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  1. Qt
  2. QTBUG-97797

QBluetoothDeviceDiscoveryAgent take CPU/Ram usage to 100%

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Details

    • Windows
    • 7287a6c7c9 (qt/qtconnectivity/6.4) 9ab5122091 (qt/qtconnectivity/dev) 7287a6c7c9 (qt/tqtc-qtconnectivity/6.4) 9ab5122091 (qt/tqtc-qtconnectivity/dev) a8dd5a7c5b (qt/qtconnectivity/6.3) d06ce6c88f (qt/tqtc-qtconnectivity/6.2)

    Description

      I am using example project lowenergyscanner of QT. I want to rescan device after each 10s. So I added below line to at the end of function Device::deviceScanFinished()

      QTimer::singleShot(10000, this, &Device::startDeviceDiscovery);

      I connect my LE headset to Windows OS

      After that I run lowenergyscanner, after about 45 minutes then CPU usage up to 100%.

      I see CPU used by Device Association Service increases gradually 

      Attachments

        1. image-2021-10-27-18-30-14-838.png
          183 kB
          Nhung Pham
        2. image-2021-10-27-18-31-50-606.png
          25 kB
          Nhung Pham
        3. Screenshot from 2021-12-16 16-34-06.png
          15 kB
          Ivan Solovev
        4. Screenshot from 2021-12-16 16-33-43.png
          7 kB
          Ivan Solovev

        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-99284 Bluetooth LE crashed/hang while discovery devices

          • 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; Flaky tests; 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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            People

              ablasche Alex Blasche
              nhungpham Nhung Pham
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              Dates

                Created:
                Updated:
                Resolved: