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ixgbevf: move ring specific stats into ring specific structure
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This patch moves hot-path specific statistics into the ring structure.
This allows us to drop the adapter structure in some functions and should
help with performance.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Emil Tantilov <emil.s.tantilov@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Emil Tantilov authored and David S. Miller committed Jan 18, 2014
1 parent 05d063a commit 095e261
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Showing 3 changed files with 62 additions and 44 deletions.
12 changes: 6 additions & 6 deletions drivers/net/ethernet/intel/ixgbevf/ethtool.c
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Original file line number Diff line number Diff line change
Expand Up @@ -411,15 +411,15 @@ static void ixgbevf_get_ethtool_stats(struct net_device *netdev,
tx_yields = 0, tx_cleaned = 0, tx_missed = 0;

for (i = 0; i < adapter->num_rx_queues; i++) {
rx_yields += adapter->rx_ring[i]->bp_yields;
rx_cleaned += adapter->rx_ring[i]->bp_cleaned;
rx_yields += adapter->rx_ring[i]->bp_yields;
rx_yields += adapter->rx_ring[i]->stats.yields;
rx_cleaned += adapter->rx_ring[i]->stats.cleaned;
rx_yields += adapter->rx_ring[i]->stats.yields;
}

for (i = 0; i < adapter->num_tx_queues; i++) {
tx_yields += adapter->tx_ring[i]->bp_yields;
tx_cleaned += adapter->tx_ring[i]->bp_cleaned;
tx_yields += adapter->tx_ring[i]->bp_yields;
tx_yields += adapter->tx_ring[i]->stats.yields;
tx_cleaned += adapter->tx_ring[i]->stats.cleaned;
tx_yields += adapter->tx_ring[i]->stats.yields;
}

adapter->bp_rx_yields = rx_yields;
Expand Down
44 changes: 33 additions & 11 deletions drivers/net/ethernet/intel/ixgbevf/ixgbevf.h
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Original file line number Diff line number Diff line change
Expand Up @@ -59,6 +59,29 @@ struct ixgbevf_rx_buffer {
dma_addr_t dma;
};

struct ixgbevf_stats {
u64 packets;
u64 bytes;
#ifdef BP_EXTENDED_STATS
u64 yields;
u64 misses;
u64 cleaned;
#endif
};

struct ixgbevf_tx_queue_stats {
u64 restart_queue;
u64 tx_busy;
u64 tx_done_old;
};

struct ixgbevf_rx_queue_stats {
u64 non_eop_descs;
u64 alloc_rx_page_failed;
u64 alloc_rx_buff_failed;
u64 csum_err;
};

struct ixgbevf_ring {
struct ixgbevf_ring *next;
struct net_device *netdev;
Expand All @@ -70,29 +93,28 @@ struct ixgbevf_ring {
unsigned int next_to_use;
unsigned int next_to_clean;

int queue_index; /* needed for multiqueue queue management */
union {
struct ixgbevf_tx_buffer *tx_buffer_info;
struct ixgbevf_rx_buffer *rx_buffer_info;
};

u64 total_bytes;
u64 total_packets;
struct u64_stats_sync syncp;
struct ixgbevf_stats stats;
struct u64_stats_sync syncp;
union {
struct ixgbevf_tx_queue_stats tx_stats;
struct ixgbevf_rx_queue_stats rx_stats;
};

u64 hw_csum_rx_error;
u64 hw_csum_rx_good;
#ifdef BP_EXTENDED_STATS
u64 bp_yields;
u64 bp_misses;
u64 bp_cleaned;
#endif
u8 __iomem *tail;

u16 reg_idx; /* holds the special value that gets the hardware register
* offset associated with this ring, which is different
* for DCB and RSS modes */

u16 rx_buf_len;
int queue_index; /* needed for multiqueue queue management */
};

