ConnectX-5 SR-IOV stops transmitting and rx_congst_umr increases

Hello, I run Linux VMs on Azure with accelerated networking activated. A ConnectX-5 VF nic is exposed to the VM. In rare occasions the nic seems to not transmit any packet anymore. Linux reports high value for inflight packets in the byte queue limit. ethtool -S on the VF nic shows no packet being transmitted, while we see the rx_congst_umr error counter increasing.

Following are the details of the typical nic configuration, and also two ethtool -S ran consecutively at 1 second interval during the issue, along with the content of /proc/interrupts and /sys/class/net/${e}/queues/tx-*/byte_queue_limits/inflight. Would you have an idea how to troubleshoot further? thanks!

# lspci
2b7d:00:02.0 Ethernet controller: Mellanox Technologies MT27800 Family [ConnectX-5 Virtual Function] (rev 80)

# ethtool -i enP11133s1
driver: mlx5_core
version: 5.14.0-427.65.1.el9_4.x86_64
firmware-version: 16.30.5000 (MSF0000000012)
expansion-rom-version:
bus-info: 2b7d:00:02.0
supports-statistics: yes
supports-test: yes
supports-eeprom-access: no
supports-register-dump: no
supports-priv-flags: yes

# ethtool -c enP11133s1
Coalesce parameters for enP11133s1:
Adaptive RX: on  TX: on
stats-block-usecs:      n/a
sample-interval:        n/a
pkt-rate-low:           n/a
pkt-rate-high:          n/a

rx-usecs:       8
rx-frames:      128
rx-usecs-irq:   n/a
rx-frames-irq:  n/a

tx-usecs:       8
tx-frames:      128
tx-usecs-irq:   n/a
tx-frames-irq:  n/a

rx-usecs-low:   n/a
rx-frame-low:   n/a
tx-usecs-low:   n/a
tx-frame-low:   n/a

rx-usecs-high:  n/a
rx-frame-high:  n/a
tx-usecs-high:  n/a
tx-frame-high:  n/a

CQE mode RX: on  TX: off

# ethtool -g enP11133s1
Ring parameters for enP11133s1:
Pre-set maximums:
RX:             8192
RX Mini:        n/a
RX Jumbo:       n/a
TX:             8192
Current hardware settings:
RX:             8192
RX Mini:        n/a
RX Jumbo:       n/a
TX:             8192
RX Buf Len:     n/a
CQE Size:       n/a
TX Push:        off
TCP data split: off

# ethtool -l enP11133s1
Channel parameters for enP11133s1:
Pre-set maximums:
RX:             n/a
TX:             n/a
Other:          n/a
Combined:       16
Current hardware settings:
RX:             n/a
TX:             n/a
Other:          n/a
Combined:       16

# ethtool -k enP11133s1
Features for enP11133s1:
rx-checksumming: on
tx-checksumming: on
        tx-checksum-ipv4: on [fixed]
        tx-checksum-ip-generic: off
        tx-checksum-ipv6: on [fixed]
        tx-checksum-fcoe-crc: off [fixed]
        tx-checksum-sctp: off [fixed]
scatter-gather: on
        tx-scatter-gather: on
        tx-scatter-gather-fraglist: off [fixed]
tcp-segmentation-offload: on
        tx-tcp-segmentation: on
        tx-tcp-ecn-segmentation: off [fixed]
        tx-tcp-mangleid-segmentation: off
        tx-tcp6-segmentation: on
generic-segmentation-offload: on
generic-receive-offload: on
large-receive-offload: off
rx-vlan-offload: on
tx-vlan-offload: on
ntuple-filters: off
receive-hashing: on
highdma: on [fixed]
rx-vlan-filter: off
vlan-challenged: off [fixed]
tx-lockless: off [fixed]
netns-local: off [fixed]
tx-gso-robust: off [fixed]
tx-fcoe-segmentation: off [fixed]
tx-gre-segmentation: off
tx-gre-csum-segmentation: off
tx-ipxip4-segmentation: off
tx-ipxip6-segmentation: off
tx-udp_tnl-segmentation: off [fixed]
tx-udp_tnl-csum-segmentation: off [fixed]
tx-gso-partial: off
tx-tunnel-remcsum-segmentation: off [fixed]
tx-sctp-segmentation: off [fixed]
tx-esp-segmentation: off [fixed]
tx-udp-segmentation: off
tx-gso-list: off [fixed]
fcoe-mtu: off [fixed]
tx-nocache-copy: off
loopback: off [fixed]
rx-fcs: off
rx-all: off [fixed]
tx-vlan-stag-hw-insert: off
rx-vlan-stag-hw-parse: off [fixed]
rx-vlan-stag-filter: on [fixed]
l2-fwd-offload: off [fixed]
hw-tc-offload: off
esp-hw-offload: off [fixed]
esp-tx-csum-hw-offload: off [fixed]
rx-udp_tunnel-port-offload: off [fixed]
tls-hw-tx-offload: off [fixed]
tls-hw-rx-offload: off [fixed]
rx-gro-hw: off [fixed]
tls-hw-record: off [fixed]
rx-gro-list: off
macsec-hw-offload: off
rx-udp-gro-forwarding: on
hsr-tag-ins-offload: off [fixed]
hsr-tag-rm-offload: off [fixed]
hsr-fwd-offload: off [fixed]
hsr-dup-offload: off [fixed]

before:

