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QTimer doesn't work the expected way

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  • Christian EhrlicherC Offline
    Christian EhrlicherC Offline
    Christian Ehrlicher
    Lifetime Qt Champion
    wrote on last edited by
    #7

    Run your program with a debugger, stop the debugger when your program stops and take a look at the backtrace where it comes from.

    Qt Online Installer direct download: https://download.qt.io/official_releases/online_installers/
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    M 2 Replies Last reply
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    • Christian EhrlicherC Christian Ehrlicher

      Run your program with a debugger, stop the debugger when your program stops and take a look at the backtrace where it comes from.

      M Offline
      M Offline
      MasterBlade
      wrote on last edited by
      #8

      @Christian-Ehrlicher said in QTimer doesn't work the expected way:

      Run your program with a debugger, stop the debugger when your program stops and take a look at the backtrace where it comes from.

      I am currently running the program with QTCreator in debug mode. May I ask how to stop the debugger?

      jsulmJ 1 Reply Last reply
      0
      • Christian EhrlicherC Christian Ehrlicher

        Run your program with a debugger, stop the debugger when your program stops and take a look at the backtrace where it comes from.

        M Offline
        M Offline
        MasterBlade
        wrote on last edited by MasterBlade
        #9

        @Christian-Ehrlicher said in QTimer doesn't work the expected way:

        Run your program with a debugger, stop the debugger when your program stops and take a look at the backtrace where it comes from.

        Hi I have set the single shot duration to 10 secs and rerun the program. It pauses for 2 secs and the text disappeared at 10 sec.
        Does this mean there is a long latency when writing INI? I need to write 40 items to the INI file.

        1 Reply Last reply
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        • M MasterBlade

          @Christian-Ehrlicher said in QTimer doesn't work the expected way:

          Run your program with a debugger, stop the debugger when your program stops and take a look at the backtrace where it comes from.

          I am currently running the program with QTCreator in debug mode. May I ask how to stop the debugger?

          jsulmJ Offline
          jsulmJ Offline
          jsulm
          Lifetime Qt Champion
          wrote on last edited by
          #10

          @MasterBlade said in QTimer doesn't work the expected way:

          May I ask how to stop the debugger?

          Simply press the same button you used to start debugging...

          https://forum.qt.io/topic/113070/qt-code-of-conduct

          M 1 Reply Last reply
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          • jsulmJ jsulm

            @MasterBlade said in QTimer doesn't work the expected way:

            May I ask how to stop the debugger?

            Simply press the same button you used to start debugging...

            M Offline
            M Offline
            MasterBlade
            wrote on last edited by
            #11

            @jsulm said in QTimer doesn't work the expected way:

            @MasterBlade said in QTimer doesn't work the expected way:

            May I ask how to stop the debugger?

            Simply press the same button you used to start debugging...

            I paused the debugger, but didn't find many differences. Application output only has a single line. Where else should I check?

            15:16:35: Debugging starts
            
            jsulmJ 1 Reply Last reply
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            • M MasterBlade

              @jsulm said in QTimer doesn't work the expected way:

              @MasterBlade said in QTimer doesn't work the expected way:

              May I ask how to stop the debugger?

              Simply press the same button you used to start debugging...

              I paused the debugger, but didn't find many differences. Application output only has a single line. Where else should I check?

              15:16:35: Debugging starts
              
              jsulmJ Offline
              jsulmJ Offline
              jsulm
              Lifetime Qt Champion
              wrote on last edited by
              #12

              @MasterBlade said in QTimer doesn't work the expected way:

              Where else should I check?

              In the debugger. In debugger view there is "Debugger" section with the stack trace (select thread #1). You should really get familiar with the debugger.

              https://forum.qt.io/topic/113070/qt-code-of-conduct

              M 1 Reply Last reply
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              • jsulmJ jsulm

                @MasterBlade said in QTimer doesn't work the expected way:

                Where else should I check?

                In the debugger. In debugger view there is "Debugger" section with the stack trace (select thread #1). You should really get familiar with the debugger.

                M Offline
                M Offline
                MasterBlade
                wrote on last edited by
                #13

                @jsulm said in QTimer doesn't work the expected way:

                @MasterBlade said in QTimer doesn't work the expected way:

                Where else should I check?

                In the debugger. In debugger view there is "Debugger" section with the stack trace (select thread #1). You should really get familiar with the debugger.

