Hi Florin, >From my logs it seems that TSO is not on even when using the native driver, >logs attached below. I'm going to do a deeper dive into the various networking >layers involved in this setup, will post any interesting findings back on this >thread.
Thank you for all the help so far! Regards, Dom vpp# sh int Name Idx State MTU (L3/IP4/IP6/MPLS) Counter Count local0 0 down 0/0/0/0 vpp# create int virtio 0000:00:03.0 vpp# sh int Name Idx State MTU (L3/IP4/IP6/MPLS) Counter Count local0 0 down 0/0/0/0 virtio-0/0/3/0 1 down 9000/0/0/0 rx packets 999 rx bytes 60252 drops 999 ip4 6 vpp# set interface ip address virtio-0/0/3/0 10.0.0.152/24 vpp# set interface state virtio-0/0/3/0 up vpp# session enable vpp# sh int Name Idx State MTU (L3/IP4/IP6/MPLS) Counter Count local0 0 down 0/0/0/0 virtio-0/0/3/0 1 up 9000/0/0/0 rx packets 1017 rx bytes 61332 drops 1017 ip4 6 vpp# sh sess verbose 2 Thread 0: no sessions Thread 1: no sessions Thread 2: no sessions Thread 3: no sessions vpp# sh sess verbose 2 Thread 0: no sessions [1:0][T] 10.0.0.152:27761->10.0.0.156:5201 ESTABLISHED index: 0 cfg: flags: timers: snd_una 124 snd_nxt 124 snd_una_max 124 rcv_nxt 5 rcv_las 5 snd_wnd 29056 rcv_wnd 7999488 rcv_wscale 10 snd_wl1 4 snd_wl2 124 flight size 0 out space 4473 rcv_wnd_av 7999488 tsval_recent 244488841 tsecr 434592381 tsecr_last_ack 434592381 tsval_recent_age 2995 snd_mss 1448 rto 259 rto_boff 0 srtt 67 us 3.127 rttvar 48 rtt_ts 0.0000 rtt_seq 124 next_node 0 opaque 0x0 cong: none algo cubic cwnd 4473 ssthresh 2147483647 bytes_acked 0 cc space 4473 prev_cwnd 0 prev_ssthresh 0 snd_cong 3516215180 dupack 0 limited_tx 3516215180 rxt_bytes 0 rxt_delivered 0 rxt_head 3516215180 rxt_ts 434595747 prr_start 3516215180 prr_delivered 0 prr space 0 sboard: sacked 0 last_sacked 0 lost 0 last_lost 0 rxt_sacked 0 last_delivered 0 high_sacked 3516215180 is_reneging 0 cur_rxt_hole 4294967295 high_rxt 3516215180 rescue_rxt 3516215180 stats: in segs 6 dsegs 4 bytes 4 dupacks 0 out segs 7 dsegs 2 bytes 123 dupacks 0 fr 0 tr 0 rxt segs 0 bytes 0 duration 3.381 err wnd data below 0 above 0 ack below 0 above 0 pacer: rate 1430540 bucket 0 t/p 1.431 last_update 3.365 s idle 156 Rx fifo: cursize 0 nitems 7999999 has_event 0 head 4 tail 4 segment manager 2 vpp session 0 thread 1 app session 0 thread 0 ooo pool 0 active elts newest 4294967295 Tx fifo: cursize 0 nitems 7999999 has_event 0 head 123 tail 123 segment manager 2 vpp session 0 thread 1 app session 0 thread 0 ooo pool 0 active elts newest 4294967295 session: state: ready opaque: 0x0 flags: [1:1][T] 10.0.0.152:31516->10.0.0.156:5201 ESTABLISHED index: 1 cfg: flags: PSH pending timers: RETRANSMIT snd_una 455633510 snd_nxt 456069358 snd_una_max 456069358 rcv_nxt 1 rcv_las 1 snd_wnd 1575424 rcv_wnd 7999488 rcv_wscale 10 snd_wl1 1 snd_wl2 455633510 flight size 435848 out space 486 rcv_wnd_av 7999488 tsval_recent 244492205 tsecr 434595744 tsecr_last_ack 434595744 tsval_recent_age 4294966926 snd_mss 1448 rto 200 rto_boff 0 srtt 1 us 2.612 rttvar 1 rtt_ts 95.8681 rtt_seq 455697222 next_node 0 opaque 0x0 cong: none algo cubic cwnd 436334 ssthresh 333526 bytes_acked 2896 cc space 486 prev_cwnd 476467 prev_ssthresh 341803 snd_cong 419169974 dupack 0 limited_tx 2714252909 rxt_bytes 0 rxt_delivered 0 rxt_head 2714252909 rxt_ts 434595747 prr_start 418787702 prr_delivered 0 prr space 0 sboard: sacked 0 last_sacked 0 lost 0 last_lost 0 rxt_sacked 0 last_delivered 0 high_sacked 419169974 is_reneging 0 cur_rxt_hole 4294967295 high_rxt 418797838 rescue_rxt 418787701 stats: in segs 144873 dsegs 0 bytes 0 dupacks 2553 out segs 315278 dsegs 315277 bytes 456519685 dupacks 0 fr 12 tr 0 rxt segs 311 bytes 450328 duration 3.371 err wnd data below 0 above 0 ack below 0 above 0 pacer: rate 436334000 bucket 282 t/p 436.334 last_update 264 us idle 100 Rx fifo: cursize 0 nitems 7999999 has_event 0 head 0 tail 0 segment manager 2 vpp session 1 thread 1 app session 1 thread 0 ooo pool 0 active elts newest 0 Tx fifo: cursize 7999999 nitems 7999999 has_event 1 head 7633509 tail 7633508 segment manager 2 vpp session 1 thread 1 app session 1 thread 0 ooo pool 0 active elts newest 4294967295 session: state: ready opaque: 0x0 flags: Thread 1: active sessions 2 Thread 2: no sessions Thread 3: no sessions vpp# sh hardware-interfaces Name Idx Link Hardware local0 0 down local0 Link speed: unknown local virtio-0/0/3/0 1 up virtio-0/0/3/0 Link speed: unknown Ethernet address fa:16:3e:ad:17:4d VIRTIO interface instance 0 vpp# sh err Count Node Reason 1 ip4-glean ARP requests sent 5636293 session-queue Packets transmitted 1 tcp4-rcv-process Pure ACKs received 2 tcp4-syn-sent SYN-ACKs received 7 tcp4-established Packets pushed into rx fifo 2589847 tcp4-established Pure ACKs received 43700 tcp4-established Duplicate ACK 1 tcp4-established Resets received 52 tcp4-established Connection closed 1 tcp4-established FINs received 5636348 tcp4-output Packets sent 52 tcp4-output Resets sent 1 arp-reply ARP replies sent 90 arp-disabled ARP Disabled on this interface 149 ip4-input unknown ip protocol 1 ip4-input bad tcp checksum 1 ip4-input Multicast RPF check failed 1186 llc-input unknown llc ssap/dsap 7 ethernet-input no error 1 ethernet-input l3 mac mismatch 973 virtio-0/0/3/0-tx no free tx slots
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