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Message-Id: <201001240128.52570.denys@visp.net.lb>
Date: Sun, 24 Jan 2010 01:28:52 +0200
From: Denys Fedoryshchenko <denys@...p.net.lb>
To: "Ilpo Järvinen" <ilpo.jarvinen@...sinki.fi>
Cc: Damian Lukowski <damian@....rwth-aachen.de>,
Netdev <netdev@...r.kernel.org>,
David Miller <davem@...emloft.net>
Subject: Re: [PATCH] tcp: fix ICMP-RTO war
On Sunday 24 January 2010 00:34:43 Ilpo Järvinen wrote:
> Restored Damian cc, please keep them.
>
> On Sat, 23 Jan 2010, Denys Fedoryshchenko wrote:
> > On Tuesday 19 January 2010 13:17:51 you wrote:
> > > On Tue, 19 Jan 2010, Denys Fedoryshchenko wrote:
> > > > On Tuesday 19 January 2010 11:10:12 you wrote:
> > > > > Hi,
> > > > > thank you for testing. So srtt and rttvar is zero in any of those
> > > > > cases. Ilpo, it is a bug in tcp_rtt_estimator then, I suppose?
> > > > >
> > > > > There is also a code comment in tcp_input.c, saying:
> > > > > > * NOTE: clamping at TCP_RTO_MIN is not required, current algo
> > > > > > * guarantees that rto is higher.
> > > > >
> > > > > So we either fix tcp_rtt_estimator or simply clamp at TCP_RTO_MIN?
> > > > >
> > > > > Damian
> > > > >
> > > > > > On Monday 11 January 2010 15:02:34 you wrote:
> > > > > >> On Sat, 26 Dec 2009, Denys Fedoryshchenko wrote:
> > > > > >>> Few more dumps. I notice:
> > > > > >>> 1)Ack always equal 1
> > > > > >>> 2)It is usually first segment of data sent (?)
> > > > > >>>
> > > > > >>> Maybe some value not initialised properly?
> > > > > >>
> > > > > >> Can you see if the RTO lower bound is violated (I added some
> > > > > >> printing of vars there too already now if it turns out to be
> > > > > >> something):
> > > > > >>
> > > > > >> diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
> > > > > >> index 65b8ebf..d84469f 100644
> > > > > >> --- a/net/ipv4/tcp_ipv4.c
> > > > > >> +++ b/net/ipv4/tcp_ipv4.c
> > > >
> > > > As i see in code it is rounding RTO to minimum value.
> > > > It fixes my problem seems.
> > > >
> > > > Btw just a bit about my environment - wireless networks (sometimes
> > > > lossy!) with low speed (128-512Kbps) customers working over pppoe.
> > > > Maybe it will give a tip why rtt value is too low.
> > >
> > > What I find most strange in it is the fact that when it triggers for
> > > the first time, the srtt and mdev are zero, not some value in between 0
> > > and 200ms. Therefore I suspect that this case might be something that
> > > we've overlooked where srtt/mdev are not valid at all.
> > >
> > > Maybe the patch below helps...
> >
> > Seems after this patch (and debug patch with warnings) my dmesg is clean.
>
> Cool, thanks for testing.
>
> Dave, please send into stable too (besides net-2.6). If we want less strict
> state check we can continue playing with that in net-next, IMHO.
