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net/mlx5e: Add discard counters per priority 

Add counters that count (per priority) the number of received
packets that dropped due to lack of buffers on a physical port. If
this counter is increasing, it implies that the adapter is
congested and cannot absorb the traffic coming from the network.

Signed-off-by: Aharon Landau <aharonl@mellanox.com>
Reviewed-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Aharon Landau 2019-12-16 12:50:13 +02:00 committed by Saeed Mahameed
parent a58837f52d
commit 827a8cb2dd
2 changed files with 4 additions and 1 deletions
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1
drivers/net/ethernet/mellanox/mlx5/core/en_stats.c
View File

@ -1130,6 +1130,7 @@ static void mlx5e_grp_per_port_buffer_congest_update_stats(struct mlx5e_priv *pr
static const struct counter_desc pport_per_prio_traffic_stats_desc[] = {
{ "rx_prio%d_bytes", PPORT_PER_PRIO_OFF(rx_octets) },
{ "rx_prio%d_packets", PPORT_PER_PRIO_OFF(rx_frames) },
{ "rx_prio%d_discards", PPORT_PER_PRIO_OFF(rx_discards) },
{ "tx_prio%d_bytes", PPORT_PER_PRIO_OFF(tx_octets) },
{ "tx_prio%d_packets", PPORT_PER_PRIO_OFF(tx_frames) },
};

4
include/linux/mlx5/mlx5_ifc.h
View File

@ -2180,7 +2180,9 @@ struct mlx5_ifc_eth_per_prio_grp_data_layout_bits {
u8 rx_pause_transition_low[0x20];
u8 reserved_at_3c0[0x40];
u8 rx_discards_high[0x20];
u8 rx_discards_low[0x20];
u8 device_stall_minor_watermark_cnt_high[0x20];