6 Replies Latest reply on Jun 16, 2014 7:06 PM by Doc_SilverCreek

    Fan Speed Issue

    Bikearni

      I bought a new Intel R2208GZ4GC with 2 E5 2680V2 CPU.

       

      As a result of a high workload, the CPUs are getting very hot with about 75°C, but the fans are still very low with about 2.418 rpm.

       

      My actual bios configuration:

       

      Set Fan Profile: performance

      Fan PWM Offset: 100

      Altitude: 300-900m

      Set Throttling Mode: auto

       

      OS: Ubuntu 14.04 LTS

       

      What should I have to do to tell the fans to increase the speed?

       

      Thanks,

       

      Bikearni

        • 1. Re: Fan Speed Issue
          edwardzh

          Normally you don't have to worry about it - the BMC monitors all temperature sensors and calculate the fan speed. What's your BIOS/FW version, and how did you get the CPU temperature reading?

           

          On this board the CPU thermal sensor will report "Thermal Margin", which should usually be a negative value.

          • 2. Re: Fan Speed Issue
            Bikearni

            Thanks for your response.

             

            The IPMI says:

             

            P1 Therm MarginNormalOK-33 degrees C

             

             

            Ubuntu Sensors says:

             

            coretemp-isa-0000

            Adapter: ISA adapter

            Physical id 0:  +60.0°C  (high = +85.0°C, crit = +95.0°C)

            Core 0:         +58.0°C  (high = +85.0°C, crit = +95.0°C)

            Core 1:         +57.0°C  (high = +85.0°C, crit = +95.0°C)

            Core 2:         +60.0°C  (high = +85.0°C, crit = +95.0°C)

            Core 3:         +54.0°C  (high = +85.0°C, crit = +95.0°C)

            Core 4:         +59.0°C  (high = +85.0°C, crit = +95.0°C)

            Core 8:         +54.0°C  (high = +85.0°C, crit = +95.0°C)

            Core 9:         +56.0°C  (high = +85.0°C, crit = +95.0°C)

            Core 10:        +56.0°C  (high = +85.0°C, crit = +95.0°C)

            Core 11:        +57.0°C  (high = +85.0°C, crit = +95.0°C)

            Core 12:        +56.0°C  (high = +85.0°C, crit = +95.0°C)

             

             

            coretemp-isa-0001

            Adapter: ISA adapter

            Physical id 1:  +41.0°C  (high = +85.0°C, crit = +95.0°C)

            Core 0:         +36.0°C  (high = +85.0°C, crit = +95.0°C)

            Core 1:         +41.0°C  (high = +85.0°C, crit = +95.0°C)

            Core 2:         +41.0°C  (high = +85.0°C, crit = +95.0°C)

            Core 3:         +39.0°C  (high = +85.0°C, crit = +95.0°C)

            Core 4:         +40.0°C  (high = +85.0°C, crit = +95.0°C)

            Core 8:         +39.0°C  (high = +85.0°C, crit = +95.0°C)

            Core 9:         +32.0°C  (high = +85.0°C, crit = +95.0°C)

            Core 10:        +41.0°C  (high = +85.0°C, crit = +95.0°C)

            Core 11:        +37.0°C  (high = +85.0°C, crit = +95.0°C)

            Core 12:        +39.0°C  (high = +85.0°C, crit = +95.0°C)

             

            I think the differences between CPU1 and CPU2 are because of different tasks, running on the System.

             

            Bios Version:

            Build Stamp : SE5C600.86B.02.02.0002.122320131210

            Build Date  : December 23, 2013

             

             

            I noticed, that the Fans increase their speed at Term Margins higher than about -15 degree C. This is about 80 degree C. The Server is placed in a data center, so the volume does not matter. Other Systems have got a CPU Temperature from about 30 degree C and the Fans are working with about 7.000 rpm.

             

            Thanks,

             

            Arndt

            • 3. Re: Fan Speed Issue
              edwardzh

              Current sensor readings look perfectly OK to me. Why would you want the fans to run faster? It will consume more power.

              • 4. Re: Fan Speed Issue
                Bikearni

                Thanks for your reply. I thought the fans should run faster, because of our other servers where the cpu temperature don't increase more than 40 degree C peak.

                • 5. Re: Fan Speed Issue
                  Bikearni

                  Today, we got some Kernel Messages. The Temperature was >85 degree C and the Fans were still running at the slowest Speet of about 2418 rpm.

                  Is there a Bios Update or an other way to increase the fan Speed?

                   

                  Jun 14 13:32:44 easy5 kernel: [1920005.586473] CPU17: Core temperature above threshold, cpu clock throttled (total events = 1)

                  Jun 14 13:32:44 easy5 kernel: [1920005.586475] CPU37: Core temperature above threshold, cpu clock throttled (total events = 1)

                  Jun 14 13:32:44 easy5 kernel: [1920005.586477] CPU13: Package temperature above threshold, cpu clock throttled (total events = 1)

                  Jun 14 13:32:44 easy5 kernel: [1920005.586479] CPU34: Package temperature above threshold, cpu clock throttled (total events = 1)

                  Jun 14 13:32:44 easy5 kernel: [1920005.586480] CPU33: Package temperature above threshold, cpu clock throttled (total events = 1)

                  Jun 14 13:32:44 easy5 kernel: [1920005.586482] CPU14: Package temperature above threshold, cpu clock throttled (total events = 1)

                  Jun 14 13:32:44 easy5 kernel: [1920005.586484] CPU38: Package temperature above threshold, cpu clock throttled (total events = 1)

                  Jun 14 13:32:44 easy5 kernel: [1920005.586486] CPU15: Package temperature above threshold, cpu clock throttled (total events = 1)

                  Jun 14 13:32:44 easy5 kernel: [1920005.586487] CPU35: Package temperature above threshold, cpu clock throttled (total events = 1)

                  Jun 14 13:32:44 easy5 kernel: [1920005.586490] CPU39: Package temperature above threshold, cpu clock throttled (total events = 1)

                  Jun 14 13:32:44 easy5 kernel: [1920005.586492] CPU12: Package temperature above threshold, cpu clock throttled (total events = 1)

                  Jun 14 13:32:44 easy5 kernel: [1920005.586493] CPU32: Package temperature above threshold, cpu clock throttled (total events = 1)

                  • 6. Re: Fan Speed Issue
                    Doc_SilverCreek

                    Couple things.

                     

                    The CPU clock throttle events are normal events. (as long as the total events stay low)

                    The Fan boost should starts with a Therm margin of about ~ -10 and the fans with then ramp to hold the -10 margin temperature.

                    If you have a very high momentary stress application, the CPU may touch the 0 margin point faster than the fan ramps to cool and get logged in the kernel messages.

                    The fans will spike up in this case, the cpu does a very brief throttle and you should see the Total Events be a very small number.

                    There is not any measurable performanceloss when the occurs, (I did a bunch of testing on this before i would believe the Thermal guys on this)

                     

                    If the power bill and noise is not a issue, you can raise the PWM offset set value to about 20% - 40% which starts the fans ramping at a faster speed. (raises the floor speed)

                    The Altitude setting can play a part as well. The higher the alattitude, the thinner the air so the faster the fans need to ramp.

                    Setting the Altitude higher will make the fans ramp faster.

                     

                    I question the Fan PWM Offset: 100 (at 100% the fans should all be running 100% all the time)

                    If this is the setting, you may need to load the FRUSDR for the system to tell it what fans are connected so it can drive them.