[v3] net/af_packet: improve Tx statistics accuracy
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Commit Message
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(-)
@@ -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;
}