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FPS Degradation on Long Flight

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  • S Online
    S Online
    SinkRate
    wrote last edited by
    #3

    Thanks Nick! That's a bit counterintuitive, as C-States is a power-saving function that allows the CPU to basically "rest" threads that aren't being used. You'd think that would make performance worse, not better 😃

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    • O Online
      O Online
      Outermarker
      wrote last edited by
      #4

      I'm sad to report that I encountered the same on my first flight yesterday, I landed with 10 FPS after 1:35h...immediately had flashbacks to this issue that I had with the Bonanza and TBM that eventually fixed itself...I'll see if that's active in my BIOS and then try another flight.

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      • O Online
        O Online
        Outermarker
        wrote last edited by
        #5

        I've enabled the C-States in BIOS and just finished a beautiful 3:30h flight.
        This time I did not have FPS degradation over time but towards the end of the flight I did encounter the significant Main Thread and Manipulators spikes every second or so you mentioned.
        This ended once parked and I turned off the avionics. It's certainly not great if the sim lags once every second but for now I'll take it over 10 FPS.

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        • C Offline
          C Offline
          Chimaeira
          wrote last edited by
          #6

          I am also noticing performance degradation over time. At the end of my 2h20m flight I was at 21fps. I play in VR but normally I can reach at least a stable 40fps. Not sure if a BIOS setting will do the trick for me as I am using Intel not AMD.

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          • MarionetteworkM Offline
            MarionetteworkM Offline
            Marionettework
            wrote last edited by
            #7

            I”ve also had such a flight after I landed at a major airport and then flew again in the same session. The framerate was really bad on the return flight. I’ll check the fps more closely if I see this again. Of course who knows if this is just a general MSFS issue.

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            • Black SquareB Offline
              Black SquareB Offline
              Black Square
              Black Square Developer
              wrote last edited by
              #8

              Not to complain too, but it's incredible that we can get this kind of differing behavior on different systems when Asobo forces us all to update, and there are only Windows systems in play. After the one report of performance degradation I received last week, I did flights up to six hours on my machine with zero loss of performance. I also exchanged modified versions of the aircraft with the tester to pinpoint the issue. We stopped when his problem was alleviated by the BIOS change.

              I have an idea of where this is coming from, but once again, these things are so hard to troubleshoot when there are only a single digit percent of users who exhibit the problem. I'm happy to walk anyone through some troubleshooting here if you're willing to make some edits to the code. We might be able to find an exact cause for this (most likely in Asobo's map drawing or database loading code) any alleviate it.

              O Q 2 Replies Last reply
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              • L Offline
                L Offline
                LSilva
                wrote last edited by
                #9

                Same here, FPS dropped from ~90 to ~55 after about an hour, with the mentioned red spikes in the graphs. I enabled C-States in BIOS and so far (about 2 hours into a test flight) I haven't seen any performance degradation.

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                • Black SquareB Offline
                  Black SquareB Offline
                  Black Square
                  Black Square Developer
                  wrote last edited by
                  #10

                  Thanks for another data point. I haven't been able to find any information on what the "manipulators" thread really pertains to, so I will report this to Asobo and see if they have any advice or information.

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                  • S Online
                    S Online
                    SinkRate
                    wrote last edited by
                    #11

                    Just a question for everyone. How many of you have Toolbar Pushback installed? Apparently it can cause this exact issue with certain addons, and it just so happens that my Starship longhaul was my first flight after installing it. I've uninstalled it and will see what happens, but I'm just wondering how many of us having this issue are also using that addon.

                    MarionetteworkM 1 Reply Last reply
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                    • Black SquareB Black Square

                      Not to complain too, but it's incredible that we can get this kind of differing behavior on different systems when Asobo forces us all to update, and there are only Windows systems in play. After the one report of performance degradation I received last week, I did flights up to six hours on my machine with zero loss of performance. I also exchanged modified versions of the aircraft with the tester to pinpoint the issue. We stopped when his problem was alleviated by the BIOS change.

