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| ID | Project | Category | View Status | Date Submitted | Last Update | ||||
|---|---|---|---|---|---|---|---|---|---|
| 0002362 | Spring engine | General | public | 2011-02-20 21:27 | 2011-08-02 20:13 | ||||
| Reporter | abma | ||||||||
| Assigned To | abma | ||||||||
| Priority | normal | Severity | crash | Reproducibility | have not tried | ||||
| Status | resolved | Resolution | fixed | ||||||
| Product Version | 0.82.7.1 | ||||||||
| Target Version | Fixed in Version | ||||||||
| Summary | 0002362: desync in online game with gentoo x86_64 | ||||||||
| Description | see attached files | ||||||||
| Tags | No tags attached. | ||||||||
| Checked infolog.txt for Errors | |||||||||
| Attached Files |
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 Notes |
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dansan (reporter) 2011-02-21 01:32 |
I just noticed that around the time of the game a p2p client was running in my network. I have no idea how much bandwidth it used... Anyways: if the desync looks like it could be explained by network latency (no idea if that can happen or seen in the log) than that is a possible explanation. |
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hoijui (reporter) 2011-03-26 11:24 |
no, that is not possible. desync can not be caused by network problems. |
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abma (administrator) 2011-03-26 12:17 |
maybe related? 0002338 |
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zerver (reporter) 2011-03-26 18:09 |
hm, why cannot network corruption cause a desync? network corruption isn't that unusual and spring provides no extra checksum protection iirc. |
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hoijui (reporter) 2011-04-03 10:04 |
because the underlying protocol does that for us. |
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abma (administrator) 2011-04-03 22:03 Last edited: 2011-04-03 22:05 |
just an idea: try to disable checksum offloading, by: sudo ethtool --offload eth0 rx off tx off |
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dansan (reporter) 2011-04-04 10:07 |
You mean the server or me? daniel@maya ~ $ sudo ethtool --show-offload eth0 Offload parameters for eth0: rx-checksumming: on tx-checksumming: on scatter-gather: on tcp-segmentation-offload: on udp-fragmentation-offload: off generic-segmentation-offload: on generic-receive-offload: on large-receive-offload: off rx-vlan-offload: off tx-vlan-offload: off ntuple-filters: off receive-hashing: on So it's on, and I could disable it, but I'd need a reason to do so, because the problem is: 1. I have no problems with other apps/protocols and 2. I cannot reproduce the desync (except by replaying the game). I get desyncs only like once in three month. Maybe you wanted to tell macbeth/0002338 to do that? |
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abma (administrator) 2011-04-04 12:32 Last edited: 2011-04-04 12:36 |
most other apps mostly don't use udp + their pakets are bigger. you can only desync in network games. desync means, your game and the game on an other host aren't in "sync"... just google for "udp offload checksum error" or something like that.. there are only 2 guys having this problem, so it seems, that its a very special problem. this bug could also be only a compiler-issue... |
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dansan (reporter) 2011-04-04 14:08 |
> you can only desync in network games Right... what I saw in the replay was only the message :) Where to go from here? I don't know how to reproduce the problem - not even on the same day on the same server... In case it happens sometimes - what exactly should I do (besides from infolog+mantis)? |
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abma (administrator) 2011-06-05 16:45 |
which boost-version do you have installed? |
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dansan (reporter) 2011-06-05 21:23 |
Back then: Thu Feb 3 14:07:31 2011 >>> dev-libs/boost-1.42.0-r2 Sat Feb 5 01:47:19 2011 >>> games-strategy/spring-0.82.7.1 Now: Sat May 7 21:38:58 2011 >>> dev-libs/boost-1.46.1 Tue May 17 23:37:46 2011 >>> games-strategy/spring-0.82.7.1 I haven't had a desync for months now. |
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abma (administrator) 2011-07-31 16:49 Last edited: 2011-07-31 16:50 |
that means with 1.42 you had desyncs and with 1.46 it works? |
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dansan (reporter) 2011-08-01 02:02 |
Cannot say... sorry... it was very rare then, and almost never happens now... not enough data.... Want me to investigate? I can compile spring against dev-libs/boost-1.42.0-r2 and see for some days/weeks if it makes any difference. |
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abma (administrator) 2011-08-01 11:08 |
i tested for myself, 1.46 seems to desync, too. was stdlibc++ updated? (part of g++) if so, from wich version to wich version? as these desyncs where so rare... its hard to find the cause then :-/ |
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abma (administrator) 2011-08-02 20:13 Last edited: 2011-08-02 20:13 |
desyncs should be fixed now in spring/master: https://github.com/spring/spring/commit/46a073e78f5c3092b0a59cb05e10adb5732ce066 |
| Notes |
| Issue History |
|||
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2011-02-20 21:27 | abma | New Issue | |
| 2011-02-20 21:27 | abma | File Added: synced-infolog.txt | |
| 2011-02-20 21:27 | abma | File Added: synced_20110220_211241_DesertSiege_v2_0.82.7.sdf | |
| 2011-02-20 21:37 | dansan | File Added: danchan_desynced_infolog.txt | |
| 2011-02-20 21:37 | dansan | File Added: danchan_desynced_20110220_211240_DesertSiege_v2_0.82.7.sdf | |
| 2011-02-21 01:32 | dansan | Note Added: 0006415 | |
| 2011-03-26 11:24 | hoijui | Note Added: 0006511 | |
| 2011-03-26 12:17 | abma | Note Added: 0006513 | |
| 2011-03-26 13:55 | abma | Severity | minor => crash |
| 2011-03-26 18:09 | zerver | Note Added: 0006516 | |
| 2011-03-31 00:54 | abma | Relationship added | related to 0002338 |
| 2011-04-03 10:04 | hoijui | Note Added: 0006526 | |
| 2011-04-03 22:03 | abma | Note Added: 0006531 | |
| 2011-04-03 22:05 | abma | Note Edited: 0006531 | |
| 2011-04-04 10:07 | dansan | Note Added: 0006532 | |
| 2011-04-04 12:32 | abma | Note Added: 0006533 | |
| 2011-04-04 12:33 | abma | Note Edited: 0006533 | |
| 2011-04-04 12:34 | abma | Note Edited: 0006533 | |
| 2011-04-04 12:35 | abma | Note Edited: 0006533 | |
| 2011-04-04 12:36 | abma | Note Edited: 0006533 | |
| 2011-04-04 12:36 | abma | Note Edited: 0006533 | |
| 2011-04-04 14:08 | dansan | Note Added: 0006534 | |
| 2011-06-05 16:45 | abma | Note Added: 0006704 | |
| 2011-06-05 21:23 | dansan | Note Added: 0006706 | |
| 2011-07-31 16:49 | abma | Note Added: 0007155 | |
| 2011-07-31 16:50 | abma | Note Edited: 0007155 | |
| 2011-08-01 02:02 | dansan | Note Added: 0007173 | |
| 2011-08-01 11:08 | abma | Note Added: 0007174 | |
| 2011-08-02 20:13 | abma | Note Added: 0007203 | |
| 2011-08-02 20:13 | abma | Status | new => resolved |
| 2011-08-02 20:13 | abma | Resolution | open => fixed |
| 2011-08-02 20:13 | abma | Assigned To | => abma |
| 2011-08-02 20:13 | abma | Note Edited: 0007203 | |
| Issue History |