NIC statistics:
     rx_packets: 104009754610
     rx_bytes: 120879172668176
     tx_packets: 135923618504
     tx_bytes: 166463657131543
     tx_tso_packets: 784014719
     tx_tso_bytes: 2185850369783
     tx_nop: 9716738702
     tx_mpwqe_blks: 16072105203
     tx_mpwqe_pkts: 16072147336
     rx_csum_unnecessary: 22119468
     rx_csum_none: 207575
     rx_csum_complete: 103987427567
     tx_csum_none: 19998618973
     tx_csum_partial: 114808414439
     tx_xmit_more: 186651341
     tx_cqes: 134620378401
     rx_congst_umr: 10021
     rx_pp_alloc_fast: 52002899008
     rx_pp_alloc_slow: 1304
     rx_pp_alloc_empty: 1304
     rx_pp_alloc_refill: 2036392
     rx_pp_recycle_cached: 51874534256
     rx_pp_recycle_ring: 130336912
     ch_events: 68341034306
     ch_poll: 68390650918
     ch_arm: 66604096523
     rx_if_down_packets: 171
     rx_vport_unicast_packets: 104009754774
     rx_vport_unicast_bytes: 120879172890267
     tx_vport_unicast_packets: 135923515133
     tx_vport_unicast_bytes: 166463648098868
     tx_vport_multicast_packets: 687
     tx_vport_multicast_bytes: 45818
     tx_vport_broadcast_packets: 98992
     tx_vport_broadcast_bytes: 5940507
     ch0_events: 4413480665
     ch0_poll: 4416620862
     ch0_arm: 4314261572
     ch1_events: 4146125773
     ch1_poll: 4149667551
     ch1_arm: 4055469921
     ch2_events: 4299792341
     ch2_poll: 4302650402
     ch2_arm: 4205825886
     ch3_events: 4084123679
     ch3_poll: 4087370962
     ch3_arm: 3995885453
     ch4_events: 4431598260
     ch4_poll: 4434828740
     ch4_arm: 4335869996
     ch5_events: 4204501467
     ch5_poll: 4207212425
     ch5_arm: 4033777807
     ch6_events: 4373780852
     ch6_poll: 4376839023
     ch6_arm: 4279664279
     ch7_events: 4110418756
     ch7_poll: 4113805343
     ch7_arm: 4021313755
     ch8_events: 4379982651
     ch8_poll: 4383228963
     ch8_arm: 4285001032
     ch9_events: 4114238806
     ch9_poll: 4117740222
     ch9_arm: 4017400999
     ch10_events: 4421714024
     ch10_poll: 4424797982
     ch10_arm: 4325953285
     ch11_events: 4151232296
     ch11_poll: 4154488239
     ch11_arm: 4064231670
     ch12_events: 4297283053
     ch12_poll: 4300197023
     ch12_arm: 4198746228
     ch13_events: 4137265800
     ch13_poll: 4139692689
     ch13_arm: 3963223482
     ch14_events: 4600649457
     ch14_poll: 4603385985
     ch14_arm: 4419567187
     ch15_events: 4174846428
     ch15_poll: 4178124509
     ch15_arm: 4087903973
     rx0_packets: 6448464205
     rx0_bytes: 7487373996616
     rx0_csum_complete: 6446872207
     rx0_csum_unnecessary: 1384423
     rx0_csum_none: 207575
     rx0_congst_umr: 437
     rx0_pp_alloc_fast: 3224111211
     rx0_pp_alloc_slow: 76
     rx0_pp_alloc_empty: 76
     rx0_pp_alloc_refill: 124425
     rx0_pp_recycle_cached: 3216268057
     rx0_pp_recycle_ring: 7963559
     rx1_packets: 6670961580
     rx1_bytes: 7786461152114
     rx1_csum_complete: 6669582622
     rx1_csum_unnecessary: 1378958
     rx1_congst_umr: 650
     rx1_pp_alloc_fast: 3335347612
     rx1_pp_alloc_slow: 83
     rx1_pp_alloc_empty: 83
     rx1_pp_alloc_refill: 135505
     rx1_pp_recycle_cached: 3326806223
     rx1_pp_recycle_ring: 8672881
     rx2_packets: 6054591230
     rx2_bytes: 6990855128070
     rx2_csum_complete: 6053211802
     rx2_csum_unnecessary: 1379428
     rx2_congst_umr: 670
     rx2_pp_alloc_fast: 3027187201
     rx2_pp_alloc_slow: 87
     rx2_pp_alloc_empty: 87
     rx2_pp_alloc_refill: 112232
     rx2_pp_recycle_cached: 3020111383
     rx2_pp_recycle_ring: 7184041
     rx3_packets: 6397840279
     rx3_bytes: 7437300687575
     rx3_csum_complete: 6396458293
     rx3_csum_unnecessary: 1381986
     rx3_congst_umr: 581
     rx3_pp_alloc_fast: 3198800922
     rx3_pp_alloc_slow: 74
     rx3_pp_alloc_empty: 74
     rx3_pp_alloc_refill: 121180
     rx3_pp_recycle_cached: 3191162219
     rx3_pp_recycle_ring: 7755861
     rx4_packets: 6501905100
     rx4_bytes: 7559972982862
     rx4_csum_complete: 6500523208
     rx4_csum_unnecessary: 1381892
     rx4_congst_umr: 507
     rx4_pp_alloc_fast: 3250832552
     rx4_pp_alloc_slow: 75
     rx4_pp_alloc_empty: 75
     rx4_pp_alloc_refill: 123853
     rx4_pp_recycle_cached: 3243025558
     rx4_pp_recycle_ring: 7926826
     rx5_packets: 6870441834
     rx5_bytes: 8008005259271
     rx5_csum_complete: 6869055614
     rx5_csum_unnecessary: 1386220
     rx5_congst_umr: 830
     rx5_pp_alloc_fast: 3435085208
     rx5_pp_alloc_slow: 78
     rx5_pp_alloc_empty: 78
     rx5_pp_alloc_refill: 139610
     rx5_pp_recycle_cached: 3426285335
     rx5_pp_recycle_ring: 8935465
     rx6_packets: 6293902315
     rx6_bytes: 7294818063657
     rx6_csum_complete: 6292519651
     rx6_csum_unnecessary: 1382664
     rx6_congst_umr: 557
     rx6_pp_alloc_fast: 3146834631
     rx6_pp_alloc_slow: 74
     rx6_pp_alloc_empty: 74
     rx6_pp_alloc_refill: 120367
     rx6_pp_recycle_cached: 3139247122
     rx6_pp_recycle_ring: 7703854
     rx7_packets: 6519867981
     rx7_bytes: 7575626289555
     rx7_csum_complete: 6518484249
     rx7_csum_unnecessary: 1383732
     rx7_congst_umr: 351
     rx7_pp_alloc_fast: 3259804000
     rx7_pp_alloc_slow: 75
     rx7_pp_alloc_empty: 75
     rx7_pp_alloc_refill: 133909
     rx7_pp_recycle_cached: 3251363237
     rx7_pp_recycle_ring: 8570651
     rx8_packets: 6472453931
     rx8_bytes: 7534643211397
     rx8_csum_complete: 6471071574
     rx8_csum_unnecessary: 1382357
     rx8_congst_umr: 735
     rx8_pp_alloc_fast: 3236102192
     rx8_pp_alloc_slow: 77
     rx8_pp_alloc_empty: 77
     rx8_pp_alloc_refill: 128707
     rx8_pp_recycle_cached: 3227989186
     rx8_pp_recycle_ring: 8237694
     rx9_packets: 6677102412
     rx9_bytes: 7798889123945
     rx9_csum_complete: 6675721869
     rx9_csum_unnecessary: 1380543
     rx9_congst_umr: 700
     rx9_pp_alloc_fast: 3338424233
     rx9_pp_alloc_slow: 126
     rx9_pp_alloc_empty: 126
     rx9_pp_alloc_refill: 130841
     rx9_pp_recycle_cached: 3330176947
     rx9_pp_recycle_ring: 8374157
     rx10_packets: 6364217606
     rx10_bytes: 7394286290617
     rx10_csum_complete: 6362834214
     rx10_csum_unnecessary: 1383392
     rx10_congst_umr: 576
     rx10_pp_alloc_fast: 3181992582
     rx10_pp_alloc_slow: 85
     rx10_pp_alloc_empty: 85
     rx10_pp_alloc_refill: 120037
     rx10_pp_recycle_cached: 3174425581
     rx10_pp_recycle_ring: 7683027
     rx11_packets: 6480670695
     rx11_bytes: 7529042264596
     rx11_csum_complete: 6479287203
     rx11_csum_unnecessary: 1383492
     rx11_congst_umr: 601
     rx11_pp_alloc_fast: 3240217525
     rx11_pp_alloc_slow: 83
     rx11_pp_alloc_empty: 83
     rx11_pp_alloc_refill: 121656
     rx11_pp_recycle_cached: 3232548272
     rx11_pp_recycle_ring: 7786896
     rx12_packets: 6223217093
     rx12_bytes: 7205922129762
     rx12_csum_complete: 6221831487
     rx12_csum_unnecessary: 1385606
     rx12_congst_umr: 575
     rx12_pp_alloc_fast: 3111492036
     rx12_pp_alloc_slow: 74
     rx12_pp_alloc_empty: 74
     rx12_pp_alloc_refill: 120370
     rx12_pp_recycle_cached: 3103904492
     rx12_pp_recycle_ring: 7703892
     rx13_packets: 6544266555
     rx13_bytes: 7594392681559
     rx13_csum_complete: 6542881988
     rx13_csum_unnecessary: 1384567
     rx13_congst_umr: 816
     rx13_pp_alloc_fast: 3272004775
     rx13_pp_alloc_slow: 79
     rx13_pp_alloc_empty: 79
     rx13_pp_alloc_refill: 132426