                      I have an idea of where this is coming from, but once again, these things are so hard to troubleshoot when there are only a single digit percent of users who exhibit the problem. I'm happy to walk anyone through some troubleshooting here if you're willing to make some edits to the code. We might be able to find an exact cause for this (most likely in Asobo's map drawing or database loading code) any alleviate it.

                      O Online
                      O Online
                      Outermarker
                      wrote last edited by
                      #12

                      @Black-Square Sure, I'd be happy to make some edits for troubleshooting

                      @SinkRate I don't have that installed and I generally try to run my sim as lean as possible, only activating the add-ons I really need for the specific flight using AddonLinker

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                      • S Sunake referenced this topic
                      • Black SquareB Black Square

                        Not to complain too, but it's incredible that we can get this kind of differing behavior on different systems when Asobo forces us all to update, and there are only Windows systems in play. After the one report of performance degradation I received last week, I did flights up to six hours on my machine with zero loss of performance. I also exchanged modified versions of the aircraft with the tester to pinpoint the issue. We stopped when his problem was alleviated by the BIOS change.

                        I have an idea of where this is coming from, but once again, these things are so hard to troubleshoot when there are only a single digit percent of users who exhibit the problem. I'm happy to walk anyone through some troubleshooting here if you're willing to make some edits to the code. We might be able to find an exact cause for this (most likely in Asobo's map drawing or database loading code) any alleviate it.

                        Q Offline
                        Q Offline
                        Qazme
                        wrote last edited by
                        #13

                        @Black-Square said in FPS Degradation on Long Flight:

                        Not to complain too, but it's incredible that we can get this kind of differing behavior on different systems when Asobo forces us all to update, and there are only Windows systems in play. After the one report of performance degradation I received last week, I did flights up to six hours on my machine with zero loss of performance. I also exchanged modified versions of the aircraft with the tester to pinpoint the issue. We stopped when his problem was alleviated by the BIOS change.

                        I have an idea of where this is coming from, but once again, these things are so hard to troubleshoot when there are only a single digit percent of users who exhibit the problem. I'm happy to walk anyone through some troubleshooting here if you're willing to make some edits to the code. We might be able to find an exact cause for this (most likely in Asobo's map drawing or database loading code) any alleviate it.

                        I commented on another thread about this, I completed 2x a little over 5 hours flights yesterday and on release day I did numerous 1.5-2 hour flights, without restarting the sim just a shut down, start up, fly next leg, and have not had this issue. So I'll throw another data point out there maybe?

                        Windows 11, 2024 SU2 AMD 9950x3d, RTX5090, 64GB ram - running in triple 4K. So I'm taxing the simulator, this plane, and my machine about as hard as you can push everything and I've seen no issues at all with performance. In fact this is probably the smoothest plane in my entire fleet.

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                        • S Online
                          S Online
                          SinkRate
                          wrote last edited by
                          #14

                          I'll add another datapoint as well. I've removed Toolbar Pushback after reading several reports of it causing exactly this issue with certain addons. It appears to have completely resolved my issue. Did a 2.5hr flight last night with no issues at all, doing a 4.5hr flight now and will report back.

                          Black SquareB 1 Reply Last reply
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                          • S SinkRate

                            I'll add another datapoint as well. I've removed Toolbar Pushback after reading several reports of it causing exactly this issue with certain addons. It appears to have completely resolved my issue. Did a 2.5hr flight last night with no issues at all, doing a 4.5hr flight now and will report back.

                            Black SquareB Offline
                            Black SquareB Offline
                            Black Square
                            Black Square Developer
                            wrote last edited by
                            #15

                            @SinkRate Thank you for this. Hopefully anyone coming here might tell us if they have the same experience with Toolbar Pushback. I will also ask the original tester who brought this to my attention if he can try this too.

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                            • F Offline
                              F Offline
                              Flys787
                              wrote last edited by
                              #16

                              Maybe this is not the correct thread, but I was having severe stuttering issues that rendered the Starship unflyable. I raised my Rolling Cache from 100gb to 256gb(the max allowed) and the plane worked flawlessly. What a joy to have this amazing and unique airplane in the sim.