>
I extend a little bit debug to
printk("lower bound violation: %u code %u sk_state %u\n", icsk->icsk_rto,
code,sk->sk_state);
Here is result:
[ 566.990065] lower bound violation: 0 code 1 sk_state 1
[ 566.990111] rto: 200 (0 >> 3 + 0, 5) time: 266990 sent: 263925 pen: 1
383925 rem: 0
[ 570.058555] lower bound violation: 0 code 1 sk_state 1
[ 570.058603] rto: 200 (0 >> 3 + 0, 8) time: 270058 sent: 269790 pen: 1
272990 rem: 0
[ 570.058660] lower bound violation: 0 code 1 sk_state 1
[ 570.058698] rto: 200 (0 >> 3 + 0, 8) time: 270058 sent: 270058 pen: 1
270458 rem: 200
[ 573.122550] lower bound violation: 0 code 1 sk_state 1
[ 573.122626] rto: 200 (0 >> 3 + 0, 11) time: 273122 sent: 273058 pen: 1
276258 rem: 136
[ 573.122745] lower bound violation: 0 code 1 sk_state 1
[ 573.122815] rto: 200 (0 >> 3 + 0, 10) time: 273122 sent: 273058 pen: 1
273258 rem: 136
[ 573.122931] lower bound violation: 0 code 1 sk_state 1
[ 573.123001] rto: 200 (0 >> 3 + 0, 9) time: 273122 sent: 273058 pen: 1
273258 rem: 136
[ 576.304338] lower bound violation: 0 code 1 sk_state 1
[ 576.304423] rto: 200 (0 >> 3 + 0, 12) time: 276304 sent: 276059 pen: 1
279259 rem: 0
[ 576.326167] lower bound violation: 0 code 1 sk_state 1
[ 576.326251] rto: 200 (0 >> 3 + 0, 12) time: 276326 sent: 276304 pen: 1
276704 rem: 178
[ 579.360343] lower bound violation: 0 code 1 sk_state 1
[ 579.360427] rto: 200 (0 >> 3 + 0, 15) time: 279360 sent: 279304 pen: 1
282504 rem: 144
[ 582.566834] lower bound violation: 0 code 1 sk_state 1
[ 582.566919] rto: 200 (0 >> 3 + 0, 18) time: 282566 sent: 282304 pen: 1
285504 rem: 0
[ 582.567085] lower bound violation: 0 code 1 sk_state 1
[ 582.567162] rto: 200 (0 >> 3 + 0, 18) time: 282567 sent: 282567 pen: 1
282967 rem: 200
[ 582.567280] lower bound violation: 0 code 1 sk_state 1
[ 582.567351] rto: 200 (0 >> 3 + 0, 17) time: 282567 sent: 282567 pen: 1
282767 rem: 200
[ 585.649877] lower bound violation: 0 code 1 sk_state 1
[ 585.649962] rto: 200 (0 >> 3 + 0, 20) time: 285649 sent: 285567 pen: 1
288767 rem: 118
[ 585.650097] lower bound violation: 0 code 1 sk_state 1
[ 585.650178] rto: 200 (0 >> 3 + 0, 19) time: 285650 sent: 285567 pen: 1
285768 rem: 117
[ 588.836754] lower bound violation: 0 code 1 sk_state 1
[ 588.836845] rto: 200 (0 >> 3 + 0, 22) time: 288836 sent: 288567 pen: 1
291767 rem: 0
[ 588.836970] lower bound violation: 0 code 1 sk_state 1
[ 588.837042] rto: 200 (0 >> 3 + 0, 22) time: 288836 sent: 288836 pen: 1
289236 rem: 200
[ 591.902908] lower bound violation: 0 code 1 sk_state 1
[ 591.902996] rto: 200 (0 >> 3 + 0, 25) time: 291902 sent: 291837 pen: 1
295037 rem: 135
[ 591.903129] lower bound violation: 0 code 1 sk_state 1
[ 591.903205] rto: 200 (0 >> 3 + 0, 24) time: 291903 sent: 291837 pen: 1
292038 rem: 134
[ 595.091391] lower bound violation: 0 code 1 sk_state 1
[ 595.091477] rto: 200 (0 >> 3 + 0, 27) time: 295091 sent: 294837 pen: 1
298037 rem: 0
[ 595.091627] lower bound violation: 0 code 1 sk_state 1
[ 595.091702] rto: 200 (0 >> 3 + 0, 27) time: 295091 sent: 295091 pen: 1
295491 rem: 200
[ 598.141828] lower bound violation: 0 code 1 sk_state 1
