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Date: Fri, 13 Dec 2013 14:54:28 -0800 From: Eric Dumazet <eric.dumazet@...il.com> To: Michal Schmidt <mschmidt@...hat.com> Cc: "netdev@...r.kernel.org" <netdev@...r.kernel.org>, Eric Dumazet <edumazet@...gle.com> Subject: Re: sit tunnel slow since added GSO/TSO support On Fri, 2013-12-13 at 08:28 -0800, Eric Dumazet wrote: > On Fri, 2013-12-13 at 17:13 +0100, Michal Schmidt wrote: > > Hello, > > > > I've been experimenting with IPIP and SIT tunnels. Both of them > > had the support for GSO/TSO added recently, by commits: > > cb32f511a7 "ipip: add GSO/TSO support" > > 61c1db7fae "ipv6: sit: add GSO/TSO support" > > > > IPIP works fine for me. > > > > I am seeing very low TCP performance with SIT if TSO is enabled on the > > SIT interface. It does not matter if the underlying hardware supports > > NETIF_F_GSO_SIT or not (I have tested with bnx2x and tg3). > > Strange, my tests were done on bnx2x, and TSO was definitely working ... > > I'll take a look, thanks ! I tried the same setup than before and got good behavior on current net-next kernel modprobe sit ip link set sit0 up ip -6 addr add dev sit0 2002:af6:1153::/64 ip -6 ro add 2002:a00::/24 via fe80:: dev sit0 ./netperf -H 2002:af6:1154:: MIGRATED TCP STREAM TEST from ::0 (::) port 0 AF_INET6 to 2002:af6:1154:: () port 0 AF_INET6 Recv Send Send Socket Socket Message Elapsed Size Size Size Time Throughput bytes bytes bytes secs. 10^6bits/sec 87380 16384 16384 10.00 6703.45 14:51:59.664613 IP 10.246.17.83 > 10.246.17.84: IP6 2002:af6:1153::.47324 > 2002:af6:1154::.49917: S 4047734761:4047734761(0) win 28400 <mss 1420,sackOK,timestamp 3668787 0,nop,wscale 6> 14:51:59.664791 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: S 850000541:850000541(0) ack 4047734762 win 28160 <mss 1420,sackOK,timestamp 3668673 3668787,nop,wscale 6> 14:51:59.664825 IP 10.246.17.83 > 10.246.17.84: IP6 2002:af6:1153::.47324 > 2002:af6:1154::.49917: . ack 1 win 444 <nop,nop,timestamp 3668787 3668673> 14:51:59.664854 IP 10.246.17.83 > 10.246.17.84: IP6 2002:af6:1153::.47324 > 2002:af6:1154::.49917: . 1:14081(14080) ack 1 win 444 <nop,nop,timestamp 3668787 3668673> 14:51:59.665028 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 1409 win 484 <nop,nop,timestamp 3668673 3668787> 14:51:59.665030 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 2817 win 528 <nop,nop,timestamp 3668673 3668787> 14:51:59.665031 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 4225 win 572 <nop,nop,timestamp 3668673 3668787> 14:51:59.665051 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 5633 win 616 <nop,nop,timestamp 3668673 3668787> 14:51:59.665083 IP 10.246.17.83 > 10.246.17.84: IP6 2002:af6:1153::.47324 > 2002:af6:1154::.49917: . 14081:19713(5632) ack 1 win 444 <nop,nop,timestamp 3668788 3668673> 14:51:59.665052 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 7041 win 660 <nop,nop,timestamp 3668673 3668787> 14:51:59.665054 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 8449 win 704 <nop,nop,timestamp 3668673 3668787> 14:51:59.665080 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 9857 win 748 <nop,nop,timestamp 3668674 3668787> 14:51:59.665082 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 11265 win 792 <nop,nop,timestamp 3668674 3668787> 14:51:59.665083 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 12673 win 836 <nop,nop,timestamp 3668674 3668787> 14:51:59.665116 IP 10.246.17.83 > 10.246.17.84: IP6 2002:af6:1153::.47324 > 2002:af6:1154::.49917: . 19713:28161(8448) ack 1 win 444 <nop,nop,timestamp 3668788 3668673> 14:51:59.665101 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 14081 win 880 <nop,nop,timestamp 3668674 3668787> 14:51:59.665127 IP 10.246.17.83 > 10.246.17.84: IP6 2002:af6:1153::.47324 > 2002:af6:1154::.49917: . 28161:36609(8448) ack 1 win 444 <nop,nop,timestamp 3668788 3668674> 14:51:59.665177 IP 10.246.17.83 > 10.246.17.84: IP6 2002:af6:1153::.47324 > 2002:af6:1154::.49917: . 36609:42241(5632) ack 1 win 444 <nop,nop,timestamp 3668788 3668674> 14:51:59.665131 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 15489 win 924 <nop,nop,timestamp 3668674 3668788> 14:51:59.665133 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 16897 win 968 <nop,nop,timestamp 3668674 3668788> 14:51:59.665178 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 18305 win 1012 <nop,nop,timestamp 3668674 3668788> 14:51:59.665179 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 19713 win 1056 <nop,nop,timestamp 3668674 3668788> 14:51:59.665214 IP 10.246.17.83 > 10.246.17.84: IP6 2002:af6:1153::.47324 > 2002:af6:1154::.49917: . 42241:53505(11264) ack 1 win 444 <nop,nop,timestamp 3668788 3668674> 14:51:59.665227 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 21121 win 1100 <nop,nop,timestamp 3668674 3668788> 14:51:59.665248 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 22529 win 1144 <nop,nop,timestamp 3668674 3668788> 14:51:59.665249 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 23937 win 1188 <nop,nop,timestamp 3668674 3668788> 14:51:59.665273 IP 10.246.17.83 > 10.246.17.84: IP6 2002:af6:1153::.47324 > 2002:af6:1154::.49917: . 