/* How many Rx Buffers do we bundle into one write to the hardware ? */
Expand Down Expand Up @@ -186,7 +208,7 @@ static inline bool ixgbevf_qv_lock_napi(struct ixgbevf_q_vector *q_vector)
q_vector->state |= IXGBEVF_QV_STATE_NAPI_YIELD;
rc = false;
#ifdef BP_EXTENDED_STATS
q_vector->tx.ring->bp_yields++;
q_vector->tx.ring->stats.yields++;
#endif
} else {
/* we don't care if someone yielded */
Expand Down Expand Up @@ -221,7 +243,7 @@ static inline bool ixgbevf_qv_lock_poll(struct ixgbevf_q_vector *q_vector)
q_vector->state |= IXGBEVF_QV_STATE_POLL_YIELD;
rc = false;
#ifdef BP_EXTENDED_STATS
q_vector->rx.ring->bp_yields++;
q_vector->rx.ring->stats.yields++;
#endif
} else {
/* preserve yield marks */
Expand Down
50 changes: 23 additions & 27 deletions drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
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Original file line number Diff line number Diff line change
Expand Up @@ -268,8 +268,8 @@ static bool ixgbevf_clean_tx_irq(struct ixgbevf_q_vector *q_vector,
}

u64_stats_update_begin(&tx_ring->syncp);
tx_ring->total_bytes += total_bytes;
tx_ring->total_packets += total_packets;
tx_ring->stats.bytes += total_bytes;
tx_ring->stats.packets += total_packets;
u64_stats_update_end(&tx_ring->syncp);
q_vector->tx.total_bytes += total_bytes;
q_vector->tx.total_packets += total_packets;
Expand Down Expand Up @@ -343,15 +343,15 @@ static inline void ixgbevf_rx_checksum(struct ixgbevf_ring *ring,
/* if IP and error */
if ((status_err & IXGBE_RXD_STAT_IPCS) &&
(status_err & IXGBE_RXDADV_ERR_IPE)) {
ring->hw_csum_rx_error++;
ring->rx_stats.csum_err++;
return;
}

if (!(status_err & IXGBE_RXD_STAT_L4CS))
return;

if (status_err & IXGBE_RXDADV_ERR_TCPE) {
ring->hw_csum_rx_error++;
ring->rx_stats.csum_err++;
return;
}

Expand All @@ -362,10 +362,9 @@ static inline void ixgbevf_rx_checksum(struct ixgbevf_ring *ring,

/**
* ixgbevf_alloc_rx_buffers - Replace used receive buffers; packet split
* @adapter: address of board private structure
* @rx_ring: rx descriptor ring (for a specific queue) to setup buffers on
**/
static void ixgbevf_alloc_rx_buffers(struct ixgbevf_adapter *adapter,
struct ixgbevf_ring *rx_ring,
static void ixgbevf_alloc_rx_buffers(struct ixgbevf_ring *rx_ring,
int cleaned_count)
{
union ixgbe_adv_rx_desc *rx_desc;
Expand Down Expand Up @@ -404,7 +403,7 @@ static void ixgbevf_alloc_rx_buffers(struct ixgbevf_adapter *adapter,
}

no_buffers:
adapter->alloc_rx_buff_failed++;
rx_ring->rx_stats.alloc_rx_buff_failed++;
if (rx_ring->next_to_use != i)
ixgbevf_release_rx_desc(rx_ring, i);
}
Expand All @@ -421,7 +420,6 @@ static int ixgbevf_clean_rx_irq(struct ixgbevf_q_vector *q_vector,
struct ixgbevf_ring *rx_ring,
int budget)
{
struct ixgbevf_adapter *adapter = q_vector->adapter;
union ixgbe_adv_rx_desc *rx_desc, *next_rxd;
struct ixgbevf_rx_buffer *rx_buffer_info, *next_buffer;
struct sk_buff *skb;
Expand Down Expand Up @@ -467,7 +465,7 @@ static int ixgbevf_clean_rx_irq(struct ixgbevf_q_vector *q_vector,
if (!(staterr & IXGBE_RXD_STAT_EOP)) {
skb->next = next_buffer->skb;
IXGBE_CB(skb->next)->prev = skb;
adapter->non_eop_descs++;
rx_ring->rx_stats.non_eop_descs++;
goto next_desc;
}

Expand Down Expand Up @@ -499,7 +497,7 @@ static int ixgbevf_clean_rx_irq(struct ixgbevf_q_vector *q_vector,
* source pruning.
*/
if ((skb->pkt_type & (PACKET_BROADCAST | PACKET_MULTICAST)) &&
ether_addr_equal(adapter->netdev->dev_addr,
ether_addr_equal(rx_ring->netdev->dev_addr,
eth_hdr(skb)->h_source)) {
dev_kfree_skb_irq(skb);
goto next_desc;
Expand All @@ -512,8 +510,7 @@ static int ixgbevf_clean_rx_irq(struct ixgbevf_q_vector *q_vector,