     rx13_pp_recycle_cached: 3263657668
     rx13_pp_recycle_ring: 8475516
     rx14_packets: 6955392761
     rx14_bytes: 8110633259049
     rx14_csum_complete: 6954013059
     rx14_csum_unnecessary: 1379702
     rx14_congst_umr: 574
     rx14_pp_alloc_fast: 3477553812
     rx14_pp_alloc_slow: 74
     rx14_pp_alloc_empty: 74
     rx14_pp_alloc_refill: 146402
     rx14_pp_recycle_cached: 3468326197
     rx14_pp_recycle_ring: 9369995
     rx15_packets: 6534459035
     rx15_bytes: 7570950148047
     rx15_csum_complete: 6533078529
     rx15_csum_unnecessary: 1380506
     rx15_congst_umr: 863
     rx15_pp_alloc_fast: 3267108516
     rx15_pp_alloc_slow: 84
     rx15_pp_alloc_empty: 84
     rx15_pp_alloc_refill: 124872
     rx15_pp_recycle_cached: 3259236779
     rx15_pp_recycle_ring: 7992597
     tx0_packets: 9177681073
     tx0_bytes: 11254226376765
     tx0_tso_packets: 53127845
     tx0_tso_bytes: 146994119190
     tx0_csum_partial: 7772718338
     tx0_nop: 660764086
     tx0_mpwqe_blks: 1074575531
     tx0_mpwqe_pkts: 1074582746
     tx0_csum_none: 1329934984
     tx0_xmit_more: 10481170
     tx0_cqes: 9092171890
     tx1_packets: 7794877780
     tx1_bytes: 9486385283539
     tx1_tso_packets: 44479392
     tx1_tso_bytes: 124745961213
     tx1_csum_partial: 6533345637
     tx1_nop: 575084230
     tx1_mpwqe_blks: 970022701
     tx1_mpwqe_pkts: 970024050
     tx1_csum_none: 1197760362
     tx1_xmit_more: 8026132
     tx1_cqes: 7723079544
     tx2_packets: 9147381580
     tx2_bytes: 11219597798912
     tx2_tso_packets: 52152135
     tx2_tso_bytes: 144404732216
     tx2_csum_partial: 7746513280
     tx2_nop: 654744271
     tx2_mpwqe_blks: 1065206055
     tx2_mpwqe_pkts: 1065207458
     tx2_csum_none: 1326841759
     tx2_xmit_more: 8773017
     tx2_cqes: 9064581863
     tx3_packets: 7745520315
     tx3_bytes: 9424046176462
     tx3_tso_packets: 44507411
     tx3_tso_bytes: 125120113942
     tx3_csum_partial: 6491977125
     tx3_nop: 572124476
     tx3_mpwqe_blks: 961882020
     tx3_mpwqe_pkts: 961888185
     tx3_csum_none: 1189460335
     tx3_xmit_more: 9936385
     tx3_cqes: 7671500951
     tx4_packets: 9217509308
     tx4_bytes: 11345096730548
     tx4_tso_packets: 53418160
     tx4_tso_bytes: 147601645729
     tx4_csum_partial: 7833977480
     tx4_nop: 651582103
     tx4_mpwqe_blks: 1050517957
     tx4_mpwqe_pkts: 1050520040
     tx4_csum_none: 1308329425
     tx4_xmit_more: 12595000
     tx4_cqes: 9129711389
     tx5_packets: 7741990169
     tx5_bytes: 9414523674913
     tx5_tso_packets: 44183763
     tx5_tso_bytes: 124023690172
     tx5_csum_partial: 6485880001
     tx5_nop: 552314355
     tx5_mpwqe_blks: 960841864
     tx5_mpwqe_pkts: 960843113
     tx5_csum_none: 1192736334
     tx5_xmit_more: 14209071
     tx5_cqes: 7664407160
     tx6_packets: 9140721203
     tx6_bytes: 11218903864104
     tx6_tso_packets: 52850320
     tx6_tso_bytes: 146420501337
     tx6_csum_partial: 7746403146
     tx6_nop: 652038962
     tx6_mpwqe_blks: 1058979062
     tx6_mpwqe_pkts: 1058980438
     tx6_csum_none: 1319273428
     tx6_xmit_more: 9609986
     tx6_cqes: 9056066278
     tx7_packets: 7847795161
     tx7_bytes: 9601002319347
     tx7_tso_packets: 46046525
     tx7_tso_bytes: 129344430148
     tx7_csum_partial: 6616398352
     tx7_nop: 568045411
     tx7_mpwqe_blks: 935912301
     tx7_mpwqe_pkts: 935913395
     tx7_csum_none: 1165391419
     tx7_xmit_more: 8525381
     tx7_cqes: 7773264357
     tx8_packets: 9051681212
     tx8_bytes: 11129332815032
     tx8_tso_packets: 52488444
     tx8_tso_bytes: 145673299300
     tx8_csum_partial: 7683796730
     tx8_nop: 641047104
     tx8_mpwqe_blks: 1037809710
     tx8_mpwqe_pkts: 1037811085
     tx8_csum_none: 1293319760
     tx8_xmit_more: 11748355
     tx8_cqes: 8965368023
     tx9_packets: 7812377419
     tx9_bytes: 9566570966203
     tx9_tso_packets: 45407397
     tx9_tso_bytes: 127508180981
     tx9_csum_partial: 6589714653
     tx9_nop: 560268655
     tx9_mpwqe_blks: 928772059
     tx9_mpwqe_pkts: 928775588
     tx9_csum_none: 1157733612
     tx9_xmit_more: 11523999
     tx9_cqes: 7735923686
     tx10_packets: 9139401359
     tx10_bytes: 11243710228410
     tx10_tso_packets: 53598355
     tx10_tso_bytes: 148174444033
     tx10_csum_partial: 7759397160
     tx10_nop: 647330629
     tx10_mpwqe_blks: 1040579776
     tx10_mpwqe_pkts: 1040582377
     tx10_csum_none: 1304615418
     tx10_xmit_more: 14477432
     tx10_cqes: 9049534982
     tx11_packets: 7958280479
     tx11_bytes: 9733645614983
     tx11_tso_packets: 45752087
     tx11_tso_bytes: 129013149046
     tx11_csum_partial: 6703444309
     tx11_nop: 575170424
     tx11_mpwqe_blks: 960554431
     tx11_mpwqe_pkts: 960555886
     tx11_csum_none: 1189114410
     tx11_xmit_more: 11768405
     tx11_cqes: 7880790217
     tx12_packets: 9214326004
     tx12_bytes: 11356095581400
     tx12_tso_packets: 52812793
     tx12_tso_bytes: 145869442606
     tx12_csum_partial: 7842956814
     tx12_nop: 646576494
     tx12_mpwqe_blks: 1036863432
     tx12_mpwqe_pkts: 1036870176
     tx12_csum_none: 1296765669
     tx12_xmit_more: 9876175
     tx12_cqes: 9129846276
     tx13_packets: 7771739047
     tx13_bytes: 9460232437077
     tx13_tso_packets: 44625991
     tx13_tso_bytes: 126064407221
     tx13_csum_partial: 6517997408
     tx13_nop: 548002615
     tx13_mpwqe_blks: 954119763
     tx13_mpwqe_pkts: 954121021
     tx13_csum_none: 1189118295
     tx13_xmit_more: 16528598
     tx13_cqes: 7690586560
     tx14_packets: 9327198615
     tx14_bytes: 11444099882295
     tx14_tso_packets: 53471737
     tx14_tso_bytes: 148109721848
     tx14_csum_partial: 7898024779
     tx14_nop: 642659882
     tx14_mpwqe_blks: 1085046860
     tx14_mpwqe_pkts: 1085048744
     tx14_csum_none: 1353706875
     tx14_xmit_more: 18569646
     tx14_cqes: 9233161893
     tx15_packets: 7835137780
     tx15_bytes: 9566187381553
     tx15_tso_packets: 45092364
     tx15_tso_bytes: 126782530801
     tx15_csum_partial: 6585869227
     tx15_nop: 568985005
     tx15_mpwqe_blks: 950421681
     tx15_mpwqe_pkts: 950423034
     tx15_csum_none: 1184516888
     tx15_xmit_more: 10002589
     tx15_cqes: 7760383332
           CPU0       CPU1       CPU2       CPU3       CPU4       CPU5       CPU6       CPU7       CPU8       CPU9       CPU10      CPU11      CPU12      CPU13      CPU14      CPU15
  4:          0          0       3611          0          0          0          0          0          0          0          0          0          0          0          0          0   IO-APIC   4-edge      ttyS0
  8:          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0   IO-APIC   8-edge      rtc0
  9:          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0   IO-APIC   9-fasteoi   acpi
 24:          0  150909051    1042065  149379077          0   70418610   14390803   56870401     112474   55662095   32669605   17360582   21023079  129188917    4326424   93861436  Hyper-V PCIe MSI 77309444096-edge      mlx5_async0@pci:0240:00:02.0
 25:        724          0         55       6591          1      63866          0      42887          0      38418 4263755032      46101         66  112621960      21734      39514  Hyper-V PCIe MSI 77309444097-edge      mlx5_comp1@pci:0240:00:02.0
 26:          0       2352          0 3502564496          0      29373      19601      18750  109210365      16588      41915  501087562          0      20743      10602      46259  Hyper-V PCIe MSI 77309444098-edge      mlx5_comp2@pci:0240:00:02.0
