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Message-Id: <20170209135838.16487-11-edumazet@google.com>
Date: Thu, 9 Feb 2017 05:58:34 -0800
From: Eric Dumazet <edumazet@...gle.com>
To: "David S . Miller" <davem@...emloft.net>
Cc: netdev <netdev@...r.kernel.org>,
Tariq Toukan <tariqt@...lanox.com>,
Martin KaFai Lau <kafai@...com>,
Willem de Bruijn <willemb@...gle.com>,
Jesper Dangaard Brouer <brouer@...hat.com>,
Brenden Blanco <bblanco@...mgrid.com>,
Alexei Starovoitov <ast@...nel.org>,
Eric Dumazet <edumazet@...gle.com>,
Eric Dumazet <eric.dumazet@...il.com>
Subject: [PATCH v2 net-next 10/14] mlx4: add rx_alloc_pages counter in ethtool -S
This new counter tracks number of pages that we allocated for one port.
lpaa24:~# ethtool -S eth0 | egrep 'rx_alloc_pages|rx_packets'
rx_packets: 306755183
rx_alloc_pages: 932897
Signed-off-by: Eric Dumazet <edumazet@...gle.com>
---
drivers/net/ethernet/mellanox/mlx4/en_ethtool.c | 2 +-
drivers/net/ethernet/mellanox/mlx4/en_port.c | 2 ++
drivers/net/ethernet/mellanox/mlx4/en_rx.c | 11 +++++++----
drivers/net/ethernet/mellanox/mlx4/mlx4_en.h | 1 +
drivers/net/ethernet/mellanox/mlx4/mlx4_stats.h | 2 +-
5 files changed, 12 insertions(+), 6 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c b/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c
index c4d714fcc7dae759998a49a1f90f9ab1ee9b..ffbcb27c05e55f43630a812249bab2160988 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c
@@ -117,7 +117,7 @@ static const char main_strings[][ETH_GSTRING_LEN] = {
/* port statistics */
"tso_packets",
"xmit_more",
- "queue_stopped", "wake_queue", "tx_timeout", "rx_alloc_failed",
+ "queue_stopped", "wake_queue", "tx_timeout", "rx_alloc_pages",
"rx_csum_good", "rx_csum_none", "rx_csum_complete", "tx_chksum_offload",
/* pf statistics */
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_port.c b/drivers/net/ethernet/mellanox/mlx4/en_port.c
index 9166d90e732858610b1407fe85cbf6cbe27f..e0eb695318e64ebcaf58d6edb5f9a57be6f9 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_port.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_port.c
@@ -213,6 +213,7 @@ int mlx4_en_DUMP_ETH_STATS(struct mlx4_en_dev *mdev, u8 port, u8 reset)
priv->port_stats.rx_chksum_good = 0;
priv->port_stats.rx_chksum_none = 0;
priv->port_stats.rx_chksum_complete = 0;
+ priv->port_stats.rx_alloc_pages = 0;
priv->xdp_stats.rx_xdp_drop = 0;
priv->xdp_stats.rx_xdp_tx = 0;
priv->xdp_stats.rx_xdp_tx_full = 0;
@@ -223,6 +224,7 @@ int mlx4_en_DUMP_ETH_STATS(struct mlx4_en_dev *mdev, u8 port, u8 reset)
priv->port_stats.rx_chksum_good += READ_ONCE(ring->csum_ok);
priv->port_stats.rx_chksum_none += READ_ONCE(ring->csum_none);
priv->port_stats.rx_chksum_complete += READ_ONCE(ring->csum_complete);
+ priv->port_stats.rx_alloc_pages += READ_ONCE(ring->rx_alloc_pages);
priv->xdp_stats.rx_xdp_drop += READ_ONCE(ring->xdp_drop);
priv->xdp_stats.rx_xdp_tx += READ_ONCE(ring->xdp_tx);
priv->xdp_stats.rx_xdp_tx_full += READ_ONCE(ring->xdp_tx_full);
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_rx.c b/drivers/net/ethernet/mellanox/mlx4/en_rx.c
index e737372a9b87428c4bab55a812274fbe4110..db2bceeb7e6405db0dbf45fdd20d47faae77 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_rx.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_rx.c
@@ -72,6 +72,7 @@ static int mlx4_alloc_page(struct mlx4_en_priv *priv,
}
static int mlx4_en_alloc_frags(struct mlx4_en_priv *priv,
+ struct mlx4_en_rx_ring *ring,
struct mlx4_en_rx_desc *rx_desc,
struct mlx4_en_rx_alloc *frags,
gfp_t gfp)
@@ -79,8 +80,11 @@ static int mlx4_en_alloc_frags(struct mlx4_en_priv *priv,
int i;
for (i = 0; i < priv->num_frags; i++, frags++) {
- if (!frags->page && mlx4_alloc_page(priv, frags, gfp))
- return -ENOMEM;
+ if (!frags->page) {
+ if (mlx4_alloc_page(priv, frags, gfp))
+ return -ENOMEM;
+ ring->rx_alloc_pages++;
+ }
rx_desc->data[i].addr = cpu_to_be64(frags->dma +
frags->page_offset);
}
@@ -133,7 +137,6 @@ static int mlx4_en_prepare_rx_desc(struct mlx4_en_priv *priv,
struct mlx4_en_rx_desc *rx_desc = ring->buf + (index * ring->stride);
struct mlx4_en_rx_alloc *frags = ring->rx_info +
(index << priv->log_rx_info);
-
if (ring->page_cache.index > 0) {
/* XDP uses a single page per frame */
if (!frags->page) {
@@ -147,7 +150,7 @@ static int mlx4_en_prepare_rx_desc(struct mlx4_en_priv *priv,
return 0;
}
- return mlx4_en_alloc_frags(priv, rx_desc, frags, gfp);
+ return mlx4_en_alloc_frags(priv, ring, rx_desc, frags, gfp);
}
static bool mlx4_en_is_ring_empty(const struct mlx4_en_rx_ring *ring)
diff --git a/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h b/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h
index 3c93b9614e0674e904d33b83e041f348d4f2..52f157cea7765ad6907c59aead357a158848 100644
--- a/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h
+++ b/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h
@@ -346,6 +346,7 @@ struct mlx4_en_rx_ring {
unsigned long csum_ok;
unsigned long csum_none;
unsigned long csum_complete;
+ unsigned long rx_alloc_pages;
unsigned long xdp_drop;
unsigned long xdp_tx;
unsigned long xdp_tx_full;
diff --git a/drivers/net/ethernet/mellanox/mlx4/mlx4_stats.h b/drivers/net/ethernet/mellanox/mlx4/mlx4_stats.h
index 48641cb0367f251a07537b82d0a16bf50d84..926f3c3f3665c5d28fe5d35c41afaa0e5917 100644
--- a/drivers/net/ethernet/mellanox/mlx4/mlx4_stats.h
+++ b/drivers/net/ethernet/mellanox/mlx4/mlx4_stats.h
@@ -37,7 +37,7 @@ struct mlx4_en_port_stats {
unsigned long queue_stopped;
unsigned long wake_queue;
unsigned long tx_timeout;
- unsigned long rx_alloc_failed;
+ unsigned long rx_alloc_pages;
unsigned long rx_chksum_good;
unsigned long rx_chksum_none;
unsigned long rx_chksum_complete;
--
2.11.0.483.g087da7b7c-goog
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