[ 598.141913] rto: 200 (0 >> 3 + 0, 30) time: 298141 sent: 298091 pen: 1
301291 rem: 150
[ 598.142043] lower bound violation: 0 code 1 sk_state 1
[ 598.142114] rto: 200 (0 >> 3 + 0, 29) time: 298141 sent: 298091 pen: 1
298291 rem: 150
[ 598.142252] lower bound violation: 0 code 1 sk_state 1
[ 598.142344] rto: 200 (0 >> 3 + 0, 28) time: 298142 sent: 298091 pen: 1
298291 rem: 149
[ 601.146649] lower bound violation: 0 code 1 sk_state 1
[ 601.146734] rto: 200 (0 >> 3 + 0, 31) time: 301146 sent: 301091 pen: 1
304291 rem: 145
[ 601.178998] lower bound violation: 0 code 1 sk_state 1
[ 601.179090] rto: 200 (0 >> 3 + 0, 30) time: 301179 sent: 301091 pen: 1
301291 rem: 112
[ 601.179227] lower bound violation: 0 code 1 sk_state 1
[ 601.179298] rto: 200 (0 >> 3 + 0, 29) time: 301179 sent: 301091 pen: 1
301291 rem: 112
[ 604.193304] lower bound violation: 0 code 1 sk_state 1
[ 604.193389] rto: 200 (0 >> 3 + 0, 32) time: 304193 sent: 304091 pen: 1
307291 rem: 98
[ 604.193518] lower bound violation: 0 code 1 sk_state 1
[ 604.193589] rto: 200 (0 >> 3 + 0, 31) time: 304193 sent: 304091 pen: 1
304291 rem: 98
[ 604.193706] lower bound violation: 0 code 1 sk_state 1
[ 604.193776] rto: 200 (0 >> 3 + 0, 30) time: 304193 sent: 304091 pen: 1
304291 rem: 98
[ 607.341327] lower bound violation: 0 code 1 sk_state 1
[ 607.341412] rto: 200 (0 >> 3 + 0, 33) time: 307341 sent: 307091 pen: 1
310291 rem: 0
[ 607.370345] lower bound violation: 0 code 1 sk_state 1
[ 607.370427] rto: 200 (0 >> 3 + 0, 33) time: 307370 sent: 307341 pen: 1
307741 rem: 171
[ 607.370657] lower bound violation: 0 code 1 sk_state 1
[ 607.370730] rto: 200 (0 >> 3 + 0, 32) time: 307370 sent: 307341 pen: 1
307541 rem: 171
[ 610.437075] lower bound violation: 0 code 1 sk_state 1
[ 610.437161] rto: 200 (0 >> 3 + 0, 35) time: 310437 sent: 310341 pen: 1
313541 rem: 104
[ 610.437302] lower bound violation: 0 code 1 sk_state 1
[ 610.437374] rto: 200 (0 >> 3 + 0, 34) time: 310437 sent: 310341 pen: 1
310541 rem: 104
[ 610.437497] lower bound violation: 0 code 1 sk_state 1
[ 610.437567] rto: 200 (0 >> 3 + 0, 33) time: 310437 sent: 310341 pen: 1
310541 rem: 104
[ 613.429680] lower bound violation: 0 code 1 sk_state 1
[ 613.429770] rto: 200 (0 >> 3 + 0, 36) time: 313429 sent: 313341 pen: 1
316541 rem: 112
[ 613.429899] lower bound violation: 0 code 1 sk_state 1
[ 613.429970] rto: 200 (0 >> 3 + 0, 35) time: 313429 sent: 313341 pen: 1
313541 rem: 112
[ 613.430087] lower bound violation: 0 code 1 sk_state 1
[ 613.430164] rto: 200 (0 >> 3 + 0, 34) time: 313430 sent: 313341 pen: 1
313542 rem: 111
[ 616.644279] lower bound violation: 0 code 1 sk_state 1
[ 616.644364] rto: 200 (0 >> 3 + 0, 37) time: 316644 sent: 316341 pen: 1
319541 rem: 0
[ 616.644500] lower bound violation: 0 code 1 sk_state 1
[ 616.644572] rto: 200 (0 >> 3 + 0, 37) time: 316644 sent: 316644 pen: 1
317044 rem: 200
[ 616.644689] lower bound violation: 0 code 1 sk_state 1
[ 616.644760] rto: 200 (0 >> 3 + 0, 36) time: 316644 sent: 316644 pen: 1
316844 rem: 200
[ 617.028542] rto: 120000 (788 >> 3 + 266, 10) time: 317028 sent: 313993 pen:
