From: "Shubhachint, Chaitanya" <Chaitanya.Shubhachint@netscout.com>
To: "dev@dpdk.org" <dev@dpdk.org>
Subject: [dpdk-dev] ixgbe: use of multiple tx queues
Date: Thu, 3 Sep 2020 22:44:01 +0000 [thread overview]
Message-ID: <DM6PR01MB49070849187B83BABB090AEF872C0@DM6PR01MB4907.prod.exchangelabs.com> (raw)
Hello,
I am working on a test code for generating packets. I am using an old NIC (Intel x520-LR1). The port is bound to igb_uio.
rte_eth_dev_info_get reports dev_info.max_tx_queues as 40 but the application is only configuring two tx queues (rte_eth_dev_configure). App feeds packets to both the queues. All packets are accounted for on the wire, but rte_eth_xstats_get show them only for queue-zero. See below, note the tx_q1 counts:
App Count:
tx_count[0] = 744048640
tx_count[1] = 744046592
rte_eth_xstats_get:
0: rx_good_packets: 0
1: tx_good_packets: 1488095232
.....
11: tx_q0packets: 1488095232
12: tx_q0bytes: 89285713920
13: tx_q1packets: 0
14: tx_q1bytes: 0
15: rx_crc_errors: 0
Same application when run inside a vm with vmxnet3 port, shows equal distribution between the two tx-queues.
App Counts:
tx_count[0] = 372023808
tx_count[1] = 372023808
rte_eth_xstats_get:
0: rx_good_packets: 2
1: tx_good_packets: 744047616
2: rx_good_bytes: 120
3: tx_good_bytes: 44642856960
-----
11: tx_q0packets: 372023808
12: tx_q0bytes: 22321428480
13: tx_q1packets: 372023808
14: tx_q1bytes: 22321428480
15: rx_q0_drop_total: 0
16: rx_q0_drop_err: 0
Do I need to modify any configuration when running with real adapters for using both tx-queues? Appreciate your advise.
Regards,
Chaitanya.
reply other threads:[~2020-09-03 22:44 UTC|newest]
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