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  1. Qt
  2. QTBUG-78483

Performance drops with multi-process appmanager

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Details

    • Linux/Wayland, Linux/X11

    Description

      The performance drops significantly when running the application using multi-process mode versus forcing single process mode.

      • Startup time is increased.
      • FPS drops to less than half.
      • CPU consumption sky-rocket. 

      It happens even on simple 3D presentations.

       

      Attached a simple project where this problem happens.

      Attachments

        1. Appman_multiprocess_app.7z
          125 kB
        2. log.txt
          72 kB
        3. multi-process_appman.jpg
          multi-process_appman.jpg
          146 kB
        4. multi-process_appman-launcher.jpg
          multi-process_appman-launcher.jpg
          251 kB
        5. multi-process.png
          multi-process.png
          34 kB
        6. qmlscene.png
          qmlscene.png
          50 kB
        7. Qt multiprocess sample app.zip
          11 kB
        8. Rectangle-Multi-process.PNG
          Rectangle-Multi-process.PNG
          95 kB
        9. Rectangle-Single-process.PNG
          Rectangle-Single-process.PNG
          80 kB
        10. single-process_appman.jpg
          single-process_appman.jpg
          180 kB
        11. single-process.png
          single-process.png
          34 kB
        12. slowman.tgz
          3 kB

        Issue Links

          depends on

          User Story - Created by Jira Software - do not edit or delete. Issue type for a user story. QT3DS-2038 Support customer project J

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Open
          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-82948 The new handling of Client Buffer Integration causes a crash

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Reported

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-76915 Animators in Wayland clients are broken

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed
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          Activity

            People

              qt.team.graphics.and.multimedia Qt Graphics Team
              mastambo Maycon Stamboroski
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              Dates

                Created:
                Updated:
                Resolved:

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