Problem with new loco - possible OR bug?

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  • KingOfLions
    Member
    • Jan 2012
    • 22

    #1

    Problem with new loco - possible OR bug?

    Hi,

    I'm currently testing a new loco for MSTS/OR. Loco is already grouped to one object (except axles of course), painting is 2x2048, 1x512 transparent and a few 64 bitmaps. 4 axles (6 wheels + blind axle). Some planes are still automatic defaulted in their texture.
    Rail system is new (UKN-Track) with 2048 texture, but works fine in other configurations.
    Landscape ist default, height profile of mountain scenery, visibility 2km, no other objects along the track. Some portions of the track are still overlaped by landscape, but this also works in other configurations.
    Wagons have a relatively high object count (<10, also under construction), 1x2048 bitmap, work in other configuration.

    With this loco, OR periodically (every 30-60s) stops, sound crackles for about 5-10s. When resuming operation, wheel slip occurs, coupling compresses and stretches 3-4 times until back to normal operation. Previous to the error, frame rate is normal (around 30-40fps). Train maximum speed is 20kmh, so not really producing graphic load. Problem seems to occur more frequently when train maximum speed is exceeded (25-30 kmh).

    Looks like as if some internal process stops the simulator and causes stress to the OR system. One possible cause might be, that a lot of surface textures of the loco is currently automatically replaced by the partially transparent texture, what may cause high graphical calulation load. However, this is a problem that should be checked and probaby prevented in the software.

    Kind regards
    Alfred
  • KingOfLions
    Member
    • Jan 2012
    • 22

    #2
    Problem update für v0.8

    Hello again,

    the problem still remains, but has increased with v0.8. It now applies also to other locos that performed well in 0.7.

    PS: would be nice to get a statement from the OR team!

    Kind regards
    Alfred

    Comment

    • wacampbell
      Senior Member
      • Jun 2002
      • 492
      • BC, Canada

      #3
      This doesn't look like a known problem. To fix it we'll need enough info to replicate what you are experiencing. These things might help:

      OS: (e.g. XPSP3, Win7 64B, etc)

      Video Chipset:

      Route: (if not the one of the 6 microsoft routes, please name & indicate where it's available)

      Consist Info: (provide model info - especially engine)

      Activity: (if explore say so)

      OR log: OR will have left an OpenRailsLog.txt file on your desktop. Attach this file with your report ( some forum software may require you to zip the log )

      Comment

      • KingOfLions
        Member
        • Jan 2012
        • 22

        #4
        OS: Win7HPSP1 x64, latest MS Update state
        Graphics: NVIDIA Geforce 330, newest drivers
        Settings: AF 4x, FXAA on, Antialiasing 4x, Gamma on, Program settings used, tranparency multisampling, triple-buffer on, maximum performance, use 3D settings, single display mode, neg. LOD-bias allowed, texture filtering high quality, threaded yes, Vsync adaptive.
        Platform: Laptop Samsung RF510, i7 Q720 @ 1,6GHz, 6GB RAM

        Problem occurs with all routes and with all tested locos with OR V0.8.

        I can offer you to retest the problem with an US reference route if you like.
        Attached Files

        Comment

        • KingOfLions
          Member
          • Jan 2012
          • 22

          #5
          Additional information

          Newest information:

          The problem also occurs also if the train stands still.

          The problem seems to be in conjunction with sound. (currently not assured)

          The problem occurs a little bit more frequently depending on the objects in the scene, but seems not to be dependent on the amount and/or complexity of objects currently displayed.

          When the sound starts crackling, CPU usage on all CPUs cycles between 0% !!! and normal load, what leads to the guess that it might be in conjuncion with DMA.

          Typical sceanrio:
          OR starts up, delivering a frame rate >55 fps
          running the train a short distance (appr. 200m with 5km/h) or leaving OR on its own: frame rate decreases to <6fps.
          applying brakes releases the problem, frame rate goes up to >20fps
          releasing brakes and accelarte train: frame rate goes down again to 5-7fps within a few seconds
          each cycle of stopping an restarting the train causes the problem to get more worse, until frame rate ist as low as 4fps or the computer fully stops.
          even exiting the activity to the main menu does not correct the problem
          after restarting the activity, frame rate is as low as 20-25fps
          all applications on the computer are slowed down dramatically
          after a few seconds, especially when accelerating the train, the simulation almost stops with 4fps

          even fully restarting OR delivers ony a frame rate of appr. 40-45 fps, decrasing over a short period to 10fps

          System processes in task manager: OR runs with appr 30-40% processor load also in bad state

          System performance:
          working OR produces a system load around 50-60%
          bad state: system load remains around 96-98% (all cores)
          memory consumption is between 2 and 2,5GB on 4GB machine
          Last edited by KingOfLions; 11-02-2012, 07:25.

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