1 433993 rem: 116965
[ 619.711969] lower bound violation: 0 code 1 sk_state 1
[ 619.712050] rto: 200 (0 >> 3 + 0, 39) time: 319712 sent: 319644 pen: 1
322844 rem: 132
[ 619.712169] lower bound violation: 0 code 1 sk_state 1
[ 619.712240] rto: 200 (0 >> 3 + 0, 38) time: 319712 sent: 319644 pen: 1
319844 rem: 132
[ 619.712364] lower bound violation: 0 code 1 sk_state 1
[ 619.712435] rto: 200 (0 >> 3 + 0, 37) time: 319712 sent: 319644 pen: 1
319844 rem: 132
[ 622.908447] lower bound violation: 0 code 1 sk_state 1
[ 622.908531] rto: 200 (0 >> 3 + 0, 40) time: 322908 sent: 322644 pen: 1
325844 rem: 0
[ 622.909274] lower bound violation: 0 code 1 sk_state 1
[ 622.909347] rto: 200 (0 >> 3 + 0, 40) time: 322909 sent: 322908 pen: 1
323308 rem: 199
[ 622.914930] lower bound violation: 0 code 1 sk_state 1
[ 622.915014] rto: 200 (0 >> 3 + 0, 39) time: 322914 sent: 322908 pen: 1
323108 rem: 194
[ 625.975145] lower bound violation: 0 code 1 sk_state 1
[ 625.975232] rto: 200 (0 >> 3 + 0, 42) time: 325975 sent: 325909 pen: 1
329109 rem: 134
[ 625.975350] lower bound violation: 0 code 1 sk_state 1
[ 625.975422] rto: 200 (0 >> 3 + 0, 41) time: 325975 sent: 325909 pen: 1
326109 rem: 134
[ 625.975538] lower bound violation: 0 code 1 sk_state 1
[ 625.975609] rto: 200 (0 >> 3 + 0, 40) time: 325975 sent: 325909 pen: 1
326109 rem: 134
[ 629.187199] lower bound violation: 0 code 1 sk_state 1
[ 629.187286] rto: 200 (0 >> 3 + 0, 43) time: 329187 sent: 328909 pen: 1
332109 rem: 0
[ 629.187454] lower bound violation: 0 code 1 sk_state 1
[ 629.187529] rto: 200 (0 >> 3 + 0, 43) time: 329187 sent: 329187 pen: 1
329587 rem: 200
[ 629.187646] lower bound violation: 0 code 1 sk_state 1
[ 629.187717] rto: 200 (0 >> 3 + 0, 42) time: 329187 sent: 329187 pen: 1
329387 rem: 200
[ 632.232822] lower bound violation: 0 code 1 sk_state 1
[ 632.232907] rto: 200 (0 >> 3 + 0, 45) time: 332232 sent: 332187 pen: 1
335387 rem: 155
[ 632.250500] lower bound violation: 0 code 1 sk_state 1
[ 632.250585] rto: 200 (0 >> 3 + 0, 44) time: 332250 sent: 332187 pen: 1
332388 rem: 137
[ 632.250714] lower bound violation: 0 code 1 sk_state 1
[ 632.250785] rto: 200 (0 >> 3 + 0, 43) time: 332250 sent: 332187 pen: 1
332387 rem: 137
[ 635.247889] lower bound violation: 0 code 1 sk_state 1
[ 635.247974] rto: 200 (0 >> 3 + 0, 46) time: 335247 sent: 335187 pen: 1
338387 rem: 140
[ 635.248416] lower bound violation: 0 code 1 sk_state 1
[ 635.248490] rto: 200 (0 >> 3 + 0, 45) time: 335248 sent: 335187 pen: 1
335387 rem: 139
[ 635.251046] lower bound violation: 0 code 1 sk_state 1
[ 635.251122] rto: 200 (0 >> 3 + 0, 44) time: 335251 sent: 335187 pen: 1
335387 rem: 136
[ 638.434799] lower bound violation: 0 code 1 sk_state 1
[ 638.434883] rto: 200 (0 >> 3 + 0, 47) time: 338434 sent: 338187 pen: 1
341387 rem: 0
[ 638.435018] lower bound violation: 0 code 1 sk_state 1
[ 638.435090] rto: 200 (0 >> 3 + 0, 47) time: 338435 sent: 338434 pen: 1
338834 rem: 199
[ 638.435215] lower bound violation: 0 code 1 sk_state 1
[ 638.435993] rto: 200 (0 >> 3 + 0, 46) time: 338435 sent: 338434 pen: 1
