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net/mlx5: fix imissed statistics

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The imissed port statistic counts packets that were dropped by the
device Rx queues.

In mlx5, the imissed counter summarizes 2 counters:
	- packets dropped by the SW queue handling counted by SW.
	- packets dropped by the HW queues due to "out of buffer" events
	  detected when no SW buffer is available for the incoming
	  packets.

There is HW counter object that should be created per device, and all
the Rx queues should be assigned to this counter in configuration time.

This part was missed when the Rx queues were created by DevX what
remained the "out of buffer" counter clean forever in this case.

Add 2 options to assign the DevX Rx queues to queue counter:
	- Create queue counter per device by DevX and assign all the
	  queues to it.
	- Query the kernel counter and assign all the queues to it.

Use the first option by default and if it is failed, fallback to the
second option.

Fixes: e79c9be915 ("net/mlx5: support Rx hairpin queues")
Fixes: dc9ceff73c ("net/mlx5: create advanced RxQ via DevX")
Cc: stable@dpdk.org

Signed-off-by: Matan Azrad <matan@nvidia.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo@nvidia.com>
This commit is contained in:
Matan Azrad 2021-02-25 10:45:01 +00:00 committed by Raslan Darawsheh
parent 750e48c7d8
commit e6988afdc7
4 changed files with 60 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

52
drivers/net/mlx5/linux/mlx5_os.c
View File

@ -645,6 +645,53 @@ mlx5_flow_counter_mode_config(struct rte_eth_dev *dev __rte_unused)
#endif
}
static void
mlx5_queue_counter_id_prepare(struct rte_eth_dev *dev)
{
struct mlx5_priv *priv = dev->data->dev_private;
void *ctx = priv->sh->ctx;
priv->q_counters = mlx5_devx_cmd_queue_counter_alloc(ctx);
if (!priv->q_counters) {
struct ibv_cq *cq = mlx5_glue->create_cq(ctx, 1, NULL, NULL, 0);
struct ibv_wq *wq;
DRV_LOG(DEBUG, "Port %d queue counter object cannot be created "
"by DevX - fall-back to use the kernel driver global "
"queue counter.", dev->data->port_id);
/* Create WQ by kernel and query its queue counter ID. */
if (cq) {
wq = mlx5_glue->create_wq(ctx,
&(struct ibv_wq_init_attr){
.wq_type = IBV_WQT_RQ,
.max_wr = 1,
.max_sge = 1,
.pd = priv->sh->pd,
.cq = cq,
});
if (wq) {
/* Counter is assigned only on RDY state. */
int ret = mlx5_glue->modify_wq(wq,
&(struct ibv_wq_attr){
.attr_mask = IBV_WQ_ATTR_STATE,
.wq_state = IBV_WQS_RDY,
});
if (ret == 0)
mlx5_devx_cmd_wq_query(wq,
&priv->counter_set_id);
claim_zero(mlx5_glue->destroy_wq(wq));
}
claim_zero(mlx5_glue->destroy_cq(cq));
}
} else {
priv->counter_set_id = priv->q_counters->id;
}
if (priv->counter_set_id == 0)
DRV_LOG(INFO, "Part of the port %d statistics will not be "
"available.", dev->data->port_id);
}
/**
* Spawn an Ethernet device from Verbs information.
*
@ -1498,6 +1545,7 @@ mlx5_dev_spawn(struct rte_device *dpdk_dev,
/* Use specific wrappers for Tx object. */
priv->obj_ops.txq_obj_new = mlx5_os_txq_obj_new;
priv->obj_ops.txq_obj_release = mlx5_os_txq_obj_release;
mlx5_queue_counter_id_prepare(eth_dev);
} else {
priv->obj_ops = ibv_obj_ops;
@ -2433,6 +2481,10 @@ mlx5_os_read_dev_stat(struct mlx5_priv *priv, const char *ctr_name,
int fd;
if (priv->sh) {
if (priv->q_counters != NULL &&
strcmp(ctr_name, "out_of_buffer") == 0)
return mlx5_devx_cmd_queue_counter_query(priv->sh->ctx,
0, (uint32_t *)stat);
MKSTR(path, "%s/ports/%d/hw_counters/%s",
priv->sh->ibdev_path,
priv->dev_port,

4
drivers/net/mlx5/mlx5.c
View File

@ -1345,6 +1345,10 @@ mlx5_dev_close(struct rte_eth_dev *dev)
priv->txqs = NULL;
}
mlx5_proc_priv_uninit(dev);
if (priv->q_counters) {
mlx5_devx_cmd_destroy(priv->q_counters);
priv->q_counters = NULL;
}
if (priv->drop_queue.hrxq)
mlx5_drop_action_destroy(dev);
if (priv->mreg_cp_tbl)

2
drivers/net/mlx5/mlx5.h
View File

@ -984,6 +984,8 @@ struct mlx5_priv {
LIST_HEAD(fdir, mlx5_fdir_flow) fdir_flows; /* fdir flows. */
rte_spinlock_t shared_act_sl; /* Shared actions spinlock. */
uint32_t rss_shared_actions; /* RSS shared actions. */
struct mlx5_devx_obj *q_counters; /* DevX queue counter object. */
uint32_t counter_set_id; /* Queue counter ID to set in DevX objects. */
};
#define PORT_ID(priv) ((priv)->dev_data->port_id)

2
drivers/net/mlx5/mlx5_devx.c
View File

@ -275,6 +275,7 @@ mlx5_rxq_create_devx_rq_resources(struct rte_eth_dev *dev, uint16_t idx)
MLX5_WQ_END_PAD_MODE_ALIGN :
MLX5_WQ_END_PAD_MODE_NONE;
rq_attr.wq_attr.pd = priv->sh->pdn;
rq_attr.counter_set_id = priv->counter_set_id;
/* Create RQ using DevX API. */
return mlx5_devx_rq_create(priv->sh->ctx, &rxq_ctrl->obj->rq_obj,
wqe_size, log_desc_n, &rq_attr,
@ -438,6 +439,7 @@ mlx5_rxq_obj_hairpin_new(struct rte_eth_dev *dev, uint16_t idx)
attr.wq_attr.log_hairpin_num_packets =
attr.wq_attr.log_hairpin_data_sz -
MLX5_HAIRPIN_QUEUE_STRIDE;
attr.counter_set_id = priv->counter_set_id;
tmpl->rq = mlx5_devx_cmd_create_rq(priv->sh->ctx, &attr,
rxq_ctrl->socket);
if (!tmpl->rq) {