提交 603e1f5b 编写于 作者: G Gal Pressman 提交者: Saeed Mahameed

net/mlx5e: Fix calculated checksum offloads counters

Instead of calculating the offloads counters, count them explicitly.
The calculations done for these counters would result in bugs in some
cases, for example:
When running TCP traffic over a VXLAN tunnel with TSO enabled the following
counters would increase:
       tx_csum_partial: 1,333,284
       tx_csum_partial_inner: 29,286
       tx4_csum_partial_inner: 384
       tx7_csum_partial_inner: 8
       tx9_csum_partial_inner: 34
       tx10_csum_partial_inner: 26,807
       tx11_csum_partial_inner: 287
       tx12_csum_partial_inner: 27
       tx16_csum_partial_inner: 6
       tx25_csum_partial_inner: 1,733

Seems like tx_csum_partial increased out of nowhere.
The issue is in the following calculation in mlx5e_update_sw_counters:
s->tx_csum_partial = s->tx_packets - tx_offload_none - s->tx_csum_partial_inner;

While tx_packets increases by the number of GSO segments for each SKB,
tx_csum_partial_inner will only increase by one, resulting in wrong
tx_csum_partial counter.

Fixes: bfe6d8d1 ("net/mlx5e: Reorganize ethtool statistics")
Signed-off-by: NGal Pressman <galp@mellanox.com>
Signed-off-by: NSaeed Mahameed <saeedm@mellanox.com>
上级 1456f69f
......@@ -184,7 +184,6 @@ static void mlx5e_update_sw_counters(struct mlx5e_priv *priv)
struct mlx5e_sw_stats temp, *s = &temp;
struct mlx5e_rq_stats *rq_stats;
struct mlx5e_sq_stats *sq_stats;
u64 tx_offload_none = 0;
int i, j;
memset(s, 0, sizeof(*s));
......@@ -199,6 +198,7 @@ static void mlx5e_update_sw_counters(struct mlx5e_priv *priv)
s->rx_lro_bytes += rq_stats->lro_bytes;
s->rx_csum_none += rq_stats->csum_none;
s->rx_csum_complete += rq_stats->csum_complete;
s->rx_csum_unnecessary += rq_stats->csum_unnecessary;
s->rx_csum_unnecessary_inner += rq_stats->csum_unnecessary_inner;
s->rx_xdp_drop += rq_stats->xdp_drop;
s->rx_xdp_tx += rq_stats->xdp_tx;
......@@ -229,14 +229,11 @@ static void mlx5e_update_sw_counters(struct mlx5e_priv *priv)
s->tx_queue_dropped += sq_stats->dropped;
s->tx_xmit_more += sq_stats->xmit_more;
s->tx_csum_partial_inner += sq_stats->csum_partial_inner;
tx_offload_none += sq_stats->csum_none;
s->tx_csum_none += sq_stats->csum_none;
s->tx_csum_partial += sq_stats->csum_partial;
}
}
/* Update calculated offload counters */
s->tx_csum_partial = s->tx_packets - tx_offload_none - s->tx_csum_partial_inner;
s->rx_csum_unnecessary = s->rx_packets - s->rx_csum_none - s->rx_csum_complete;
s->link_down_events_phy = MLX5_GET(ppcnt_reg,
priv->stats.pport.phy_counters,
counter_set.phys_layer_cntrs.link_down_events);
......
......@@ -627,6 +627,7 @@ static inline void mlx5e_handle_csum(struct net_device *netdev,
if (lro) {
skb->ip_summed = CHECKSUM_UNNECESSARY;
rq->stats.csum_unnecessary++;
return;
}
......@@ -644,7 +645,9 @@ static inline void mlx5e_handle_csum(struct net_device *netdev,
skb->csum_level = 1;
skb->encapsulation = 1;
rq->stats.csum_unnecessary_inner++;
return;
}
rq->stats.csum_unnecessary++;
return;
}
csum_none:
......
......@@ -68,6 +68,7 @@ struct mlx5e_sw_stats {
u64 rx_xdp_drop;
u64 rx_xdp_tx;
u64 rx_xdp_tx_full;
u64 tx_csum_none;
u64 tx_csum_partial;
u64 tx_csum_partial_inner;
u64 tx_queue_stopped;
......@@ -108,6 +109,7 @@ static const struct counter_desc sw_stats_desc[] = {
{ MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, rx_xdp_drop) },
{ MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, rx_xdp_tx) },
{ MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, rx_xdp_tx_full) },
{ MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, tx_csum_none) },
{ MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, tx_csum_partial) },
{ MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, tx_csum_partial_inner) },
{ MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, tx_queue_stopped) },
......@@ -339,6 +341,7 @@ struct mlx5e_rq_stats {
u64 packets;
u64 bytes;
u64 csum_complete;
u64 csum_unnecessary;
u64 csum_unnecessary_inner;
u64 csum_none;
u64 lro_packets;
......@@ -363,6 +366,7 @@ static const struct counter_desc rq_stats_desc[] = {
{ MLX5E_DECLARE_RX_STAT(struct mlx5e_rq_stats, packets) },
{ MLX5E_DECLARE_RX_STAT(struct mlx5e_rq_stats, bytes) },
{ MLX5E_DECLARE_RX_STAT(struct mlx5e_rq_stats, csum_complete) },
{ MLX5E_DECLARE_RX_STAT(struct mlx5e_rq_stats, csum_unnecessary) },
{ MLX5E_DECLARE_RX_STAT(struct mlx5e_rq_stats, csum_unnecessary_inner) },
{ MLX5E_DECLARE_RX_STAT(struct mlx5e_rq_stats, csum_none) },
{ MLX5E_DECLARE_RX_STAT(struct mlx5e_rq_stats, xdp_drop) },
......@@ -392,6 +396,7 @@ struct mlx5e_sq_stats {
u64 tso_bytes;
u64 tso_inner_packets;
u64 tso_inner_bytes;
u64 csum_partial;
u64 csum_partial_inner;
u64 nop;
/* less likely accessed in data path */
......@@ -408,6 +413,7 @@ static const struct counter_desc sq_stats_desc[] = {
{ MLX5E_DECLARE_TX_STAT(struct mlx5e_sq_stats, tso_bytes) },
{ MLX5E_DECLARE_TX_STAT(struct mlx5e_sq_stats, tso_inner_packets) },
{ MLX5E_DECLARE_TX_STAT(struct mlx5e_sq_stats, tso_inner_bytes) },
{ MLX5E_DECLARE_TX_STAT(struct mlx5e_sq_stats, csum_partial) },
{ MLX5E_DECLARE_TX_STAT(struct mlx5e_sq_stats, csum_partial_inner) },
{ MLX5E_DECLARE_TX_STAT(struct mlx5e_sq_stats, nop) },
{ MLX5E_DECLARE_TX_STAT(struct mlx5e_sq_stats, csum_none) },
......
......@@ -193,6 +193,7 @@ mlx5e_txwqe_build_eseg_csum(struct mlx5e_txqsq *sq, struct sk_buff *skb, struct
sq->stats.csum_partial_inner++;
} else {
eseg->cs_flags |= MLX5_ETH_WQE_L4_CSUM;
sq->stats.csum_partial++;
}
} else
sq->stats.csum_none++;
......
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