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ixgbe: Improve statistics accuracy for DDP traffic

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Noticed that the byte and packet count statistics are under-
counting traffic handled by the DDP offload when there is more
than one DDP completion processed in a single call to
ixgbe_clean_rx_irq. This patch fixes that.

I tried to optimize the setting of the rss value so that it
only would have to be computed once, and only when there is
a DDP completion present.

Signed-off-by: Mark Rustad <mark.d.rustad@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Tested-by: Ross Brattain <ross.b.brattain@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Mark Rustad 2012-07-18 06:05:50 +00:00 committed by Jeff Kirsher
parent 91fbd8f081
commit 4ffdf91a5f
1 changed files with 16 additions and 16 deletions
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32
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
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@ -1785,7 +1785,8 @@ static bool ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector,
unsigned int total_rx_bytes = 0, total_rx_packets = 0;
#ifdef IXGBE_FCOE
struct ixgbe_adapter *adapter = q_vector->adapter;
int ddp_bytes = 0;
int ddp_bytes;
unsigned int mss = 0;
#endif /* IXGBE_FCOE */
u16 cleaned_count = ixgbe_desc_unused(rx_ring);
@ -1839,6 +1840,20 @@ static bool ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector,
/* if ddp, not passing to ULD unless for FCP_RSP or error */
if (ixgbe_rx_is_fcoe(rx_ring, rx_desc)) {
ddp_bytes = ixgbe_fcoe_ddp(adapter, rx_desc, skb);
/* include DDPed FCoE data */
if (ddp_bytes > 0) {
if (!mss) {
mss = rx_ring->netdev->mtu -
sizeof(struct fcoe_hdr) -
sizeof(struct fc_frame_header) -
sizeof(struct fcoe_crc_eof);
if (mss > 512)
mss &= ~511;
}
total_rx_bytes += ddp_bytes;
total_rx_packets += DIV_ROUND_UP(ddp_bytes,
mss);
}
if (!ddp_bytes) {
dev_kfree_skb_any(skb);
continue;
@ -1852,21 +1867,6 @@ static bool ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector,
budget--;
} while (likely(budget));
#ifdef IXGBE_FCOE
/* include DDPed FCoE data */
if (ddp_bytes > 0) {
unsigned int mss;
mss = rx_ring->netdev->mtu - sizeof(struct fcoe_hdr) -
sizeof(struct fc_frame_header) -
sizeof(struct fcoe_crc_eof);
if (mss > 512)
mss &= ~511;
total_rx_bytes += ddp_bytes;
total_rx_packets += DIV_ROUND_UP(ddp_bytes, mss);
}
#endif /* IXGBE_FCOE */
u64_stats_update_begin(&rx_ring->syncp);
rx_ring->stats.packets += total_rx_packets;
rx_ring->stats.bytes += total_rx_bytes;