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Gran Turismo PSP car sharing works unstable
02-01-2021, 02:05 AM (This post was last modified: 02-01-2021 02:30 AM by TheRacer28.)
Post: #1
Gran Turismo PSP car sharing works unstable
It has happened to me that many times the car sharing does not work and rarely does, I do not change my setting, I keep the same that I use when I play races and it works correctly, but when I want to share cars there is a problem to do it, when me and client we join the room stays on the screen of "Exchanging information" and does not go from there, a few times if it worked, but most of the time it does not work, there was even one time it worked, but since we could not complete the transfer (I had received the client's cars but he did not receive mine because he left the room during the transfer) we tried it again and it no longer worked, we tried like 3 times but nothing. Why is it sometimes that it works and it doesn't work? What can I do to make it work? By the way I use VPN (ZeroTier), sometimes I use UpNp which recently worked for me for sharing but I don't use it much because this one is also fickle and doesn't allow me to join rooms sometimes

This is my setting if you can detect that something is wrong:

Network:
- WLAN (Checked)
- WLAN Channel (Auto)
- Discord "Rich Presence" (Checked)
- Built in PRO Ad Hoc Server (Checked)
- IP Adress (My IP or Sushi cat server depending of the online method)
- UpNp (Checked or unchecked depending of the online method)
- Original UpNp Port (Checked)
- Port offset (1500)
- Minimum Timeout (0)
- TCP no delay (Unchecked)
- Forced first connect (Unchecked)

System:
- Fast memory (Unchecked)
- Ignore bad memory accesses (Checked)
- I/O on thread (Unchecked)
- Force real clock sync (Unchecked)
- CPU speed (222)
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02-01-2021, 06:55 AM (This post was last modified: 02-01-2021 06:59 AM by AdamN.)
Post: #2
RE: Gran Turismo PSP car sharing works unstable
There was an issue related to VPN and socket buffer size, apparently VPN doesn't work well with small buffer size, may be this game is using small buffer size for sharing cars.

May be i should add an option for user to change the minimum buffer size limit to see whether there are more issue related to buffer size or not...

Btw, you may want to enable/checked "Force real clock sync" for multiplayer, because it could help prevent desync on some games.

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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02-01-2021, 12:04 PM
Post: #3
RE: Gran Turismo PSP car sharing works unstable
We have tried with Force real clock sync but it does not work yet
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02-01-2021, 06:26 PM (This post was last modified: 02-01-2021 06:26 PM by Zinx777.)
Post: #4
RE: Gran Turismo PSP car sharing works unstable
There is also a framerate issue with this game.
If you play over the internet or maybe even locally the frame rate will drop to 30 almost all the time.
If you play on real PSPs the framerate will retain 60 fps most of the time.
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02-01-2021, 08:25 PM
Post: #5
RE: Gran Turismo PSP car sharing works unstable
How can I avoid frame rate drops? I have the auto frameskip disabled
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02-02-2021, 03:09 AM (This post was last modified: 02-02-2021 03:11 AM by AdamN.)
Post: #6
RE: Gran Turismo PSP car sharing works unstable
There were an issue of FPS drops in vulkan with this game but it got fixed as i remembered, may be try a different graphics backend to find the best one?
There were also an issue FPS drops related to OpenGL on AMD GPU on Windows, are you using AMD GPU such as Radeon? https://github.com/hrydgard/ppsspp/issues/13460

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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02-02-2021, 10:50 AM (This post was last modified: 02-02-2021 10:53 AM by TheRacer28.)
Post: #7
RE: Gran Turismo PSP car sharing works unstable
I'm using android with Vulkan
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