                1.png

                jsulmJ 1 Reply Last reply
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                • M MasterBlade

                  @jsulm said in QTimer doesn't work the expected way:

                  @MasterBlade said in QTimer doesn't work the expected way:

                  Where else should I check?

                  In the debugger. In debugger view there is "Debugger" section with the stack trace (select thread #1). You should really get familiar with the debugger.

                  1.png

                  jsulmJ Offline
                  jsulmJ Offline
                  jsulm
                  Lifetime Qt Champion
                  wrote on last edited by
                  #14

                  @MasterBlade When exactly did you take this screen-shot? When your app was blocked? You also can check other threads.

                  https://forum.qt.io/topic/113070/qt-code-of-conduct

                  M 1 Reply Last reply
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                  • jsulmJ jsulm

                    @MasterBlade When exactly did you take this screen-shot? When your app was blocked? You also can check other threads.

                    M Offline
                    M Offline
                    MasterBlade
                    wrote on last edited by
                    #15

                    @jsulm said in QTimer doesn't work the expected way:

                    @MasterBlade When exactly did you take this screen-shot? When your app was blocked? You also can check other threads.

                    Yeah it was taken when the program was blocked.
                    Thread #1-5 looks the same to me.

                    Thread #6 and #7
                    2.png
                    3.png

                    #8 and #9 are same as #1-5

                    #10-13
                    357baa19-b6cd-45c4-815b-6d2fba72be71-image.png

                    #14
                    b4c07d35-4b68-45ef-80d9-11635f78c4e1-image.png

                    #15
                    1ac91703-d49f-4777-ba3f-11b4c1ca9c7a-image.png

                    jsulmJ 1 Reply Last reply
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                    • M MasterBlade

                      @jsulm said in QTimer doesn't work the expected way:

                      @MasterBlade When exactly did you take this screen-shot? When your app was blocked? You also can check other threads.

                      Yeah it was taken when the program was blocked.
                      Thread #1-5 looks the same to me.

                      Thread #6 and #7
                      2.png
                      3.png

                      #8 and #9 are same as #1-5

                      #10-13
                      357baa19-b6cd-45c4-815b-6d2fba72be71-image.png

                      #14
                      b4c07d35-4b68-45ef-80d9-11635f78c4e1-image.png

                      #15
                      1ac91703-d49f-4777-ba3f-11b4c1ca9c7a-image.png

                      jsulmJ Offline
                      jsulmJ Offline
                      jsulm
                      Lifetime Qt Champion
                      wrote on last edited by
                      #16

                      @MasterBlade Do you actually use threads in your app?

                      https://forum.qt.io/topic/113070/qt-code-of-conduct

                      M 1 Reply Last reply
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                      • jsulmJ jsulm

                        @MasterBlade Do you actually use threads in your app?

                        M Offline
                        M Offline
                        MasterBlade
                        wrote on last edited by
                        #17

                        @jsulm said in QTimer doesn't work the expected way:

                        @MasterBlade Do you actually use threads in your app?

                        I don't think I did. I don't know why there are so many threads.

                        jsulmJ 1 Reply Last reply
                        0
                        • M MasterBlade

                          @jsulm said in QTimer doesn't work the expected way:

                          @MasterBlade Do you actually use threads in your app?

                          I don't think I did. I don't know why there are so many threads.

                          jsulmJ Offline
                          jsulmJ Offline
                          jsulm
                          Lifetime Qt Champion
                          wrote on last edited by
                          #18

                          @MasterBlade That's normal. I just wanted to know whether you create threads also by yourself. From the stack trace I can't see anything helpful.

                          https://forum.qt.io/topic/113070/qt-code-of-conduct

                          M 1 Reply Last reply
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                          • jsulmJ jsulm

                            @MasterBlade That's normal. I just wanted to know whether you create threads also by yourself. From the stack trace I can't see anything helpful.

                            M Offline
                            M Offline
                            MasterBlade
                            wrote on last edited by
                            #19

                            @jsulm said in QTimer doesn't work the expected way:

                            @MasterBlade That's normal. I just wanted to know whether you create threads also by yourself. From the stack trace I can't see anything helpful.

                            There is one problem I found curious. I am also using QSettings to write INI files, and I found it quite slow. Usually takes like 2 secs to write. I didn't use QTimer in that code. So I guess if it's QSettings that caused the block.