338634 rem: 199
[ 641.501303] lower bound violation: 0 code 1 sk_state 1
[ 641.501380] rto: 200 (0 >> 3 + 0, 49) time: 341501 sent: 341435 pen: 1
344635 rem: 134
[ 641.501501] lower bound violation: 0 code 1 sk_state 1
[ 641.501571] rto: 200 (0 >> 3 + 0, 48) time: 341501 sent: 341435 pen: 1
341635 rem: 134
[ 641.501687] lower bound violation: 0 code 1 sk_state 1
[ 641.501757] rto: 200 (0 >> 3 + 0, 47) time: 341501 sent: 341435 pen: 1
341635 rem: 134
[ 644.518586] lower bound violation: 0 code 1 sk_state 1
[ 644.518672] rto: 200 (0 >> 3 + 0, 50) time: 344518 sent: 344435 pen: 1
347635 rem: 117
[ 644.518849] lower bound violation: 0 code 1 sk_state 1
[ 644.518930] rto: 200 (0 >> 3 + 0, 49) time: 344518 sent: 344435 pen: 1
344635 rem: 117
[ 644.519071] lower bound violation: 0 code 1 sk_state 1
[ 644.519158] rto: 200 (0 >> 3 + 0, 48) time: 344519 sent: 344435 pen: 1
344636 rem: 116
[ 647.725632] lower bound violation: 0 code 1 sk_state 1
[ 647.725717] rto: 200 (0 >> 3 + 0, 51) time: 347725 sent: 347435 pen: 1
350635 rem: 0
[ 647.725850] lower bound violation: 0 code 1 sk_state 1
[ 647.725921] rto: 200 (0 >> 3 + 0, 51) time: 347725 sent: 347725 pen: 1
348125 rem: 200
[ 647.729343] lower bound violation: 0 code 1 sk_state 1
[ 647.729417] rto: 200 (0 >> 3 + 0, 50) time: 347729 sent: 347725 pen: 1
347925 rem: 196
[ 650.787543] lower bound violation: 0 code 1 sk_state 1
[ 650.787619] rto: 200 (0 >> 3 + 0, 53) time: 350787 sent: 350726 pen: 1
353926 rem: 139
[ 650.798651] lower bound violation: 0 code 1 sk_state 1
[ 650.798749] rto: 200 (0 >> 3 + 0, 52) time: 350798 sent: 350726 pen: 1
350926 rem: 128
[ 650.805039] lower bound violation: 0 code 1 sk_state 1
[ 650.805123] rto: 200 (0 >> 3 + 0, 51) time: 350805 sent: 350726 pen: 1
350926 rem: 121
[ 653.801712] lower bound violation: 0 code 1 sk_state 1
[ 653.801788] rto: 200 (0 >> 3 + 0, 54) time: 353801 sent: 353726 pen: 1
356926 rem: 125
[ 653.801937] lower bound violation: 0 code 1 sk_state 1
[ 653.802023] rto: 200 (0 >> 3 + 0, 53) time: 353802 sent: 353726 pen: 1
353926 rem: 124
[ 653.802475] lower bound violation: 0 code 1 sk_state 1
[ 653.802548] rto: 200 (0 >> 3 + 0, 52) time: 353802 sent: 353726 pen: 1
353926 rem: 124
[ 656.985567] lower bound violation: 0 code 1 sk_state 1
[ 656.985653] rto: 200 (0 >> 3 + 0, 55) time: 356985 sent: 356726 pen: 1
359926 rem: 0
[ 656.986226] lower bound violation: 0 code 1 sk_state 1
[ 656.986299] rto: 200 (0 >> 3 + 0, 55) time: 356986 sent: 356985 pen: 1
357385 rem: 199
[ 656.986416] lower bound violation: 0 code 1 sk_state 1
[ 656.986486] rto: 200 (0 >> 3 + 0, 54) time: 356986 sent: 356985 pen: 1
357185 rem: 199
[ 660.042091] lower bound violation: 0 code 1 sk_state 1
[ 660.042168] rto: 200 (0 >> 3 + 0, 57) time: 360042 sent: 359985 pen: 1
363185 rem: 143
[ 660.042286] lower bound violation: 0 code 1 sk_state 1
[ 660.042357] rto: 200 (0 >> 3 + 0, 56) time: 360042 sent: 359985 pen: 1
360185 rem: 143
[ 660.076230] lower bound violation: 0 code 1 sk_state 1
[ 660.076315] rto: 200 (0 >> 3 + 0, 55) time: 360076 sent: 359985 pen: 1
360185 rem: 109
