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    Please do not post a support request without first reading and following the advice in https://retropie.org.uk/forum/topic/3/read-this-first

    Retroarch 1.7.5 causing FPS drops for CPS 3 games

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    cps3retroarch 1.7.5
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    • G
      grant2258 Banned
      last edited by

      When an emulator improves sometimes it comes with a cost of speed. Other times its speed up hacks accidentally removed. Retropie runs on more than a pi.

      If this problems exists on more powerful machines it would be a problem at that point.

      DarksaviorD 1 Reply Last reply Reply Quote 0
      • RedBatmanR
        RedBatman
        last edited by

        Hi I just wanted to say I found a fix. I downloaded Ir-fba-alpha2012. Once I used this my CPS3 games were back to 60fps with no audio stutters or anything. So just to let this be known that if FBA 2.97.43 ever gets fixed again or its still causing issues then FBA 2012 is now needed for CPS3 games now for raspberry pi users.

        1 Reply Last reply Reply Quote 0
        • DarksaviorD
          Darksavior @grant2258
          last edited by

          @grant2258 Yes, that's what I experienced with the 4player Konami games. I need to use fba2012 for my pi2 (when I was using it). Still, I'd like a definitive answer if the cps3 problem is a mistake, or just emulation accuracy making it slower.

          1 Reply Last reply Reply Quote 0
          • G
            grant2258 Banned
            last edited by

            I only use that core havent looked at the code base to be honest just check the history in the cps3 driver in github to see the recent changes here.

            https://github.com/libretro/fbalpha/commits/master/src/burn/drv/cps3/cps3run.cpp

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            • G
              grant2258 Banned
              last edited by

              you could try revert d313472bf07332ee429a80f906252dca348975e5 commit compile and see how it runs

              https://github.com/libretro/fbalpha/commit/d313472bf07332ee429a80f906252dca348975e5#diff-d51bfb6a692321f4224209e955b76d48

              DarksaviorD RedBatmanR 2 Replies Last reply Reply Quote 0
              • DarksaviorD
                Darksavior @grant2258
                last edited by

                @grant2258 No idea how to do that.

                1 Reply Last reply Reply Quote 0
                • RedBatmanR
                  RedBatman @grant2258
                  last edited by

                  @grant2258 said in Retroarch 1.7.5 causing FPS drops for CPS 3 games:

                  you could try revert d313472bf07332ee429a80f906252dca348975e5 commit compile and see how it runs

                  https://github.com/libretro/fbalpha/commit/d313472bf07332ee429a80f906252dca348975e5#diff-d51bfb6a692321f4224209e955b76d48

                  I don't know how to do that either. But if FBA 2012 works good still then I'm fine with it, just as long as the current fba doesn't get any worse.

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                  • D
                    DarishZone Banned
                    last edited by

                    There's a way to revert to an older version of Retroarch?

                    1 Reply Last reply Reply Quote 0
                    • UDb23U
                      UDb23 @RedBatman
                      last edited by

                      @RedBatman A new version is available. Is the issue still there ?

                      1 Reply Last reply Reply Quote 0
                      • DarksaviorD
                        Darksavior
                        last edited by Darksavior

                        I retested using lr-fbalpha 2.97.44 from source. No change. To compare the differences to .42, using my pi3b+ overclocked to 1450, it runs as fast as a stock pi3 non + used to run at which is 60fps most of the time with dips of ~59.5-.7.

                        1 Reply Last reply Reply Quote 0
                        • B
                          barbudreadmon
                          last edited by

                          Ok, i didn't know about the speed regression. There was indeed a huge CPS3 patch a few weeks ago to fix some bugs (it was mostly for jojoba actually, until very recently the combo meter in this game wasn't working properly in any emulator, see https://mamedev.emulab.it/haze/2018/10/02/little-changes-part-2/ for the news). I'll look if something can be done about it, however i won't revert a fixed code to a buggy code, as far as i understand this bug is not even happening if you own a rpi3b+ or if you overclock your rpi3...

                          FBNeo developer - github - forum

                          DarksaviorD 1 Reply Last reply Reply Quote 1
                          • DarksaviorD
                            Darksavior @barbudreadmon
                            last edited by Darksavior

                            Pi3b nonplus at 1300 with SF3:
                            .44 from source using default compile: Supers drop to ~58.x fps.
                            .44 from source using altered compile settings: Supers drop to ~59.xfps.