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                              • S SinkRate

                                Just a question for everyone. How many of you have Toolbar Pushback installed? Apparently it can cause this exact issue with certain addons, and it just so happens that my Starship longhaul was my first flight after installing it. I've uninstalled it and will see what happens, but I'm just wondering how many of us having this issue are also using that addon.

                                MarionetteworkM Offline
                                MarionetteworkM Offline
                                Marionettework
                                wrote last edited by
                                #17

                                @SinkRate said in FPS Degradation on Long Flight:

                                Just a question for everyone. How many of you have Toolbar Pushback installed? Apparently it can cause this exact issue with certain addons, and it just so happens that my Starship longhaul was my first flight after installing it. I've uninstalled it and will see what happens, but I'm just wondering how many of us having this issue are also using that addon.

                                I also have Toolbar Pushback installed. I'll try with and without and report back if I see the FPS issue again.

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                                • S Online
                                  S Online
                                  SinkRate
                                  wrote last edited by
                                  #18

                                  I wish I could say that removing toolbar pushback fixed things, but I can confirm that the issue is still present without it. It happens after Starship has been loaded up and operated continuously for around 8 hours. Just did Gander to Keflavik, then Keflavik to London. Each leg about 4.5hrs, with an hour on the ground in Keflavik. Right around 3 hours into the second leg, performance began dropping steadily. Maybe a memory leak somewhere?

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                                  • O Online
                                    O Online
                                    Outermarker
                                    wrote last edited by
                                    #19

                                    I never used Toolbar Pushback to begin with and still have degrading FPS and/or MainThread lag spikes.

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                                    • Black SquareB Offline
                                      Black SquareB Offline
                                      Black Square
                                      Black Square Developer
                                      wrote last edited by
                                      #20

                                      Okay, anyone who wants to test this for me, here is the first thing that I would try. It's extremely simple.

                                      Locate ...\bksq-aircraft-starship\html_ui\Pages\VCockpit\Instruments\NavSystems\bksq-aircraft-starship\MFDmapConfig.json

                                      Change preventLabelOverlap to false. That's it.

                                      There is a chance that you will have to drag the aircraft's layout.json on top of the MSFSLayoutGenerator afterwards, but only in MSFS 2024.

                                      If that doesn't work...

                                      I have already heard confirmation that removing both ND's and the MFD from each panel.cfg eliminates the problem, but it would be nice to get some additional confirmations that this is indeed where the problem lies.

                                      To do this, you can either remove or comment out the three [VCockpit] entries in each panel.cfg (or in only one aircraft, if you're feeling confident of which is which) that include "MFD", or "ND". No renumbering in the file is required. Comments can be made by beginning each line with // or ;.

                                      After that, I'm afraid that it will take some volunteers to solve this one again. If any of you have already written to Just Flight about the waypoint deletion CTD, and also experience this problem, then let me know.

                                      Much appreciation again. As you might imagine, these bugs that only affect some number of users, and none of my beta testers can be a real pain to track down, so I am very thankful for your willingness to help.

                                      O 1 Reply Last reply
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                                      • S Online
                                        S Online
                                        SinkRate
                                        wrote last edited by
                                        #21

                                        Thanks for putting so much effort in here Nick. Can you explain what the consequences of deleting those entries from the panel.cfg are?

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                                        • Black SquareB Offline
                                          Black SquareB Offline
                                          Black Square
                                          Black Square Developer
                                          wrote last edited by
                                          #22

                                          That will simply remove the ND and MFD from the aircraft completely (you will get white screens in the cockpit, which, if I'm not being too cheeky, is a great excuse to practice your reversionary modes). Like I said, I already had confirmation that the problem lies with the ND or MFD, but I would like to have more than one data point.

                                          The first, extremely simple test would rule out one thing that I changed/created in the MFD map, but not the ND. If it doesn't fix the problem, then I will know where else to look.

                                          Of course, it makes little sense that this is another problem in Starship that only affects some users, but that's software, I suppose.

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