 27:          0          0        353       8706          0  477918495          1 3686124781          0      13104      62467  100597640       2557      43409     156502       3031  Hyper-V PCIe MSI 77309444099-edge      mlx5_comp3@pci:0240:00:02.0
 28:          0          0         53       5695   99494146      13620      31334      13007 3951675493       9642         91      10508      63364      33078          0       2337  Hyper-V PCIe MSI 77309444100-edge      mlx5_comp4@pci:0240:00:02.0
 29:         35         54         70      10047      37105       4040      30674  102167396      16292      10266      27833      16071      61248       4419       7340      10689  Hyper-V PCIe MSI 77309444101-edge      mlx5_comp5@pci:0240:00:02.0
 30:          0        262      14603  110210842       9501 3578839369  486165401      14199      10197      11604       8420      21814       1266       8833       9360       7790  Hyper-V PCIe MSI 77309444102-edge      mlx5_comp6@pci:0240:00:02.0
 31:          0         77      18869      24170 4231072938      15786        475      14496       9886      31192       4221      22148      33810      22291        203  109197150  Hyper-V PCIe MSI 77309444103-edge      mlx5_comp7@pci:0240:00:02.0
 32:          0 4077665806          0          0          0          0          0        415          0          0          0          1          0          0          0          0  Hyper-V PCIe MSI 77309444104-edge      mlx5_comp8@pci:0240:00:02.0
 33:   51497030          0          0          0          0          0          0          0        318          0          0          0          1          0          0          0  Hyper-V PCIe MSI 77309444105-edge      mlx5_comp9@pci:0240:00:02.0
 34:          0          0          0      62726         48       5775         43       5863          0  419937546  101252282   48454055      38105          1      43231 3512140862  Hyper-V PCIe MSI 77309444106-edge      mlx5_comp10@pci:0240:00:02.0
 35:          0          0     178561       2508        100       7998         54        956          0      19415      15045 3868725291         66       1560  516210967       6198  Hyper-V PCIe MSI 77309444107-edge      mlx5_comp11@pci:0240:00:02.0
 36:          0         46          0  502903455     101663      35353 3617230094      19949      39964      37889         31      25337       1970       1683         53      20272  Hyper-V PCIe MSI 77309444108-edge      mlx5_comp12@pci:0240:00:02.0
 37:          1         74         44      11848        197      24423         26  495532649       2547 3763078974        512      30262      23720      19792       9280      44505  Hyper-V PCIe MSI 77309444109-edge      mlx5_comp13@pci:0240:00:02.0
 38:          0          1   95909455      13699        239      16907       3609      18699      18534      19693        464      25842      19863 4013818918        339      17774  Hyper-V PCIe MSI 77309444110-edge      mlx5_comp14@pci:0240:00:02.0
 39:          0        108       4227       8941        213  109792302        120      38226       6573      15690         99      25456      11976      37372 3940671822  518488287  Hyper-V PCIe MSI 77309444111-edge      mlx5_comp15@pci:0240:00:02.0
 40:          0          0 4038730004        292     116746       1554      90264       4821          0      30480          0       5859          0      29772  105044550        368  Hyper-V PCIe MSI 77309444112-edge      mlx5_comp16@pci:0240:00:02.0
NMI:          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0   Non-maskable interrupts
LOC:          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0   Local timer interrupts
SPU:          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0   Spurious interrupts
PMI:          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0   Performance monitoring interrupts
IWI:    1879699    1852710    1896833    1843913    1865220    1841230    1893002    1831720    1851141    1789618    1904516    1815972    1865510    1832217    1905321    1802954   IRQ work interrupts
RTR:          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0   APIC ICR read retries
RES:   55323541   43359059   52988184   44035092   54827063   55137009   51942961   46547186   53997968   48453658   55738968   51259695   55259872   55383204   67824836   45993465   Rescheduling interrupts
CAL: 1891134989  444940925 1914582910  475347289 1894798469  407571888 1954832215  527327041 1958503614  515750654 1963093120  518191207 1998609751  466210738 1915275369  513880276   Function call interrupts
TLB:          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0   TLB shootdowns
TRM:          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0   Thermal event interrupts
THR:          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0   Threshold APIC interrupts
DFR:          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0   Deferred Error APIC interrupts
MCE:          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0   Machine check exceptions
MCP:       3615       3615       3615       3615       3615       3615       3615       3615       3615       3615       3615       3615       3615       3615       3615       3615   Machine check polls
HYP:    1497790          5         48     673400    1087961     772567          0         32          0         11         49         13          3         12         15          7   Hypervisor callback interrupts
HRE:          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0   Hyper-V reenlightenment interrupts
HVS: 1441309393 1351719889 1446526615 1352678368 1444433101 1348243275 1444985328 1353173258 1438402005 1340604615 1437721381 1347817400 1439038314 1350275399 1441700352 1350886985   Hyper-V stimer0 interrupts
ERR:          0
MIS:          0
PIN:          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0   Posted-interrupt notification event
NPI:          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0   Nested posted-interrupt event
PIW:          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0   Posted-interrupt wakeup event
/sys/class/net/enP576s1/queues/tx-0/byte_queue_limits/inflight:184783
/sys/class/net/enP576s1/queues/tx-1/byte_queue_limits/inflight:455668
/sys/class/net/enP576s1/queues/tx-10/byte_queue_limits/inflight:139458
/sys/class/net/enP576s1/queues/tx-11/byte_queue_limits/inflight:81794
/sys/class/net/enP576s1/queues/tx-12/byte_queue_limits/inflight:25416
/sys/class/net/enP576s1/queues/tx-13/byte_queue_limits/inflight:179768
/sys/class/net/enP576s1/queues/tx-14/byte_queue_limits/inflight:112049
/sys/class/net/enP576s1/queues/tx-15/byte_queue_limits/inflight:169535
/sys/class/net/enP576s1/queues/tx-2/byte_queue_limits/inflight:144471
/sys/class/net/enP576s1/queues/tx-3/byte_queue_limits/inflight:128293
/sys/class/net/enP576s1/queues/tx-4/byte_queue_limits/inflight:528686
/sys/class/net/enP576s1/queues/tx-5/byte_queue_limits/inflight:140212
/sys/class/net/enP576s1/queues/tx-6/byte_queue_limits/inflight:235499
/sys/class/net/enP576s1/queues/tx-7/byte_queue_limits/inflight:30932
/sys/class/net/enP576s1/queues/tx-8/byte_queue_limits/inflight:92361
/sys/class/net/enP576s1/queues/tx-9/byte_queue_limits/inflight:397425

