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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

    undo my experiement with overclocking....

    Scheduled Pinned Locked Moved Help and Support
    overclock b+overclockoverclocking
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    • mituM
      mitu Global Moderator @Amishgamer
      last edited by

      @Amishgamer said in undo my experiement with overclocking....:

      How do I undo the
      echo "performance" |sudo tee /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
      command?

      That only has effect until the next reboot, so you could reboot your PI.

      quicksilverQ 1 Reply Last reply Reply Quote 0
      • quicksilverQ
        quicksilver @mitu
        last edited by

        @mitu so the CPU governor is reset to default each time the pi is rebooted?

        mituM 1 Reply Last reply Reply Quote 0
        • mituM
          mitu Global Moderator @quicksilver
          last edited by

          @quicksilver If you change it with the method posted above, yes, the sysfs modifications via echo are not persistent.

          1 Reply Last reply Reply Quote 1
          • A
            Amishgamer
            last edited by

            I'm not doubint you. But, I am wondering then why is my sysbench readings still coming in >90 seconds when they should be in the 70's.

            Any suggestions? I hate to restart building my retropie. It's finally almost the way I like it :D

            mituM 1 Reply Last reply Reply Quote 0
            • mituM
              mitu Global Moderator @Amishgamer
              last edited by

              @Amishgamer Who knows ? Do you think it matters ?

              1 Reply Last reply Reply Quote 0
              • A
                Amishgamer
                last edited by

                Well, earlier today just browsing the Emulationstation got a little choppy...

                edmaul69E 1 Reply Last reply Reply Quote 0
                • edmaul69E
                  edmaul69 @Amishgamer
                  last edited by edmaul69

                  @Amishgamer emulationstation gets choppy if you have a bunch of systems on the pi. Turning off the help menu fixes it. Not sure if you do or not.

                  1 Reply Last reply Reply Quote 0
                  • EfriimE
                    Efriim @Amishgamer
                    last edited by

                    @Amishgamer
                    How do you invoke sysbench?

                    1 Reply Last reply Reply Quote 0
                    • A
                      Amishgamer
                      last edited by

                      sysbench --test=cpu --cpu-max-prime=20000 --num-threads=4 run

                      EfriimE 2 Replies Last reply Reply Quote 0
                      • EfriimE
                        Efriim @Amishgamer
                        last edited by Efriim

                        @Amishgamer
                        If i'm reading it right, pi3b+
                        my overclocked total time is 72 and 75 seconds.
                        and default gives me 81 seconds.

                        I don't know what could be adding to get >90s

                        1 Reply Last reply Reply Quote 0
                        • EfriimE
                          Efriim @Amishgamer
                          last edited by Efriim

                          @Amishgamer
                          It is likely that your pi was throttling to 1200mhz
                          setting mine to 1200mhz returned 95s sysbench.
                          while it used to do this at 70c it has been changed to 60c degrees
                          if you have a fan or heatsink make sure they are properly fixed.
                          if you only have a heatsink and no fan then this temperature is normal, and the throttling level can be increased by setting
                          temp_soft_limit=70
                          to config.txt

                          here are some commands to read from vcgencmd the current voltage and frequencies
                          for src in arm core h264 isp v3d; do echo -e "$src:\t$(vcgencmd measure_clock $src)"; done

                          for id in core sdram_p sdram_i sdram_c ; do echo -e "$id:\t$(vcgencmd measure_volts $id)"; done
                          and read the systems boot time, userspace time completion can vary by up to 5 - 90 seconds depending on the last shutdown and if the system thinks it needs a filesystem check or on usb drives.
                          systemd-analyze

                          I added them to a script to be able to execute all together

                          #!/bin/bash
                          for id in core sdram_p sdram_i sdram_c ; do echo -e "$id:\t$(vcgencmd measure_volts $id)"; done
                          for src in arm core h264 isp v3d; do echo -e "$src:\t$(vcgencmd measure_clock $src)"; done
                          cpuTemp0=$(cat /sys/class/thermal/thermal_zone0/temp)
                          cpuTemp1=$(($cpuTemp0/1000))
                          cpuTemp2=$(($cpuTemp0/100))
                          cpuTempM=$(($cpuTemp2 % $cpuTemp1))
                          echo CPU temp"="$cpuTemp1"."$cpuTempM"'C"
                          echo GPU $(/opt/vc/bin/vcgencmd measure_temp)
                          systemd-analyze
                          
                          1 Reply Last reply Reply Quote 0
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