[Open] Warping / Desync in multiplayer

[EinsteinEP]

I've occasionally encountered this before, but I just had a really bad night of it, so I thought I'd finally make a report.

 

In DCS World multiplayer, I am experiencing significant warping/desync of other player vehicles units in the game.

 

I've posted images and videos on the SimHQ thread here: http://simhq.com/forum/ubbthreads.php/topics/3948773/Re:_Spring_2014_SimHQ/DCS_Fly-#Post3948773

 

Here's a link to the youtube, though:

 

Pretty dramatic stuff.

 

OK, now for the details behind the pics and videos:

 

Configuration: I am running a completely stock i7 950 [edit: thanks for the correction, Eno!] on a completely stock Asus P6x58D-E with 6GBs of RAM. No tweaks or overclocks. Hard drive is a Crucial 480GB SSD, video card is a completely stock GTX 770.

 

Apps running at the time were TS3, FRAPS, and TrackIR. Antivirus is Avira Free. I was not recording video the whole time, only for the clips seen above.

 

DCS version is 1.2.8.27203, no mods (I know, I'm boring, right?).

 

I originally connected to the server at a network speed of "LAN", saw the desync, then exited out, set the speed to ASDL 2048, and reconnected. There was no reduction in the desync.

 

The server was Eno's Firehouse and there were several other people on at the same time (8 total? 10?).

 

I was flying the Su-25T and the A-10C and experienced desync equally in both.

 

Although I have this one example documented here, I do experience this effect from time to time. Not all the time, and not always this bad, but different servers, different aircraft, different missions, different pings, etc.

 

If there is any more info I could provide that could help resolve this for me, let me know and I'll gladly provide it.

Edited May 4, 2014 by EinsteinEP
wrong cpu callout

[Wolf Rider]

how is your LAN setup?

 

ie

onboard or separate NiC PCI or PCI-E card

Router

Modem

USB

Wired

Wireless

etc

[ENO]

I thought you were running a 950 EP? Stock speed is a bit faster though I think the chip architecture is the same.

[EinsteinEP]

how is your LAN setup?

 

Cable internet to the house, 12 Mb/s download, 8 Mb/s upload, pretty reliable and repeatable speeds although I haven't done a test in a month or so.

 

Cable goes to a modem, goes directly to a Linksys WRTG wireless router (also completely stock).

 

A hard wire goes from the router, into the wall, out to a distribution panel with a switch. From that switch back into the wall, out to my office/gaming room to another switch. There are two PCs, a printer, and a cloud drive on that switch, but only my gaming PC and the cloud drive were on.

[EinsteinEP]

Additional note, I flew again later in the day - same DCS, same server, same PC, same mission, same everything - and had no desync/warping issues.

 

The PC had been rebooted in the meantime, but no configuration changes or installs.

[EinsteinEP]

I thought you were running a 950 EP? Stock speed is a bit faster though I think the chip architecture is the same.

Yup, you're right Eno - I've got an i7 950 in my machine running at 3.07GHz.

 

64-bit Win 7, too.

[txmtb]

Maybe try a line test like http://www.pingtest.net/ to see if you are dropping packets or have bad jitter might help.

 

Edit: or not, your other posts just came in.

[Shaman]

Issue confirmed for 1.2.8 DCSW.

 

SA-SIM.com JWGCI event

http://sa-sim.com/?p=7384

has been postponed after two attempts to host event on <51>SERVER for 30 clients. Desyncs were so severe we couldn't continue and worst we have seen so far in years.

 

Multiplayer for DCSW 1.2.8 is broken, there is no way to continue competitive flying at this stage.

Edited May 5, 2014 by Shaman

[ENO]

I believe it... EP has reported it but during the fly in several people mentioned it was glitching / warping very noticeably. I didn't see anything because I'm connected via LAN to the server computer...

[NineLine]

How detail heavy was the mission, how many units? Lots of triggers, scripts, etc? Is it a mission you can share, PM at least if you dont want to share it publicly?

 

Also, anyone that has seen this issue, can you do me a simple favour? Play the first mission in the F-15C campaign, let me know what your FPS are at the start and at the end. I know this is single player, but just humour me :)

Edited May 6, 2014 by NineLine

[Shaman]

How detail heavy was the mission, how many units? Lots of triggers, scripts, etc? Is it a mission you can share, PM at least if you dont want to share it publicly?

 

Also, anyone that has seen this issue, can you do me a simple favour? Play the first mission in the F-15C campaign, let me know what your FPS are at the start and at the end. I know this is single player, but just humour me :)

 

Yep, awful. By the time I RTB,it dropped to 10-15, I had to fight terrible frame rate on approach and landing. Things deteriorated with time...

I usually fly at 40-60, WTF?! (where's that frame)

[NineLine]

Yep, awful. By the time I returned it dropped to 10-15.

I usually fly at 40-60, WTF?!

 

 

I am hoping its a hint to a related issue. I will add it to my report if I get a few more confirmations, thanks shamandgg!

[Shaman]

Sure thing, thanks for helping too,

..campaign mission #1, F-15C...

and it was just familiarization flight, there was like nothing going on to kill these frames below my normal average - at least from players perspective.

[NineLine]

Sure thing, thanks for helping too,

..campaign mission #1, F-15C...

and it was just familiarization flight, there was like nothing going on to kill these frames below my normal average - at least from players perspective.

 

There are a lot of units I believe, but I dont know what the source of the issue is. Its been like this for a bit.

[BaD CrC]

Strange,

 

Just finished a 4 days 32 players LAN in 1.2.8, settings at ADSL2048 and it was the best multiplayer experience we ever had with no lag and no server crash AT ALL during all the 3~4 hours missions (about 8 to 9 on 4 days).

[NineLine]

It would be interesting to compare SimHQ's mission with one you guys used, also, could you take the F-15C Campaign challenge? Fly the 1st mission and see if you FPS change by the end. Its possible its old mission issues, or a unit used in one and not the other that is the source...

 

Strange,

 

Just finished a 4 days 32 players LAN in 1.2.8, settings at ADSL2048 and it was the best multiplayer experience we ever had with no lag and no server crash AT ALL during all the 3~4 hours missions (about 8 to 9 on 4 days).

[tysonbishop964]

Could the problem just be the PC slowing down due to external processes and rubber banding? Ive experienced this problem only as a host, never as a client.

 

Also, Sith you're from Surrey, awesome.

[X-man]

The SA-SIM mission was fairly light. No moving ground units, two target areas with a few air defence units each. Some Long range SAM sites and all the client planes. Only AI was AWACS and tanker on both sides.

[Breakshot]

Guys at ED.

 

Please look into the enormous desync issues in 1.2.8.

 

Something in the last patch made large scale MP unplayable. We are getting ghost aircraft and phoney kills being made with planes flying like the undead after that. Kill messages are also sometimes showing late by 5 mins.

 

This can be confirmed especially during last GCI weekend organised by SA magazine, 104th and 51st.

 

I am sure many pilots can bring forth their tracks and ACMIs to help debug this issue.

 

There is something seriously wrong, and it must be fixed for the sake of MP.