1s after:

NIC statistics:
     rx_packets: 104009760946
     rx_bytes: 120879175263066
     tx_packets: 135923618504
     tx_bytes: 166463657131543
     tx_tso_packets: 784014719
     tx_tso_bytes: 2185850369783
     tx_nop: 9716738702
     tx_mpwqe_blks: 16072105203
     tx_mpwqe_pkts: 16072147336
     rx_csum_unnecessary: 22119512
     rx_csum_none: 207575
     rx_csum_complete: 103987433859
     tx_csum_none: 19998618973
     tx_csum_partial: 114808414439
     tx_xmit_more: 186651341
     tx_cqes: 134620378401
     rx_congst_umr: 15949
     rx_pp_alloc_fast: 52002902464
     rx_pp_alloc_slow: 1304
     rx_pp_alloc_empty: 1304
     rx_pp_alloc_refill: 2036392
     rx_pp_recycle_cached: 51874537712
     rx_pp_recycle_ring: 130336912
     ch_events: 68341040234
     ch_poll: 68390656846
     ch_arm: 66604102451
     rx_if_down_packets: 171
     rx_vport_unicast_packets: 104009761116
     rx_vport_unicast_bytes: 120879175486554
     tx_vport_unicast_packets: 135923515133
     tx_vport_unicast_bytes: 166463648098868
     tx_vport_multicast_packets: 687
     tx_vport_multicast_bytes: 45818
     tx_vport_broadcast_packets: 98992
     tx_vport_broadcast_bytes: 5940507
     ch0_events: 4413481085
     ch0_poll: 4416621282
     ch0_arm: 4314261992
     ch1_events: 4146126125
     ch1_poll: 4149667903
     ch1_arm: 4055470273
     ch2_events: 4299792781
     ch2_poll: 4302650842
     ch2_arm: 4205826326
     ch3_events: 4084124016
     ch3_poll: 4087371299
     ch3_arm: 3995885790
     ch4_events: 4431598643
     ch4_poll: 4434829123
     ch4_arm: 4335870379
     ch5_events: 4204501853
     ch5_poll: 4207212811
     ch5_arm: 4033778193
     ch6_events: 4373781187
     ch6_poll: 4376839358
     ch6_arm: 4279664614
     ch7_events: 4110419118
     ch7_poll: 4113805705
     ch7_arm: 4021314117
     ch8_events: 4379983025
     ch8_poll: 4383229337
     ch8_arm: 4285001406
     ch9_events: 4114239157
     ch9_poll: 4117740573
     ch9_arm: 4017401350
     ch10_events: 4421714313
     ch10_poll: 4424798271
     ch10_arm: 4325953574
     ch11_events: 4151232702
     ch11_poll: 4154488645
     ch11_arm: 4064232076
     ch12_events: 4297283434
     ch12_poll: 4300197404
     ch12_arm: 4198746609
     ch13_events: 4137266163
     ch13_poll: 4139693052
     ch13_arm: 3963223845
     ch14_events: 4600649825
     ch14_poll: 4603386353
     ch14_arm: 4419567555
     ch15_events: 4174846807
     ch15_poll: 4178124888
     ch15_arm: 4087904352
     rx0_packets: 6448464653
     rx0_bytes: 7487374194266
     rx0_csum_complete: 6446872645
     rx0_csum_unnecessary: 1384433
     rx0_csum_none: 207575
     rx0_congst_umr: 857
     rx0_pp_alloc_fast: 3224111467
     rx0_pp_alloc_slow: 76
     rx0_pp_alloc_empty: 76
     rx0_pp_alloc_refill: 124425
     rx0_pp_recycle_cached: 3216268313
     rx0_pp_recycle_ring: 7963559
     rx1_packets: 6670961955
     rx1_bytes: 7786461298781
     rx1_csum_complete: 6669582995
     rx1_csum_unnecessary: 1378960
     rx1_congst_umr: 1002
     rx1_pp_alloc_fast: 3335347868
     rx1_pp_alloc_slow: 83
     rx1_pp_alloc_empty: 83
     rx1_pp_alloc_refill: 135505
     rx1_pp_recycle_cached: 3326806479
     rx1_pp_recycle_ring: 8672881
     rx2_packets: 6054591699
     rx2_bytes: 6990855316791
     rx2_csum_complete: 6053212271
     rx2_csum_unnecessary: 1379428
     rx2_congst_umr: 1110
     rx2_pp_alloc_fast: 3027187457
     rx2_pp_alloc_slow: 87
     rx2_pp_alloc_empty: 87
     rx2_pp_alloc_refill: 112232
     rx2_pp_recycle_cached: 3020111639
     rx2_pp_recycle_ring: 7184041
     rx3_packets: 6397840631
     rx3_bytes: 7437300822494
     rx3_csum_complete: 6396458645
     rx3_csum_unnecessary: 1381986
     rx3_congst_umr: 918
     rx3_pp_alloc_fast: 3198801178
     rx3_pp_alloc_slow: 74
     rx3_pp_alloc_empty: 74
     rx3_pp_alloc_refill: 121180
     rx3_pp_recycle_cached: 3191162475
     rx3_pp_recycle_ring: 7755861
     rx4_packets: 6501905505
     rx4_bytes: 7559973135166
     rx4_csum_complete: 6500523603
     rx4_csum_unnecessary: 1381902
     rx4_congst_umr: 890
     rx4_pp_alloc_fast: 3250832808
     rx4_pp_alloc_slow: 75
     rx4_pp_alloc_empty: 75
     rx4_pp_alloc_refill: 123853
     rx4_pp_recycle_cached: 3243025814
     rx4_pp_recycle_ring: 7926826
     rx5_packets: 6870442246
     rx5_bytes: 8008005445176
     rx5_csum_complete: 6869056026
     rx5_csum_unnecessary: 1386220
     rx5_congst_umr: 1216
     rx5_pp_alloc_fast: 3435085336
     rx5_pp_alloc_slow: 78
     rx5_pp_alloc_empty: 78
     rx5_pp_alloc_refill: 139610
     rx5_pp_recycle_cached: 3426285463
     rx5_pp_recycle_ring: 8935465
     rx6_packets: 6293902678
     rx6_bytes: 7294818212319
     rx6_csum_complete: 6292520010
     rx6_csum_unnecessary: 1382668
     rx6_congst_umr: 892
     rx6_pp_alloc_fast: 3146834887
     rx6_pp_alloc_slow: 74
     rx6_pp_alloc_empty: 74
     rx6_pp_alloc_refill: 120367
     rx6_pp_recycle_cached: 3139247378
     rx6_pp_recycle_ring: 7703854
     rx7_packets: 6519868363
     rx7_bytes: 7575626446100
     rx7_csum_complete: 6518484629
     rx7_csum_unnecessary: 1383734
     rx7_congst_umr: 713
     rx7_pp_alloc_fast: 3259804128
     rx7_pp_alloc_slow: 75
     rx7_pp_alloc_empty: 75
     rx7_pp_alloc_refill: 133909
     rx7_pp_recycle_cached: 3251363365
     rx7_pp_recycle_ring: 8570651
     rx8_packets: 6472454323
     rx8_bytes: 7534643377485
     rx8_csum_complete: 6471071962
     rx8_csum_unnecessary: 1382361
     rx8_congst_umr: 1109
     rx8_pp_alloc_fast: 3236102320
     rx8_pp_alloc_slow: 77
     rx8_pp_alloc_empty: 77
     rx8_pp_alloc_refill: 128707
     rx8_pp_recycle_cached: 3227989314
     rx8_pp_recycle_ring: 8237694
