diff mbox series

[v3] net/af_packet: improve Tx statistics accuracy

Message ID 1571313107-31794-1-git-send-email-flavia.musatescu@intel.com (mailing list archive)
State Superseded, archived
Delegated to: Ferruh Yigit
Headers
Series [v3] net/af_packet: improve Tx statistics accuracy |

Checks

Context Check Description
ci/checkpatch success coding style OK
ci/Intel-compilation success Compilation OK
ci/travis-robot success Travis build: passed
ci/iol-intel-Performance success Performance Testing PASS
ci/iol-compilation success Compile Testing PASS
ci/iol-mellanox-Performance success Performance Testing PASS

Commit Message

Flavia Musatescu Oct. 17, 2019, 11:51 a.m. UTC 
  When sendto call fails and ENOBUFS/EAGAIN error is being set
some of the packets are actually successfully transmitted.
There is no available count of those packets, so in order to
make the statistics more accurate, all the previously enqueued
packets will be considered successful, even though this is not
entirely correct.

Before:
   testpmd Tx statistics:
      TX-packets: 7529062   TX-errors: 3702150  TX-bytes:  451743720
   pktgen Rx statistics:
      Total Rx Pkts: 10700700

After:
   testpmd TX statistics:
      TX-packets: 11510625  TX-errors: 0        TX-bytes:  690637500
   pktgen Rx statistics:
      Total Rx Pkts: 10974307

Fixes: 74b7fc0a0ff1 ("net/af_packet: fix packet bytes counting")
Cc: ciwillia@brocade.com
Cc: stable@dpdk.org

Signed-off-by: Flavia Musatescu <flavia.musatescu@intel.com>

---
v2:
* Changed the comment.

v3:
* Same applied for EAGAIN error.
---
 drivers/net/af_packet/rte_eth_af_packet.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/af_packet/rte_eth_af_packet.c b/drivers/net/af_packet/rte_eth_af_packet.c
index 6df09f2..5592626 100644
--- a/drivers/net/af_packet/rte_eth_af_packet.c
+++ b/drivers/net/af_packet/rte_eth_af_packet.c
@@ -244,8 +244,14 @@  eth_af_packet_tx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
 	}
 
 	/* kick-off transmits */
-	if (sendto(pkt_q->sockfd, NULL, 0, MSG_DONTWAIT, NULL, 0) == -1) {
-		/* error sending -- no packets transmitted */
+	if (sendto(pkt_q->sockfd, NULL, 0, MSG_DONTWAIT, NULL, 0) == -1 &&
+			errno != ENOBUFS && errno != EAGAIN) {
+		/*
+		 * In case of a ENOBUFS/EAGAIN error all of the enqueued
+		 * packets will be considered successful even though only some
+		 * are sent.
+		 */
+
 		num_tx = 0;
 		num_tx_bytes = 0;
 	}