                            jsulmJ 1 Reply Last reply
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                            • M MasterBlade

                              @jsulm said in QTimer doesn't work the expected way:

                              @MasterBlade That's normal. I just wanted to know whether you create threads also by yourself. From the stack trace I can't see anything helpful.

                              There is one problem I found curious. I am also using QSettings to write INI files, and I found it quite slow. Usually takes like 2 secs to write. I didn't use QTimer in that code. So I guess if it's QSettings that caused the block.

                              jsulmJ Offline
                              jsulmJ Offline
                              jsulm
                              Lifetime Qt Champion
                              wrote on last edited by
                              #20

                              @MasterBlade Where are the settings stored? Is it network drive, local drive, Windows registry?

                              https://forum.qt.io/topic/113070/qt-code-of-conduct

                              M 1 Reply Last reply
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                              • jsulmJ jsulm

                                @MasterBlade Where are the settings stored? Is it network drive, local drive, Windows registry?

                                M Offline
                                M Offline
                                MasterBlade
                                wrote on last edited by
                                #21

                                @jsulm said in QTimer doesn't work the expected way:

                                @MasterBlade Where are the settings stored? Is it network drive, local drive, Windows registry?

                                local hard disk in INI format

                                jsulmJ J.HilkJ 2 Replies Last reply
                                0
                                • M MasterBlade

                                  @jsulm said in QTimer doesn't work the expected way:

                                  @MasterBlade Where are the settings stored? Is it network drive, local drive, Windows registry?

                                  local hard disk in INI format

                                  jsulmJ Offline
                                  jsulmJ Offline
                                  jsulm
                                  Lifetime Qt Champion
                                  wrote on last edited by
                                  #22

                                  @MasterBlade It is really strange if it takes so long.

                                  https://forum.qt.io/topic/113070/qt-code-of-conduct

                                  M 1 Reply Last reply
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                                  • M MasterBlade

                                    @jsulm said in QTimer doesn't work the expected way:

                                    @MasterBlade Where are the settings stored? Is it network drive, local drive, Windows registry?

                                    local hard disk in INI format

                                    J.HilkJ Offline
                                    J.HilkJ Offline
                                    J.Hilk
                                    Moderators
                                    wrote on last edited by
                                    #23

                                    @MasterBlade QSettings is usually super quick,

                                    how big is the resulting ini file ending up ?
                                    Mb's ?


                                    Be aware of the Qt Code of Conduct, when posting : https://forum.qt.io/topic/113070/qt-code-of-conduct


                                    Q: What's that?
                                    A: It's blue light.
                                    Q: What does it do?
                                    A: It turns blue.

                                    M 2 Replies Last reply
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                                    • jsulmJ jsulm

                                      @MasterBlade It is really strange if it takes so long.

                                      M Offline
                                      M Offline
                                      MasterBlade
                                      wrote on last edited by
                                      #24

                                      @jsulm said in QTimer doesn't work the expected way:

                                      @MasterBlade It is really strange if it takes so long.

                                      Well actually I was storing it in OneDrive folder. Will that take longer?

                                      jsulmJ 1 Reply Last reply
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                                      • J.HilkJ J.Hilk

                                        @MasterBlade QSettings is usually super quick,

                                        how big is the resulting ini file ending up ?
                                        Mb's ?

                                        M Offline
                                        M Offline
                                        MasterBlade
                                        wrote on last edited by
                                        #25

                                        @J-Hilk said in QTimer doesn't work the expected way:

                                        @MasterBlade QSettings is usually super quick,

                                        how big is the resulting ini file ending up ?
                                        Mb's ?

                                        Only 94 KiB

                                        1 Reply Last reply
                                        0
                                        • M MasterBlade

                                          @jsulm said in QTimer doesn't work the expected way:

                                          @MasterBlade It is really strange if it takes so long.

                                          Well actually I was storing it in OneDrive folder. Will that take longer?

                                          jsulmJ Offline
                                          jsulmJ Offline
                                          jsulm
                                          Lifetime Qt Champion
                                          wrote on last edited by
                                          #26

                                          @MasterBlade said in QTimer doesn't work the expected way:

                                          Well actually I was storing it in OneDrive folder. Will that take longer?

                                          It can. Try to store it locally and see whether this makes a difference...

                                          https://forum.qt.io/topic/113070/qt-code-of-conduct

                                          1 Reply Last reply
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