[ 663.256655] lower bound violation: 0 code 1 sk_state 1
[ 663.256731] rto: 200 (0 >> 3 + 0, 58) time: 363256 sent: 362985 pen: 1
366185 rem: 0
[ 663.341934] lower bound violation: 0 code 1 sk_state 1
[ 663.342010] rto: 200 (0 >> 3 + 0, 58) time: 363341 sent: 363256 pen: 1
363656 rem: 115
[ 663.428067] lower bound violation: 0 code 1 sk_state 1
[ 663.428156] rto: 200 (0 >> 3 + 0, 57) time: 363428 sent: 363256 pen: 1
363457 rem: 28
[ 666.308896] lower bound violation: 0 code 1 sk_state 1
[ 666.308980] rto: 200 (0 >> 3 + 0, 60) time: 366308 sent: 366256 pen: 1
369456 rem: 148
[ 666.309110] lower bound violation: 0 code 1 sk_state 1
[ 666.309186] rto: 200 (0 >> 3 + 0, 59) time: 366309 sent: 366256 pen: 1
366457 rem: 147
[ 666.309315] lower bound violation: 0 code 1 sk_state 1
[ 666.309386] rto: 200 (0 >> 3 + 0, 58) time: 366309 sent: 366256 pen: 1
366456 rem: 147
[ 669.519782] lower bound violation: 0 code 1 sk_state 1
[ 669.519866] rto: 200 (0 >> 3 + 0, 61) time: 369519 sent: 369256 pen: 1
372456 rem: 0
[ 669.520011] lower bound violation: 0 code 1 sk_state 1
[ 669.520083] rto: 200 (0 >> 3 + 0, 61) time: 369520 sent: 369519 pen: 1
369919 rem: 199
[ 669.520206] lower bound violation: 0 code 1 sk_state 1
[ 669.520286] rto: 200 (0 >> 3 + 0, 60) time: 369520 sent: 369519 pen: 1
369719 rem: 199
[ 672.641672] lower bound violation: 0 code 1 sk_state 1
[ 672.641756] rto: 200 (0 >> 3 + 0, 63) time: 372641 sent: 372519 pen: 1
375719 rem: 78
[ 672.642325] lower bound violation: 0 code 1 sk_state 1
[ 672.642407] rto: 200 (0 >> 3 + 0, 62) time: 372642 sent: 372519 pen: 1
372719 rem: 77
[ 672.642524] lower bound violation: 0 code 1 sk_state 1
[ 672.642596] rto: 200 (0 >> 3 + 0, 61) time: 372642 sent: 372519 pen: 1
372719 rem: 77
[ 675.789437] lower bound violation: 0 code 1 sk_state 1
[ 675.789522] rto: 200 (0 >> 3 + 0, 64) time: 375789 sent: 375519 pen: 1
378719 rem: 0
[ 675.789657] lower bound violation: 0 code 1 sk_state 1
[ 675.789727] rto: 200 (0 >> 3 + 0, 64) time: 375789 sent: 375789 pen: 1
376189 rem: 200
[ 675.813158] lower bound violation: 0 code 1 sk_state 1
[ 675.813242] rto: 200 (0 >> 3 + 0, 63) time: 375813 sent: 375789 pen: 1
375989 rem: 176
[ 678.902625] lower bound violation: 0 code 1 sk_state 1
[ 678.902689] rto: 200 (0 >> 3 + 0, 66) time: 378902 sent: 378789 pen: 1
381989 rem: 87
[ 678.902808] lower bound violation: 0 code 1 sk_state 1
[ 678.902869] rto: 200 (0 >> 3 + 0, 65) time: 378902 sent: 378789 pen: 1
378989 rem: 87
[ 678.902967] lower bound violation: 0 code 1 sk_state 1
[ 678.903027] rto: 200 (0 >> 3 + 0, 64) time: 378903 sent: 378789 pen: 1
378989 rem: 86
[ 682.086610] lower bound violation: 0 code 1 sk_state 1
[ 682.086673] rto: 200 (0 >> 3 + 0, 67) time: 382086 sent: 381789 pen: 1
384989 rem: 0
[ 682.086823] lower bound violation: 0 code 1 sk_state 1
[ 682.086885] rto: 200 (0 >> 3 + 0, 67) time: 382086 sent: 382086 pen: 1
382486 rem: 200
[ 682.086988] lower bound violation: 0 code 1 sk_state 1
[ 682.087042] rto: 200 (0 >> 3 + 0, 66) time: 382087 sent: 382086 pen: 1
382286 rem: 199
[ 685.177400] lower bound violation: 0 code 1 sk_state 1
