From: Qi Zhang <qi.z.zhang@intel.com>
To: jingjing.wu@intel.com, beilei.xing@intel.com
Cc: helin.zhang@intel.com, dev@dpdk.org,
Qi Zhang <qi.z.zhang@intel.com>,
stable@dpdk.org
Subject: [dpdk-dev] [PATCH] net/i40e: fix incorrect PF Rx bytes
Date: Tue, 4 Jul 2017 23:11:57 -0400 [thread overview]
Message-ID: <1499224317-32086-1-git-send-email-qi.z.zhang@intel.com> (raw)
Internal Rx packet bytes is over counted, CRC size is be excluded,
that cause incorrect Rx bytes or even negative value.
Fixes: 0bcdc44510ef ("net/i40e: exclude internal packet's byte count")
Cc: stable@dpdk.org
Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>
---
drivers/net/i40e/i40e_ethdev.c | 56 ++++++++++++++++++++++++++++++++++--------
drivers/net/i40e/i40e_ethdev.h | 8 +++---
2 files changed, 49 insertions(+), 15 deletions(-)
diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
index 80f8bc5..01eabf0 100644
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c
@@ -2391,14 +2391,35 @@ i40e_read_stats_registers(struct i40e_pf *pf, struct i40e_hw *hw)
i40e_stat_update_48(hw, I40E_GLV_GORCH(hw->port),
I40E_GLV_GORCL(hw->port),
pf->offset_loaded,
- &pf->internal_rx_bytes_offset,
- &pf->internal_rx_bytes);
+ &pf->internal_stats_offset.rx_bytes,
+ &pf->internal_stats.rx_bytes);
i40e_stat_update_48(hw, I40E_GLV_GOTCH(hw->port),
I40E_GLV_GOTCL(hw->port),
pf->offset_loaded,
- &pf->internal_tx_bytes_offset,
- &pf->internal_tx_bytes);
+ &pf->internal_stats_offset.tx_bytes,
+ &pf->internal_stats.tx_bytes);
+ /* Get total internal rx packet count */
+ i40e_stat_update_48(hw, I40E_GLV_UPRCH(hw->port),
+ I40E_GLV_UPRCL(hw->port),
+ pf->offset_loaded,
+ &pf->internal_stats_offset.rx_unicast,
+ &pf->internal_stats.rx_unicast);
+ i40e_stat_update_48(hw, I40E_GLV_MPRCH(hw->port),
+ I40E_GLV_MPRCL(hw->port),
+ pf->offset_loaded,
+ &pf->internal_stats_offset.rx_multicast,
+ &pf->internal_stats.rx_multicast);
+ i40e_stat_update_48(hw, I40E_GLV_BPRCH(hw->port),
+ I40E_GLV_BPRCL(hw->port),
+ pf->offset_loaded,
+ &pf->internal_stats_offset.rx_broadcast,
+ &pf->internal_stats.rx_broadcast);
+
+ /* exclude CRC size */
+ pf->internal_stats.rx_bytes -= (pf->internal_stats.rx_unicast +
+ pf->internal_stats.rx_multicast +
+ pf->internal_stats.rx_broadcast) * ETHER_CRC_LEN;
/* Get statistics of struct i40e_eth_stats */
i40e_stat_update_48(hw, I40E_GLPRT_GORCH(hw->port),
@@ -2421,7 +2442,17 @@ i40e_read_stats_registers(struct i40e_pf *pf, struct i40e_hw *hw)
* so subtract ETHER_CRC_LEN from the byte counter for each rx packet.
*/
ns->eth.rx_bytes -= (ns->eth.rx_unicast + ns->eth.rx_multicast +
- ns->eth.rx_broadcast) * ETHER_CRC_LEN + pf->internal_rx_bytes;
+ ns->eth.rx_broadcast) * ETHER_CRC_LEN;
+
+ /* Workaround: it is possible I40E_GLV_UPRC[H/L] is updated before
+ * I40E_GLPRT_GORCH[H/L], so there is a small window that cause negtive
+ * value.
+ */
+ if (ns->eth.rx_bytes < pf->internal_stats.rx_bytes)
+ ns->eth.rx_bytes = 0;
+ /* exlude internal rx bytes */
+ else
+ ns->eth.rx_bytes -= pf->internal_stats.rx_bytes;
i40e_stat_update_32(hw, I40E_GLPRT_RDPC(hw->port),
pf->offset_loaded, &os->eth.rx_discards,
@@ -2449,7 +2480,14 @@ i40e_read_stats_registers(struct i40e_pf *pf, struct i40e_hw *hw)
pf->offset_loaded, &os->eth.tx_broadcast,
&ns->eth.tx_broadcast);
ns->eth.tx_bytes -= (ns->eth.tx_unicast + ns->eth.tx_multicast +
- ns->eth.tx_broadcast) * ETHER_CRC_LEN + pf->internal_tx_bytes;
+ ns->eth.tx_broadcast) * ETHER_CRC_LEN;
+
+ /* exclude internal tx bytes */
+ if (ns->eth.tx_bytes < pf->internal_stats.tx_bytes)
+ ns->eth.tx_bytes = 0;
+ else
+ ns->eth.tx_bytes -= pf->internal_stats.tx_bytes;
+
/* GLPRT_TEPC not supported */
/* additional port specific stats */
@@ -5241,10 +5279,8 @@ i40e_pf_setup(struct i40e_pf *pf)
pf->offset_loaded = FALSE;
memset(&pf->stats, 0, sizeof(struct i40e_hw_port_stats));
memset(&pf->stats_offset, 0, sizeof(struct i40e_hw_port_stats));
- pf->internal_rx_bytes = 0;
- pf->internal_tx_bytes = 0;
- pf->internal_rx_bytes_offset = 0;
- pf->internal_tx_bytes_offset = 0;
+ memset(&pf->internal_stats, 0, sizeof(struct i40e_eth_stats));
+ memset(&pf->internal_stats_offset, 0, sizeof(struct i40e_eth_stats));
ret = i40e_pf_get_switch_config(pf);
if (ret != I40E_SUCCESS) {
diff --git a/drivers/net/i40e/i40e_ethdev.h b/drivers/net/i40e/i40e_ethdev.h
index 07677da..4ff8f49 100644
--- a/drivers/net/i40e/i40e_ethdev.h
+++ b/drivers/net/i40e/i40e_ethdev.h
@@ -665,11 +665,9 @@ struct i40e_pf {
struct i40e_hw_port_stats stats_offset;
struct i40e_hw_port_stats stats;
- /* internal packet byte count, it should be excluded from the total */
- uint64_t internal_rx_bytes;
- uint64_t internal_tx_bytes;
- uint64_t internal_rx_bytes_offset;
- uint64_t internal_tx_bytes_offset;
+ /* internal packet statistics, it should be excluded from the total */
+ struct i40e_eth_stats internal_stats_offset;
+ struct i40e_eth_stats internal_stats;
bool offset_loaded;
struct rte_eth_dev_data *dev_data; /* Pointer to the device data */
--
2.7.4
next reply other threads:[~2017-07-05 10:19 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-05 3:11 Qi Zhang [this message]
2017-07-05 6:48 ` [dpdk-dev] [PATCH v2] " Qi Zhang
2017-07-05 14:40 ` [dpdk-dev] [dpdk-stable] " Ferruh Yigit
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