     rx9_packets: 6677102792
     rx9_bytes: 7798889286125
     rx9_csum_complete: 6675722249
     rx9_csum_unnecessary: 1380543
     rx9_congst_umr: 1051
     rx9_pp_alloc_fast: 3338424361
     rx9_pp_alloc_slow: 126
     rx9_pp_alloc_empty: 126
     rx9_pp_alloc_refill: 130841
     rx9_pp_recycle_cached: 3330177075
     rx9_pp_recycle_ring: 8374157
     rx10_packets: 6364217916
     rx10_bytes: 7394286428725
     rx10_csum_complete: 6362834523
     rx10_csum_unnecessary: 1383393
     rx10_congst_umr: 865
     rx10_pp_alloc_fast: 3181992838
     rx10_pp_alloc_slow: 85
     rx10_pp_alloc_empty: 85
     rx10_pp_alloc_refill: 120037
     rx10_pp_recycle_cached: 3174425837
     rx10_pp_recycle_ring: 7683027
     rx11_packets: 6480671116
     rx11_bytes: 7529042404323
     rx11_csum_complete: 6479287614
     rx11_csum_unnecessary: 1383502
     rx11_congst_umr: 1007
     rx11_pp_alloc_fast: 3240217781
     rx11_pp_alloc_slow: 83
     rx11_pp_alloc_empty: 83
     rx11_pp_alloc_refill: 121656
     rx11_pp_recycle_cached: 3232548528
     rx11_pp_recycle_ring: 7786896
     rx12_packets: 6223217521
     rx12_bytes: 7205922328739
     rx12_csum_complete: 6221831915
     rx12_csum_unnecessary: 1385606
     rx12_congst_umr: 956
     rx12_pp_alloc_fast: 3111492292
     rx12_pp_alloc_slow: 74
     rx12_pp_alloc_empty: 74
     rx12_pp_alloc_refill: 120370
     rx12_pp_recycle_cached: 3103904748
     rx12_pp_recycle_ring: 7703892
     rx13_packets: 6544266941
     rx13_bytes: 7594392840762
     rx13_csum_complete: 6542882374
     rx13_csum_unnecessary: 1384567
     rx13_congst_umr: 1179
     rx13_pp_alloc_fast: 3272004903
     rx13_pp_alloc_slow: 79
     rx13_pp_alloc_empty: 79
     rx13_pp_alloc_refill: 132426
     rx13_pp_recycle_cached: 3263657796
     rx13_pp_recycle_ring: 8475516
     rx14_packets: 6955393161
     rx14_bytes: 8110633413018
     rx14_csum_complete: 6954013458
     rx14_csum_unnecessary: 1379703
     rx14_congst_umr: 942
     rx14_pp_alloc_fast: 3477554068
     rx14_pp_alloc_slow: 74
     rx14_pp_alloc_empty: 74
     rx14_pp_alloc_refill: 146402
     rx14_pp_recycle_cached: 3468326453
     rx14_pp_recycle_ring: 9369995
     rx15_packets: 6534459446
     rx15_bytes: 7570950312796
     rx15_csum_complete: 6533078940
     rx15_csum_unnecessary: 1380506
     rx15_congst_umr: 1242
     rx15_pp_alloc_fast: 3267108772
     rx15_pp_alloc_slow: 84
     rx15_pp_alloc_empty: 84
     rx15_pp_alloc_refill: 124872
     rx15_pp_recycle_cached: 3259237035
     rx15_pp_recycle_ring: 7992597
     tx0_packets: 9177681073
     tx0_bytes: 11254226376765
     tx0_tso_packets: 53127845
     tx0_tso_bytes: 146994119190
     tx0_csum_partial: 7772718338
     tx0_nop: 660764086
     tx0_mpwqe_blks: 1074575531
     tx0_mpwqe_pkts: 1074582746
     tx0_csum_none: 1329934984
     tx0_xmit_more: 10481170
     tx0_cqes: 9092171890
     tx1_packets: 7794877780
     tx1_bytes: 9486385283539
     tx1_tso_packets: 44479392
     tx1_tso_bytes: 124745961213
     tx1_csum_partial: 6533345637
     tx1_nop: 575084230
     tx1_mpwqe_blks: 970022701
     tx1_mpwqe_pkts: 970024050
     tx1_csum_none: 1197760362
     tx1_xmit_more: 8026132
     tx1_cqes: 7723079544
     tx2_packets: 9147381580
     tx2_bytes: 11219597798912
     tx2_tso_packets: 52152135
     tx2_tso_bytes: 144404732216
     tx2_csum_partial: 7746513280
     tx2_nop: 654744271
     tx2_mpwqe_blks: 1065206055
     tx2_mpwqe_pkts: 1065207458
     tx2_csum_none: 1326841759
     tx2_xmit_more: 8773017
     tx2_cqes: 9064581863
     tx3_packets: 7745520315
     tx3_bytes: 9424046176462
     tx3_tso_packets: 44507411
     tx3_tso_bytes: 125120113942
     tx3_csum_partial: 6491977125
     tx3_nop: 572124476
     tx3_mpwqe_blks: 961882020
     tx3_mpwqe_pkts: 961888185
     tx3_csum_none: 1189460335
     tx3_xmit_more: 9936385
     tx3_cqes: 7671500951
     tx4_packets: 9217509308
     tx4_bytes: 11345096730548
     tx4_tso_packets: 53418160
     tx4_tso_bytes: 147601645729
     tx4_csum_partial: 7833977480
     tx4_nop: 651582103
     tx4_mpwqe_blks: 1050517957
     tx4_mpwqe_pkts: 1050520040
     tx4_csum_none: 1308329425
     tx4_xmit_more: 12595000
     tx4_cqes: 9129711389
     tx5_packets: 7741990169
     tx5_bytes: 9414523674913
     tx5_tso_packets: 44183763
     tx5_tso_bytes: 124023690172
     tx5_csum_partial: 6485880001
     tx5_nop: 552314355
     tx5_mpwqe_blks: 960841864
     tx5_mpwqe_pkts: 960843113
     tx5_csum_none: 1192736334
     tx5_xmit_more: 14209071
     tx5_cqes: 7664407160
     tx6_packets: 9140721203
     tx6_bytes: 11218903864104
     tx6_tso_packets: 52850320
     tx6_tso_bytes: 146420501337
     tx6_csum_partial: 7746403146
     tx6_nop: 652038962
     tx6_mpwqe_blks: 1058979062
     tx6_mpwqe_pkts: 1058980438
     tx6_csum_none: 1319273428
     tx6_xmit_more: 9609986
     tx6_cqes: 9056066278
     tx7_packets: 7847795161
     tx7_bytes: 9601002319347
     tx7_tso_packets: 46046525
     tx7_tso_bytes: 129344430148
     tx7_csum_partial: 6616398352
     tx7_nop: 568045411
     tx7_mpwqe_blks: 935912301
     tx7_mpwqe_pkts: 935913395
     tx7_csum_none: 1165391419
     tx7_xmit_more: 8525381
     tx7_cqes: 7773264357
     tx8_packets: 9051681212
     tx8_bytes: 11129332815032
     tx8_tso_packets: 52488444
     tx8_tso_bytes: 145673299300
     tx8_csum_partial: 7683796730
     tx8_nop: 641047104
     tx8_mpwqe_blks: 1037809710
     tx8_mpwqe_pkts: 1037811085
     tx8_csum_none: 1293319760
     tx8_xmit_more: 11748355
     tx8_cqes: 8965368023
     tx9_packets: 7812377419
     tx9_bytes: 9566570966203
     tx9_tso_packets: 45407397
     tx9_tso_bytes: 127508180981
     tx9_csum_partial: 6589714653
