ifpps 0.5.8-rc2 ifpps drops ?

[Novice]

Hi all

After a bit of googling and unable to find an answer I have arrived here. Trying to figure out why there are drops

eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500

        inet 172.17.146.140  netmask 255.255.240.0  broadcast 172.17.159.255

        inet6 fe80::215:5dff:fe90:cb95  prefixlen 64  scopeid 0x20<link>

        ether 00:15:5d:90:cb:95  txqueuelen 1000  (Ethernet)

        RX packets 685944132  bytes 94503551689 (88.0 GiB)

        RX errors 0  dropped 347130922  overruns 0  frame 0

        TX packets 4299883  bytes 542934103 (517.7 MiB)

        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

ifpps --dev eth0 --promisc

  3.10.0-693.11.6.el7.x86_64, eth0 (hv_netvsc 10000Mbit/s link:yes), t=1000ms, cpus=4/4

  (consider to increase your sampling interval, e.g. -t 10000)

  rx:            0.078 MiB/t        514 pkts/t        275 drops/t          0 errors/t

  tx:            0.000 MiB/t          1 pkts/t          0 drops/t          0 errors/t

  rx:        90128.614 MiB    685967675 pkts    347143178 drops            0 errors

  tx:          517.788 MiB      4299901 pkts            0 drops            0 errors

  sys:             431 cs/t         152 procs           1 running          0 iowait

  mem:           3782M total      3577M used        1656M active       1631M inactive

  swap:         16375M total         0M used           0M cached

  cpu0 +:         0.0% usr/t       0.0% sys/t      100.0% idl/t         0.0% iow/t

  cpu1 |:         0.0% usr/t       0.0% sys/t      100.0% idl/t         0.0% iow/t

  cpu2 |:         0.0% usr/t       0.0% sys/t      100.0% idl/t         0.0% iow/t

  cpu3 -:         0.0% usr/t       0.0% sys/t      100.0% idl/t         0.0% iow/t

  avg:            0.0%             0.0%            100.0%               0.0%

  cpu0 +:            0 irqs/t                14 sirq rx/t                 0 sirq tx/t

  cpu1 |:            0 irqs/t                22 sirq rx/t                 0 sirq tx/t

  cpu2 |:            0 irqs/t               299 sirq rx/t                 0 sirq tx/t

  cpu3 -:            0 irqs/t                28 sirq rx/t                 0 sirq tx/t

  avg:               0.0                     90.8                         0.0

  cpu0 +:            0 irqs

  cpu1 |:            0 irqs

  cpu2 |:            0 irqs

  cpu3 -:            0 irqs

  avg:               0.0

While googling I came across a script https://github.com/netoptimizer/network-testing/blob/master/bin/softnet_stat.pl in an attempt to find the reason for the drops but nothing is shown as below while  "ifpps --dev eth0 --promisc"output shows drops

Moreover the output of command 

ethtool -S eth0

NIC statistics:

     tx_scattered: 0

     tx_no_memory: 0

     tx_no_space: 0

     tx_too_big: 0

     tx_busy: 0

     vf_rx_packets: 0

     vf_rx_bytes: 0

     vf_tx_packets: 0

     vf_tx_bytes: 0

     vf_tx_dropped: 0

     tx_queue_0_packets: 4262005

     tx_queue_0_bytes: 540057642

     rx_queue_0_packets: 554975976

     rx_queue_0_bytes: 75154134866

     tx_queue_1_packets: 10016

     tx_queue_1_bytes: 577068

     rx_queue_1_packets: 39786263

     rx_queue_1_bytes: 5886530842

     tx_queue_2_packets: 9938

     tx_queue_2_bytes: 573708

     rx_queue_2_packets: 45523991

     rx_queue_2_bytes: 6339758425

     tx_queue_3_packets: 9752

     tx_queue_3_bytes: 562584

     rx_queue_3_packets: 44568047

     rx_queue_3_bytes: 6938650998

Thanks in advance and apologies if I have missed something.

Regards

N