Netplay does not work [$50]

[hooby3dfx]

This issue is intended to represent the problems related to netplay on this core when running on a RPi3 & equivalents.
I will be putting a bounty on this!

Problem 1: Crash when starting netplay host
Found on Lakka 2.0 / Retroarch 1.5
Can be reproduced by starting any psx game after starting netplay host.
Before any client even joins the emulator will start lagging heavily for a few seconds and then crash.
"Killed" is printed when running retroarch -v when it stops.

Problem 2: Performance likely to be slow
State save/load should be optimized so that netplay is possible and not laggy.

Problem 3: ??
There are likely to be other issues related to netplay...

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There is a $50 open bounty on this issue. Add to the bounty at Bountysource.

[andres-asm]

does rewind work?
try with skip bios

[hooby3dfx]

When rewind is enabled the game starts slowing down but it does seem to work.
Skip BIOS is already enabled by default.

[ghost]

Try increasing your latency frames in the network/netplay settings to something near/above the actual latency between you and the other player.

[ghost]

It lags exactly the same on the raspberry pi 3 as well. I think it's a retroarch issue.

[Darknior]

Arg so bad if this feature not working fine on PSX :(
I think rewind must be desactivated on network play, so strange to use it with a friend not here with you, and i don't know how his LR will understand a rewwind action ?

[ghost]

The rewind option is disabled as default on the raspberry pi 3 and still lags. There's no option to skip bios.

[ghost]

there is a Reset() call inside the loadstate function, removing that should make rewind work. also did netplay though its slow and desyncs alot, it works.

is there a callback to know if libretro is running in "netplay" mode?