                            I believe this is the part that helps but I'll post the patches link for system.sh. I basically added all the green text and removed the red text. I replaced -O2 with -O3. YMMV. Supposedly -O3 " there's known issues in GCC 6.3.0 with some of the optimizations it enables."
                            + __default_cflags="-O3 -march=armv8-a+crc -mtune=cortex-a53 -mfpu=neon-fp-armv8 -mfloat-abi=hard -ftree-vectorize -funsafe-math-optimizations -funroll-loops -funswitch-loops"

                            https://gist.github.com/GrieverV/b3d1a8e2c23c295b802f9e33286437c6

                            B 1 Reply Last reply Reply Quote 0
                            • B
                              barbudreadmon @Darksavior
                              last edited by barbudreadmon

                              @Darksavior except if retropie build script is totally ignoring my fbalpha makefile, i think the relevant part in what you wrote is -funroll-loops -funswitch-loops :

                              • -ftree-vectorize is included in -O3, which is the fbalpha default
                              • afaik -funsafe-math-optimizations should only have an impact on games using a lot of arythmetic function, it shouldn't be the case for cps3 (on a sidenote, raiden2 uses them a lot)

                              Thanks for the information, i'll do some tests and if those flags are interesting speed-wise, i'll add them to default fbalpha cflags.

                              Edit : actually -funswitch-loops is also part of -O3, meaning only -funroll-loops is relevant.
                              Edit2 : i've been thinking for some time that this change is the culprit, so having a speedup with -funroll-loops makes a lot of sense actually.

                              FBNeo developer - github - forum

                              1 Reply Last reply Reply Quote 0
                              • B
                                barbudreadmon
                                last edited by

                                Do you guys have rewind disabled for cps3 ? While it was kinda ok to let it enabled previously, recent updates won't allow it anymore speedwise.

                                FBNeo developer - github - forum

                                DarksaviorD 1 Reply Last reply Reply Quote 0
                                • DarksaviorD
                                  Darksavior @barbudreadmon
                                  last edited by Darksavior

                                  @barbudreadmon It's disabled by default so it's not enabled for me.

                                  B 2 Replies Last reply Reply Quote 0
                                  • B
                                    barbudreadmon @Darksavior
                                    last edited by

                                    @Darksavior -funroll-loops is now part of the fbalpha makefile.

                                    FBNeo developer - github - forum

                                    1 Reply Last reply Reply Quote 1
                                    • B
                                      barbudreadmon @Darksavior
                                      last edited by

                                      @Darksavior Another commit was applied to the fbalpha cps3 codebase today, it appears part of the jojoba combo meter fix could be optimized. Let me know if the slowdowns still happen.

                                      FBNeo developer - github - forum

                                      DarksaviorD 1 Reply Last reply Reply Quote 0
                                      • DarksaviorD
                                        Darksavior @barbudreadmon
                                        last edited by

                                        @barbudreadmon No real change on the pi3b nonplus at 1300. SF3 dips to 59.x most of the time especially when doing a super. Funny, fba2012 isn't a stable 60fps either but it dips a lot less. Maybe this is the best it can be. Not even my pi3b+ at 1450 gets a stable 60fps in lr-fbalpha.

                                        B 1 Reply Last reply Reply Quote 0
                                        • B
                                          barbudreadmon @Darksavior
                                          last edited by

                                          @Darksavior cps3 refresh rate is actually 59.583393 (see http://adb.arcadeitalia.net/dettaglio_mame.php?game_name=sfiii&lang=en), so not having a stable 60fps is actually normal behavior.

                                          FBNeo developer - github - forum

                                          DarksaviorD 1 Reply Last reply Reply Quote 0
                                          • DarksaviorD
                                            Darksavior @barbudreadmon
                                            last edited by Darksavior

                                            @barbudreadmon That explains it. So at this point I just want no static, so I connected it to my main 4k tv at 1080p with audio instead of the 1440x900 monitor to test. Supers still get static and in one instance had a drop to 58fps but fba2012 is way more stable in the fps and no severe slowdowns when doing supers. As long as people have a viable alternative I'd consider this "done".

                                            Pi3b at 1300 users should use 2012. Pi3b+ users are fine.

                                            RedBatmanR 1 Reply Last reply Reply Quote 0
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