 +1350,12 @@ bond_ethdev_tx_burst_broadcast(void *queue, struct rte_mbuf **bufs,
/* Transmit burst on each active slave */
for (i = 0; i < num_of_slaves; i++) {
- slave_tx_total[i] = rte_eth_tx_burst(slaves[i], bd_tx_q->queue_id,
+ uint16_t nb_prep;
+
+ nb_prep = rte_eth_tx_prepare(slaves[i], bd_tx_q->queue_id,
bufs, nb_pkts);
+ slave_tx_total[i] = rte_eth_tx_burst(slaves[i], bd_tx_q->queue_id,
+ bufs, nb_prep);
if (unlikely(slave_tx_total[i] < nb_pkts))
tx_failed_flag = 1;
--
2.30.2
next prev parent reply other threads:[~2022-09-14 16:59 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-16 11:04 [dpdk-dev] [RFC 0/2] add Tx prepare support for bonding device Chengchang Tang
2021-04-16 11:04 ` [dpdk-dev] [RFC 1/2] net/bonding: add Tx prepare for bonding Chengchang Tang
2021-04-16 11:04 ` [dpdk-dev] [RFC 2/2] app/testpmd: add cmd for bonding Tx prepare Chengchang Tang
2021-04-16 11:12 ` [dpdk-dev] [RFC 0/2] add Tx prepare support for bonding device Min Hu (Connor)
2021-04-20 1:26 ` Ferruh Yigit
2021-04-20 2:44 ` Chengchang Tang
2021-04-20 8:33 ` Ananyev, Konstantin
2021-04-20 12:44 ` Chengchang Tang
2021-04-20 13:18 ` Ananyev, Konstantin
2021-04-20 14:06 ` Chengchang Tang
2021-04-23 9:46 ` [dpdk-dev] [PATCH " Chengchang Tang
2021-04-23 9:46 ` [dpdk-dev] [PATCH 1/2] net/bonding: support Tx prepare for bonding Chengchang Tang
2021-06-08 9:49 ` Andrew Rybchenko
2021-06-09 6:42 ` Chengchang Tang
2021-06-09 9:35 ` Andrew Rybchenko
2021-06-10 7:32 ` Chengchang Tang
2021-06-14 14:16 ` Andrew Rybchenko
2021-06-09 10:25 ` Ananyev, Konstantin
2021-06-10 6:46 ` Chengchang Tang
2021-06-14 11:36 ` Ananyev, Konstantin
2022-05-24 12:11 ` Min Hu (Connor)
2022-07-25 4:08 ` [PATCH v2 0/3] add Tx prepare support for bonding driver Chengwen Feng
2022-07-25 4:08 ` [PATCH v2 1/3] net/bonding: support Tx prepare Chengwen Feng
2022-09-13 10:22 ` Ferruh Yigit
2022-09-13 15:08 ` Chas Williams
2022-09-14 0:46 ` fengchengwen
2022-09-14 16:59 ` Chas Williams [this message]
2022-09-17 2:35 ` fengchengwen
2022-09-17 13:38 ` Chas Williams
2022-09-19 14:07 ` Konstantin Ananyev
2022-09-19 23:02 ` Chas Williams
2022-09-22 2:12 ` fengchengwen
2022-09-25 10:32 ` Chas Williams
2022-09-26 10:18 ` Konstantin Ananyev
2022-09-26 16:36 ` Chas Williams
2022-07-25 4:08 ` [PATCH v2 2/3] net/bonding: support Tx prepare fail stats Chengwen Feng
2022-07-25 4:08 ` [PATCH v2 3/3] net/bonding: add testpmd cmd for Tx prepare Chengwen Feng
2022-07-25 7:04 ` [PATCH v2 0/3] add Tx prepare support for bonding driver humin (Q)
2022-09-13 1:41 ` fengchengwen
2022-09-17 4:15 ` [PATCH v3 " Chengwen Feng
2022-09-17 4:15 ` [PATCH v3 1/3] net/bonding: support Tx prepare Chengwen Feng
2022-09-17 4:15 ` [PATCH v3 2/3] net/bonding: support Tx prepare fail stats Chengwen Feng
2022-09-17 4:15 ` [PATCH v3 3/3] net/bonding: add testpmd cmd for Tx prepare Chengwen Feng
2022-10-09 3:36 ` [PATCH v4] net/bonding: call Tx prepare before Tx burst Chengwen Feng
2022-10-10 19:42 ` Chas Williams
2022-10-11 13:28 ` fengchengwen
2022-10-11 13:20 ` [PATCH v5] " Chengwen Feng
2022-10-15 15:26 ` Chas Williams
2022-10-18 14:25 ` fengchengwen
2022-10-20 7:07 ` Andrew Rybchenko
2021-04-23 9:46 ` [dpdk-dev] [PATCH 2/2] net/bonding: support configuring Tx offloading for bonding Chengchang Tang
2021-06-08 9:49 ` Andrew Rybchenko
2021-06-09 6:57 ` Chengchang Tang
2021-06-09 9:11 ` Ananyev, Konstantin
2021-06-09 9:37 ` Andrew Rybchenko
2021-06-10 6:29 ` Chengchang Tang
2021-06-14 11:05 ` Ananyev, Konstantin
2021-06-14 14:13 ` Andrew Rybchenko
2021-04-30 6:26 ` [dpdk-dev] [PATCH 0/2] add Tx prepare support for bonding device Chengchang Tang
2021-04-30 6:47 ` Min Hu (Connor)
2021-06-03 1:44 ` Chengchang Tang
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