/* return some buffers to hardware, one at a time is too slow */
if (cleaned_count >= IXGBEVF_RX_BUFFER_WRITE) {
ixgbevf_alloc_rx_buffers(adapter, rx_ring,
cleaned_count);
ixgbevf_alloc_rx_buffers(rx_ring, cleaned_count);
cleaned_count = 0;
}

Expand All @@ -528,11 +525,11 @@ static int ixgbevf_clean_rx_irq(struct ixgbevf_q_vector *q_vector,
cleaned_count = ixgbevf_desc_unused(rx_ring);

if (cleaned_count)
ixgbevf_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
ixgbevf_alloc_rx_buffers(rx_ring, cleaned_count);

u64_stats_update_begin(&rx_ring->syncp);
rx_ring->total_packets += total_rx_packets;
rx_ring->total_bytes += total_rx_bytes;
rx_ring->stats.packets += total_rx_packets;
rx_ring->stats.bytes += total_rx_bytes;
u64_stats_update_end(&rx_ring->syncp);
q_vector->rx.total_packets += total_rx_packets;
q_vector->rx.total_bytes += total_rx_bytes;
Expand Down Expand Up @@ -637,9 +634,9 @@ static int ixgbevf_busy_poll_recv(struct napi_struct *napi)
found = ixgbevf_clean_rx_irq(q_vector, ring, 4);
#ifdef BP_EXTENDED_STATS
if (found)
ring->bp_cleaned += found;
ring->stats.cleaned += found;
else
ring->bp_misses++;
ring->stats.misses++;
#endif
if (found)
break;
Expand Down Expand Up @@ -1313,7 +1310,7 @@ static void ixgbevf_configure_rx_ring(struct ixgbevf_adapter *adapter,
IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(reg_idx), rxdctl);

ixgbevf_rx_desc_queue_enable(adapter, ring);
ixgbevf_alloc_rx_buffers(adapter, ring, ixgbevf_desc_unused(ring));
ixgbevf_alloc_rx_buffers(ring, ixgbevf_desc_unused(ring));
}

/**
Expand Down Expand Up @@ -3048,8 +3045,6 @@ static void ixgbevf_tx_queue(struct ixgbevf_ring *tx_ring, int tx_flags,

static int __ixgbevf_maybe_stop_tx(struct ixgbevf_ring *tx_ring, int size)
{
struct ixgbevf_adapter *adapter = netdev_priv(tx_ring->netdev);

netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
/* Herbert's original patch had:
* smp_mb__after_netif_stop_queue();
Expand All @@ -3063,7 +3058,8 @@ static int __ixgbevf_maybe_stop_tx(struct ixgbevf_ring *tx_ring, int size)

/* A reprieve! - use start_queue because it doesn't call schedule */
netif_start_subqueue(tx_ring->netdev, tx_ring->queue_index);
++adapter->restart_queue;
++tx_ring->tx_stats.restart_queue;

return 0;
}

Expand Down Expand Up @@ -3108,7 +3104,7 @@ static int ixgbevf_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
count += skb_shinfo(skb)->nr_frags;
#endif
if (ixgbevf_maybe_stop_tx(tx_ring, count + 3)) {
adapter->tx_busy++;
tx_ring->tx_stats.tx_busy++;
return NETDEV_TX_BUSY;
}

Expand Down Expand Up @@ -3308,8 +3304,8 @@ static struct rtnl_link_stats64 *ixgbevf_get_stats(struct net_device *netdev,
ring = adapter->rx_ring[i];
do {
start = u64_stats_fetch_begin_bh(&ring->syncp);
bytes = ring->total_bytes;
packets = ring->total_packets;
bytes = ring->stats.bytes;
packets = ring->stats.packets;
} while (u64_stats_fetch_retry_bh(&ring->syncp, start));
stats->rx_bytes += bytes;
stats->rx_packets += packets;
Expand All @@ -3319,8 +3315,8 @@ static struct rtnl_link_stats64 *ixgbevf_get_stats(struct net_device *netdev,
ring = adapter->tx_ring[i];
do {
start = u64_stats_fetch_begin_bh(&ring->syncp);
bytes = ring->total_bytes;
packets = ring->total_packets;
bytes = ring->stats.bytes;
packets = ring->stats.packets;
} while (u64_stats_fetch_retry_bh(&ring->syncp, start));
stats->tx_bytes += bytes;
stats->tx_packets += packets;
Expand Down

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