[dpdk-dev] [PATCH] ixgbe: do not include CRC in Tx byte count

[stephen@networkplumber.org]

From: Stephen Hemminger <shemming@brocade.com>

The ixgbe driver was including CRC in the transmit packet byte
count, but not for packets received. This was notice when forwarding and
the number of bytes received was greater than the number of bytes transmitted
for the same number of packets. Make the driver behave like other
virtual devices and not include CRC in byte count. Use the same queue
counters already computed and used for Rx.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 lib/librte_pmd_ixgbe/ixgbe_ethdev.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/lib/librte_pmd_ixgbe/ixgbe_ethdev.c b/lib/librte_pmd_ixgbe/ixgbe_ethdev.c
index b58ec45..27355eb 100644
--- a/lib/librte_pmd_ixgbe/ixgbe_ethdev.c
+++ b/lib/librte_pmd_ixgbe/ixgbe_ethdev.c
@@ -1724,12 +1724,15 @@ ixgbe_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 	struct ixgbe_hw_stats *hw_stats =
 			IXGBE_DEV_PRIVATE_TO_STATS(dev->data->dev_private);
 	uint32_t bprc, lxon, lxoff, total;
-	uint64_t total_missed_rx, total_qbrc, total_qprc;
+	uint64_t total_missed_rx;
+	uint64_t total_qbrc, total_qprc, total_qbtc, total_qptc;
 	unsigned i;
 
 	total_missed_rx = 0;
 	total_qbrc = 0;
 	total_qprc = 0;
+	total_qbtc = 0;
+	total_qptc = 0;
 
 	hw_stats->crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS);
 	hw_stats->illerrc += IXGBE_READ_REG(hw, IXGBE_ILLERRC);
@@ -1770,6 +1773,8 @@ ixgbe_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 
 		total_qprc += hw_stats->qprc[i];
 		total_qbrc += hw_stats->qbrc[i];
+		total_qptc += hw_stats->qptc[i];
+		total_qbtc += hw_stats->qbtc[i];
 	}
 	hw_stats->mlfc += IXGBE_READ_REG(hw, IXGBE_MLFC);
 	hw_stats->mrfc += IXGBE_READ_REG(hw, IXGBE_MRFC);
@@ -1860,8 +1865,8 @@ ixgbe_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 	/* Fill out the rte_eth_stats statistics structure */
 	stats->ipackets = total_qprc;
 	stats->ibytes = total_qbrc;
-	stats->opackets = hw_stats->gptc;
-	stats->obytes = hw_stats->gotc;
+	stats->opackets = total_qptc;
+	stats->obytes = total_qbtc;
 	stats->imcasts = hw_stats->mprc;
 
 	for (i = 0; i < IXGBE_QUEUE_STAT_COUNTERS; i++) {
-- 
2.1.4