     tx9_nop: 560268655
     tx9_mpwqe_blks: 928772059
     tx9_mpwqe_pkts: 928775588
     tx9_csum_none: 1157733612
     tx9_xmit_more: 11523999
     tx9_cqes: 7735923686
     tx10_packets: 9139401359
     tx10_bytes: 11243710228410
     tx10_tso_packets: 53598355
     tx10_tso_bytes: 148174444033
     tx10_csum_partial: 7759397160
     tx10_nop: 647330629
     tx10_mpwqe_blks: 1040579776
     tx10_mpwqe_pkts: 1040582377
     tx10_csum_none: 1304615418
     tx10_xmit_more: 14477432
     tx10_cqes: 9049534982
     tx11_packets: 7958280479
     tx11_bytes: 9733645614983
     tx11_tso_packets: 45752087
     tx11_tso_bytes: 129013149046
     tx11_csum_partial: 6703444309
     tx11_nop: 575170424
     tx11_mpwqe_blks: 960554431
     tx11_mpwqe_pkts: 960555886
     tx11_csum_none: 1189114410
     tx11_xmit_more: 11768405
     tx11_cqes: 7880790217
     tx12_packets: 9214326004
     tx12_bytes: 11356095581400
     tx12_tso_packets: 52812793
     tx12_tso_bytes: 145869442606
     tx12_csum_partial: 7842956814
     tx12_nop: 646576494
     tx12_mpwqe_blks: 1036863432
     tx12_mpwqe_pkts: 1036870176
     tx12_csum_none: 1296765669
     tx12_xmit_more: 9876175
     tx12_cqes: 9129846276
     tx13_packets: 7771739047
     tx13_bytes: 9460232437077
     tx13_tso_packets: 44625991
     tx13_tso_bytes: 126064407221
     tx13_csum_partial: 6517997408
     tx13_nop: 548002615
     tx13_mpwqe_blks: 954119763
     tx13_mpwqe_pkts: 954121021
     tx13_csum_none: 1189118295
     tx13_xmit_more: 16528598
     tx13_cqes: 7690586560
     tx14_packets: 9327198615
     tx14_bytes: 11444099882295
     tx14_tso_packets: 53471737
     tx14_tso_bytes: 148109721848
     tx14_csum_partial: 7898024779
     tx14_nop: 642659882
     tx14_mpwqe_blks: 1085046860
     tx14_mpwqe_pkts: 1085048744
     tx14_csum_none: 1353706875
     tx14_xmit_more: 18569646
     tx14_cqes: 9233161893
     tx15_packets: 7835137780
     tx15_bytes: 9566187381553
     tx15_tso_packets: 45092364
     tx15_tso_bytes: 126782530801
     tx15_csum_partial: 6585869227
     tx15_nop: 568985005
     tx15_mpwqe_blks: 950421681
     tx15_mpwqe_pkts: 950423034
     tx15_csum_none: 1184516888
     tx15_xmit_more: 10002589
     tx15_cqes: 7760383332
           CPU0       CPU1       CPU2       CPU3       CPU4       CPU5       CPU6       CPU7       CPU8       CPU9       CPU10      CPU11      CPU12      CPU13      CPU14      CPU15
  4:          0          0       3611          0          0          0          0          0          0          0          0          0          0          0          0          0   IO-APIC   4-edge      ttyS0
  8:          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0   IO-APIC   8-edge      rtc0
  9:          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0   IO-APIC   9-fasteoi   acpi
 24:          0  150909051    1042065  149379077          0   70418610   14390803   56870401     112474   55662095   32669605   17360582   21023146  129188917    4326424   93861436  Hyper-V PCIe MSI 77309444096-edge      mlx5_async0@pci:0240:00:02.0
 25:        724          0         55       6591          1      63866          0      42887          0      38418 4263755032      46101         66  112622379      21734      39514  Hyper-V PCIe MSI 77309444097-edge      mlx5_comp1@pci:0240:00:02.0
 26:          0       2352          0 3502564496          0      29373      19601      18750  109210716      16588      41915  501087562          0      20743      10602      46259  Hyper-V PCIe MSI 77309444098-edge      mlx5_comp2@pci:0240:00:02.0
 27:          0          0        353       8706          0  477918495          1 3686124781          0      13104      62467  100598079       2557      43409     156502       3031  Hyper-V PCIe MSI 77309444099-edge      mlx5_comp3@pci:0240:00:02.0
 28:          0          0         53       5695   99494483      13620      31334      13007 3951675493       9642         91      10508      63364      33078          0       2337  Hyper-V PCIe MSI 77309444100-edge      mlx5_comp4@pci:0240:00:02.0
 29:         35         54         70      10047      37105       4040      30674  102167779      16292      10266      27833      16071      61248       4419       7340      10689  Hyper-V PCIe MSI 77309444101-edge      mlx5_comp5@pci:0240:00:02.0
 30:          0        262      14603  110211228       9501 3578839369  486165401      14199      10197      11604       8420      21814       1266       8833       9360       7790  Hyper-V PCIe MSI 77309444102-edge      mlx5_comp6@pci:0240:00:02.0
 31:          0         77      18869      24170 4231072938      15786        475      14496       9886      31192       4221      22148      33810      22291        203  109197486  Hyper-V PCIe MSI 77309444103-edge      mlx5_comp7@pci:0240:00:02.0
 32:          0 4077666168          0          0          0          0          0        415          0          0          0          1          0          0          0          0  Hyper-V PCIe MSI 77309444104-edge      mlx5_comp8@pci:0240:00:02.0
 33:   51497402          0          0          0          0          0          0          0        318          0          0          0          1          0          0          0  Hyper-V PCIe MSI 77309444105-edge      mlx5_comp9@pci:0240:00:02.0
 34:          0          0          0      62726         48       5775         43       5863          0  419937546  101252632   48454055      38105          1      43231 3512140862  Hyper-V PCIe MSI 77309444106-edge      mlx5_comp10@pci:0240:00:02.0