53505:61953(8448) ack 1 win 444 <nop,nop,timestamp 3668788 3668674> 14:51:59.665271 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 25345 win 1232 <nop,nop,timestamp 3668674 3668788> 14:51:59.665272 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 26753 win 1276 <nop,nop,timestamp 3668674 3668788> 14:51:59.665275 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 28161 win 1320 <nop,nop,timestamp 3668674 3668788> 14:51:59.665278 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 29569 win 1364 <nop,nop,timestamp 3668674 3668788> 14:51:59.665279 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 30977 win 1408 <nop,nop,timestamp 3668674 3668788> 14:51:59.665279 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 32385 win 1452 <nop,nop,timestamp 3668674 3668788> 14:51:59.665280 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 33793 win 1496 <nop,nop,timestamp 3668674 3668788> 14:51:59.665281 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 35201 win 1540 <nop,nop,timestamp 3668674 3668788> 14:51:59.665281 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 36609 win 1584 <nop,nop,timestamp 3668674 3668788> 14:51:59.665296 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 38017 win 1628 <nop,nop,timestamp 3668674 3668788> 14:51:59.665297 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 39425 win 1672 <nop,nop,timestamp 3668674 3668788> 14:51:59.665298 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 40833 win 1716 <nop,nop,timestamp 3668674 3668788> 14:51:59.665298 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 42241 win 1760 <nop,nop,timestamp 3668674 3668788> 14:51:59.665299 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 43649 win 1804 <nop,nop,timestamp 3668674 3668788> 14:51:59.665300 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 45057 win 1848 <nop,nop,timestamp 3668674 3668788> 14:51:59.665301 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 46465 win 1892 <nop,nop,timestamp 3668674 3668788> 14:51:59.665302 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 47873 win 1936 <nop,nop,timestamp 3668674 3668788> 14:51:59.665339 IP 10.246.17.83 > 10.246.17.84: IP6 2002:af6:1153::.47324 > 2002:af6:1154::.49917: . 61953:78849(16896) ack 1 win 444 <nop,nop,timestamp 3668788 3668674> 14:51:59.665313 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 49281 win 1980 <nop,nop,timestamp 3668674 3668788> 14:51:59.665314 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 50689 win 2024 <nop,nop,timestamp 3668674 3668788> 14:51:59.665316 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 52097 win 2068 <nop,nop,timestamp 3668674 3668788> 14:51:59.665320 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 53505 win 2112 <nop,nop,timestamp 3668674 3668788> 14:51:59.665322 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 54913 win 2156 <nop,nop,timestamp 3668674 3668788> 14:51:59.665362 IP 10.246.17.83 > 10.246.17.84: IP6 2002:af6:1153::.47324 > 2002:af6:1154::.49917: . 78849:98561(19712) ack 1 win 444 <nop,nop,timestamp 3668788 3668674> 14:51:59.665367 IP 10.246.17.83 > 10.246.17.84: IP6 2002:af6:1153::.47324 > 2002:af6:1154::.49917: P 98561:99969(1408) ack 1 win 444 <nop,nop,timestamp 3668788 3668674> 14:51:59.665344 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 56321 win 2200 <nop,nop,timestamp 3668674 3668788> 14:51:59.665345 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 57729 win 2244 <nop,nop,timestamp 3668674 3668788> 14:51:59.665347 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 59137 win 2288 <nop,nop,timestamp 3668674 3668788> 14:51:59.665347 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 60545 win 2332 <nop,nop,timestamp 3668674 3668788> 14:51:59.665348 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 61953 win 2376 <nop,nop,timestamp 3668674 3668788> 14:51:59.665411 IP 10.246.17.83 > 10.246.17.84: IP6 2002:af6:1153::.47324 > 2002:af6:1154::.49917: . 99969:130945(30976) ack 1 win 444 <nop,nop,timestamp 3668788 3668674> 14:51:59.665470 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 63361 win 2420 <nop,nop,timestamp 3668674 3668788> 14:51:59.665471 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 64769 win 2464 <nop,nop,timestamp 3668674 3668788> 14:51:59.665494 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 66177 win 2508 <nop,nop,timestamp 3668674 3668788> 14:51:59.665495 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 67585 win 2552 <nop,nop,timestamp 3668674 3668788> 14:51:59.665495 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 68993 win 2596 <nop,nop,timestamp 3668674 3668788> 14:51:59.665518 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 70401 win 2640 <nop,nop,timestamp 3668674 3668788> 14:51:59.665519 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 71809 win 2684 <nop,nop,timestamp 3668674 3668788> 14:51:59.665521 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 73217 win 2728 <nop,nop,timestamp 3668674 3668788> 14:51:59.665522 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 74625 win 2733 <nop,nop,timestamp 3668674 3668788> 14:51:59.665523 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 76033 win 2733 <nop,nop,timestamp 3668674 3668788> 14:51:59.665524 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 77441 win 2733 <nop,nop,timestamp 3668674 3668788> 14:51:59.665524 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 78849 win 2733 <nop,nop,timestamp 3668674 3668788> 14:51:59.665525 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 80257 win 2733 <nop,nop,timestamp 3668674 3668788> 14:51:59.665525 IP 10.246.17.84 > 10.246.17.83: IP6 2002:af6:1154::.49917 > 2002:af6:1153::.47324: . ack 81665 win 2733 <nop,nop,timestamp 3668674 3668788> What am I missing ? 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