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Strange networking issue possibly regarding Windows 10
05-09-2021, 04:46 AM (This post was last modified: 05-09-2021 05:58 AM by AdamN.)
Post: #4
RE: Strange networking issue possibly regarding Windows 10
Since both of your friends are using Win10 but only one (Friend B) have the issue, that means the issue is on your Friend B side, most-likely due to blocked ports (either by router, ISP, or network security software)

Try this to find out whether your Friend B have blocked port or not:
1). Let your Friend B host built-in Adhoc Server on his side.
2). You and Friend A connects to Friend B's Adhoc Server.
3). Ask your Friend B to check the Log Console to see if the Adhoc Server can detects anyone joining or not (other than him self).
If no body can connect to Friend B's Adhoc Server that means your Friend B have blocked ports,
if it's, you should ask Friend B to recheck everything that could block ports, may be he have internet/network security blocking the ports on his Win10, while it was disabled (or not installed) on his Win7.
Adhoc games need all players to have open ports, not only the host.

Also, regarding buffer size, we don't use system's default buffer size, we use the buffer size set by the game (different game use different buffer size) but multiplied by a certain number to prevent stuttering and disconnection issue on high latency network (internet), on a real PSP the buffer size probably not being multiplied because the latency is low on LAN so dropped packets can be resent faster.
Basically with small buffer size you'll get stutters due to dropped packets when the buffer is full, since high latency takes longer time for a packet to arrived when that packet is dropped due to full buffer, it will takes extra time to resend the packet due to the latency, and some games will not render the frame until it get all the state of each players.
Increasing buffer size can makes things smoother, but having too large buffer will introduce delays, because the most recent game's state will be queue far at the end in the buffer while the one you're seeing on screen is the state at the front (sender's older state)
Lowering the buffer size will cause packets to be dropped more often, especially on high latency because there could be a few more packets on-the-fly compared to low latency, this will cause stutters since the sender need to resend those dropped packets again, and could introduce disconnection if the game can't handle too many lost/dropped packets, but when that packet can be delivered successfully it will be close to the most recent state because the queue is not long.

My Modified PPSSPP :
==============
Win32&64: https://www.dropbox.com/s/2t3mtdhb0f045cn/PPSSPP_1.11-testbuild_Win32x64.zip?dl=0
Android(ARMv7): https://www.dropbox.com/s/b41bm43mtn1gpnn/PPSSPP_1.11-testbuild_ARMv7.apk?dl=0
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RE: Strange networking issue possibly regarding Windows 10 - AdamN - 05-09-2021 04:46 AM

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