 35:          0          0     178561       2508        100       7998         54        956          0      19415      15045 3868725581         66       1560  516210967       6198  Hyper-V PCIe MSI 77309444107-edge      mlx5_comp11@pci:0240:00:02.0
 36:          0         46          0  502903455     101663      35353 3617230498      19949      39964      37889         31      25337       1970       1683         53      20272  Hyper-V PCIe MSI 77309444108-edge      mlx5_comp12@pci:0240:00:02.0
 37:          1         74         44      11848        197      24423         26  495532649       2547 3763079354        512      30262      23720      19792       9280      44505  Hyper-V PCIe MSI 77309444109-edge      mlx5_comp13@pci:0240:00:02.0
 38:          0          1   95909817      13699        239      16907       3609      18699      18534      19693        464      25842      19863 4013818918        339      17774  Hyper-V PCIe MSI 77309444110-edge      mlx5_comp14@pci:0240:00:02.0
 39:          0        108       4227       8941        213  109792671        120      38226       6573      15690         99      25456      11976      37372 3940671822  518488287  Hyper-V PCIe MSI 77309444111-edge      mlx5_comp15@pci:0240:00:02.0
 40:          0          0 4038730004        292     116746       1554      90264       4821          0      30480          0       5859          0      29772  105044927        368  Hyper-V PCIe MSI 77309444112-edge      mlx5_comp16@pci:0240:00:02.0
NMI:          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0   Non-maskable interrupts
LOC:          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0   Local timer interrupts
SPU:          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0   Spurious interrupts
PMI:          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0   Performance monitoring interrupts
IWI:    1879699    1852710    1896834    1843913    1865220    1841230    1893002    1831720    1851141    1789618    1904516    1815972    1865510    1832217    1905321    1802954   IRQ work interrupts
RTR:          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0   APIC ICR read retries
RES:   55323547   43359062   52988190   44035099   54827070   55137018   51942970   46547190   53997978   48453664   55738975   51259701   55259879   55383211   67824842   45993474   Rescheduling interrupts
CAL: 1891135599  444941464 1914583516  475347799 1894799178  407572419 1954832920  527327518 1958504208  515751111 1963093799  518191684 1998610334  466211287 1915275988  513880738   Function call interrupts
TLB:          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0   TLB shootdowns
TRM:          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0   Thermal event interrupts
THR:          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0   Threshold APIC interrupts
DFR:          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0   Deferred Error APIC interrupts
MCE:          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0   Machine check exceptions
MCP:       3615       3615       3615       3615       3615       3615       3615       3615       3615       3615       3615       3615       3615       3615       3615       3615   Machine check polls
HYP:    1497791          5         48     673400    1087961     772567          0         32          0         11         49         13          3         12         15          7   Hypervisor callback interrupts
HRE:          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0   Hyper-V reenlightenment interrupts
HVS: 1441310554 1351721198 1446527831 1352679477 1444434265 1348244463 1444986564 1353174480 1438403164 1340605813 1437722652 1347818598 1439039009 1350276615 1441701539 1350888170   Hyper-V stimer0 interrupts
ERR:          0
MIS:          0
PIN:          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0   Posted-interrupt notification event
NPI:          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0   Nested posted-interrupt event
PIW:          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0          0   Posted-interrupt wakeup event
/sys/class/net/enP576s1/queues/tx-0/byte_queue_limits/inflight:184783
/sys/class/net/enP576s1/queues/tx-1/byte_queue_limits/inflight:455668
/sys/class/net/enP576s1/queues/tx-10/byte_queue_limits/inflight:139458
/sys/class/net/enP576s1/queues/tx-11/byte_queue_limits/inflight:81794
/sys/class/net/enP576s1/queues/tx-12/byte_queue_limits/inflight:25416
/sys/class/net/enP576s1/queues/tx-13/byte_queue_limits/inflight:179768
/sys/class/net/enP576s1/queues/tx-14/byte_queue_limits/inflight:112049
/sys/class/net/enP576s1/queues/tx-15/byte_queue_limits/inflight:169535
/sys/class/net/enP576s1/queues/tx-2/byte_queue_limits/inflight:144471
/sys/class/net/enP576s1/queues/tx-3/byte_queue_limits/inflight:128293
/sys/class/net/enP576s1/queues/tx-4/byte_queue_limits/inflight:528686
/sys/class/net/enP576s1/queues/tx-5/byte_queue_limits/inflight:140212
/sys/class/net/enP576s1/queues/tx-6/byte_queue_limits/inflight:235499
/sys/class/net/enP576s1/queues/tx-7/byte_queue_limits/inflight:30932
/sys/class/net/enP576s1/queues/tx-8/byte_queue_limits/inflight:92361
/sys/class/net/enP576s1/queues/tx-9/byte_queue_limits/inflight:397425

we see rx_congst_umr counter increased from 10021 to 15949 during that 1s.
The inflight numbers stay high, tx_packets did not increase.

Compared to nominal values, usually the rx_congst_umr does not increase, the inflight numbers are 0, and there is a higher number of interrupts and packets being processed.

hi

You can follow such guide to enable SRIOV on CX5:

If still have issue, you can contact Nvidia Networking Support for further help:

Thank you
Meng, Shi