[dpdk-dev] [Bug 798] mlx5 hw flow performance problem

[bugzilla at dpdk.org]

https://bugs.dpdk.org/show_bug.cgi?id=798

            Bug ID: 798
           Summary: mlx5 hw flow performance problem
           Product: DPDK
           Version: 21.08
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: critical
          Priority: Normal
         Component: ethdev
          Assignee: dev at dpdk.org
          Reporter: kangzy1982 at qq.com
  Target Milestone: ---

DPDK: 18.11/19.11/20.11/21.02/21.05/21.08
NIC: Mellanox Technologies MT27800 Family [ConnectX-5]
FW: firmware-version: 16.31.1014 (MT_0000000012)
CPU: Intel(R) Xeon(R) Platinum 8170M CPU @ 2.10GHz
KERNEL: 5.4.17-2102.200.13.uek
PKTGEN: IxNetwork 9.00.1915.16
MLNX OFED: MLNX_OFED_LINUX-5.0-2.1.8.0

testpmd:

testpmd -l 26-51 --socket-mem=4096,4096 -w
d8:00.0,dv_flow_en=0,mprq_en=1,rxqs_min_mprq=1,rx_vec_en=1 -- -i --rxq=16
--txq=16 --nb-cor
es=16 --forward-mode=icmpecho --numa --enable-rx-cksum -a --rxd=2048 --txd=2048
--burst=64


testpmd -l 26-51 --socket-mem=4096,4096 -w
d8:00.0,dv_flow_en=1,mprq_en=1,rxqs_min_mprq=1,rx_vec_en=1 -- -i --rxq=16
--txq=16 --nb-cor
es=16 --forward-mode=icmpecho --numa --enable-rx-cksum -a --rxd=2048 --txd=2048
--burst=64


flow:
testpmd> flow create 0 ingress pattern eth / ipv4 dst is 1.1.1.1 / tcp / end
actions queue index  15 / end
Flow rule #0 created
testpmd> flow create 0 ingress pattern eth / ipv4 dst is 1.1.1.1 / udp / end
actions queue index  15 / end
Flow rule #1 created
testpmd> flow create 0 ingress pattern eth / ipv4 / udp dst is 53 / end actions
count / rss / end
Flow rule #2 created


with these flows, no packet matched and testpmd only received 60.1Mpps:
testpmd> show  port stats all

  ######################## NIC statistics for port 0  ########################
  RX-packets: 6512958506 RX-missed: 4476258    RX-bytes:  390777510360
  RX-errors: 0
  RX-nombuf:  0         
  TX-packets: 0          TX-errors: 0          TX-bytes:  0

  Throughput (since last show)
  Rx-pps:     60163078          Rx-bps:  28878277584
  Tx-pps:            0          Tx-bps:            0
  ############################################################################
testpmd> 

with flush all flows, testpmd received 148.8Mpps
testpmd> flow flush  0
testpmd> show  port stats all

  ######################## NIC statistics for port 0  ########################
  RX-packets: 10076834471 RX-missed: 4482703    RX-bytes:  604610068260
  RX-errors: 0
  RX-nombuf:  0         
  TX-packets: 0          TX-errors: 0          TX-bytes:  0

  Throughput (since last show)
  Rx-pps:    148061620          Rx-bps:  71069577904
  Tx-pps:            0          Tx-bps:            0
  ############################################################################
testpmd>

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