[ 685.177460] rto: 200 (0 >> 3 + 0, 69) time: 385177 sent: 385086 pen: 1
388286 rem: 109
[ 685.177566] lower bound violation: 0 code 1 sk_state 1
[ 685.177630] rto: 200 (0 >> 3 + 0, 68) time: 385177 sent: 385086 pen: 1
385286 rem: 109
[ 685.177734] lower bound violation: 0 code 1 sk_state 1
[ 685.177790] rto: 200 (0 >> 3 + 0, 67) time: 385177 sent: 385086 pen: 1
385286 rem: 109
[ 688.339503] lower bound violation: 0 code 1 sk_state 1
[ 688.339565] rto: 200 (0 >> 3 + 0, 70) time: 388339 sent: 388086 pen: 1
391286 rem: 0
[ 688.339684] lower bound violation: 0 code 1 sk_state 1
[ 688.339745] rto: 200 (0 >> 3 + 0, 70) time: 388339 sent: 388339 pen: 1
388739 rem: 200
[ 688.339844] lower bound violation: 0 code 1 sk_state 1
[ 688.339896] rto: 200 (0 >> 3 + 0, 69) time: 388339 sent: 388339 pen: 1
388539 rem: 200
[ 691.925180] lower bound violation: 0 code 1 sk_state 1
[ 691.925242] rto: 200 (0 >> 3 + 0, 72) time: 391925 sent: 391339 pen: 1
394539 rem: 0
[ 692.010074] lower bound violation: 0 code 1 sk_state 1
[ 692.010131] rto: 200 (0 >> 3 + 0, 72) time: 392009 sent: 391925 pen: 1
392325 rem: 116
[ 692.096188] lower bound violation: 0 code 1 sk_state 1
[ 692.096254] rto: 200 (0 >> 3 + 0, 71) time: 392096 sent: 391925 pen: 1
392126 rem: 29
[ 694.474680] lower bound violation: 0 code 1 sk_state 1
[ 694.474742] rto: 200 (0 >> 3 + 0, 73) time: 394474 sent: 393325 pen: 1
394925 rem: 0
[ 694.475751] lower bound violation: 0 code 1 sk_state 1
[ 694.475810] rto: 200 (0 >> 3 + 0, 73) time: 394475 sent: 394474 pen: 1
394874 rem: 199
[ 694.475918] lower bound violation: 0 code 1 sk_state 1
[ 694.475975] rto: 200 (0 >> 3 + 0, 72) time: 394475 sent: 394474 pen: 1
394674 rem: 199
[ 697.572814] lower bound violation: 0 code 1 sk_state 1
[ 697.572877] rto: 200 (0 >> 3 + 0, 75) time: 397572 sent: 397474 pen: 1
400674 rem: 102
[ 697.572986] lower bound violation: 0 code 1 sk_state 1
[ 697.573052] rto: 200 (0 >> 3 + 0, 74) time: 397573 sent: 397474 pen: 1
397674 rem: 101
[ 697.573159] lower bound violation: 0 code 1 sk_state 1
[ 697.573211] rto: 200 (0 >> 3 + 0, 73) time: 397573 sent: 397474 pen: 1
397674 rem: 101
[ 700.728072] lower bound violation: 0 code 1 sk_state 1
[ 700.728135] rto: 200 (0 >> 3 + 0, 76) time: 400728 sent: 400474 pen: 1
403674 rem: 0
[ 700.734010] lower bound violation: 0 code 1 sk_state 1
[ 700.734079] rto: 200 (0 >> 3 + 0, 76) time: 400734 sent: 400728 pen: 1
401128 rem: 194
[ 700.734191] lower bound violation: 0 code 1 sk_state 1
[ 700.734944] rto: 200 (0 >> 3 + 0, 75) time: 400734 sent: 400728 pen: 1
400928 rem: 194
[ 703.779459] lower bound violation: 0 code 1 sk_state 1
[ 703.779521] rto: 200 (0 >> 3 + 0, 78) time: 403779 sent: 403729 pen: 1
406929 rem: 150
[ 703.779628] lower bound violation: 0 code 1 sk_state 1
[ 703.779680] rto: 200 (0 >> 3 + 0, 77) time: 403779 sent: 403729 pen: 1
403929 rem: 150
[ 703.779797] lower bound violation: 0 code 1 sk_state 1
[ 703.779850] rto: 200 (0 >> 3 + 0, 76) time: 403779 sent: 403729 pen: 1
403929 rem: 150
--
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