[dpdk-users] TX/RX adapter running on the same core problem

[Jaeeun Ham]

Hi,

I hope you are well.

During the traffic test, TX adapter showed starvation due to Rx adapter processing on the same dpdk-core 03 and dropped the 41412 packets after 154655 tx_retry.
So, I expect I have to assign TX/RX adapter on each dpdk-core to prevent starvation and packet drop.

Are those tx_retry and tx_dropped packet due to RX adapter packet processing?
Is it possible to separate TX/RX adapter into different dpdk-core?

========[ TX adapter stats ]========
tx_retry: 154655
tx_packets: 438771
tx_dropped: 41412


< eventdev_dump.txt >
========[ Services ]========
qdispatch_service_id    : 0
txa_service_id          : 1
rxa_service_id          : 2
edk_service_id          : 3
timer_service_id        : 4
timer_adapter_service_id: 5

Service Cores Summary
dpdk-core 01: PDCP Fastpath Plugin control function thread

dpdk-core   qu-dispat   txadapter   rxadapter         edk         tmr   tmr-adapt
       03           0   770574949   770574948           0           0           0
       05   816421027           0           0   816421571   816421571   816421571
       07   896307282           0           0   896307828   896307828           0
       09   899213296           0           0   899213687   899213687           0
       11   889323680           0           0   889323871   889323871           0
       13   897300534           0           0   897300686   897300686           0
       15   891124716           0           0   891124811   891124811           0
       17   896336177           0           0   896336212   896336211           0
       19   895461845           0           0   895461846   895461846           0

========[ Event dev port 0 ~ 10 xstats ]========
- packet flow: f1u -> s1u one way
  midhaul_ker -> midhaul_edk -> backhaul_edk -> backhaul_ker
  port 09 Rx adapter -> port 07 -> port 06 -> port 08 -> port 09 Tx adapter

port 00: dpdk-core 05, worker_core // queue-dispatcher, edk, timer
port 01: dpdk-core 07, worker_core // queue-dispatcher, edk, timer
port 02: dpdk-core 09, worker_core // queue-dispatcher, edk, timer
port 03: dpdk-core 11, worker_core // queue-dispatcher, edk, timer
port 04: dpdk-core 13, worker_core // queue-dispatcher, edk, timer
port 05: dpdk-core 15, worker_core // queue-dispatcher, edk, timer
port 06: dpdk-core 17, worker_core // queue-dispatcher, edk, timer
port 07: dpdk-core 19, worker_core // queue-dispatcher, edk, timer
port 08: TX adapter, dpdk-core 03  // packet transmission
port 09: RX adapter, dpdk-core 03  // packet receiving
port 10: Event timer adapter       // tmr-adapter

BR/Jaeeun
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