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How is Load Average calculated ?

Slawski

My XG load average is a number between 1.0 and 2.0 mostly sitting at 1.3. This is strange for me because CPU idles at 2-3% most of the time. Normal Linux system with such cpu usage will have load average of less than 0.1.


As XG has a Linux kernel (modified or not - i don't know) - it should calculate load avarage similiary, or not ?

Does anybody know something about that Load Average meaning ?



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    Hi Slawek,

    Online definition for Load average is the average system load calculated over a given period of time of 1, 5 and 15 minutes. The maths is same for the XG firewall, based on the fact that it runs on a Linux kernel. If you have dual-cores CPU running the XG firewall, then the load average is normal.

    To check the numbers of cores, you can execute the following command in the Device Console:

    console> system diagnostics show cpu

    Thanks,

  • 0 in reply to sachingurung

    sachingurung said:

    Which XG model are is it? This highly depends on the number of cores. If you have 2 or 3 cores the load average is normal. 

    Well, My "XG" is a Software Applicance. It runs on custom build PC. The processor is Intel Celeron J1900 and has 4 cores (4 logical CPUs - no hyperthreading there).


    The same hardware with a normal Linux or pfSense displays values in 0.1 - 0.5 range if CPU is not more that 10% on average.

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  • 0 in reply to sachingurung

    sachingurung said:

    Which XG model are is it? This highly depends on the number of cores. If you have 2 or 3 cores the load average is normal. 

    Well, My "XG" is a Software Applicance. It runs on custom build PC. The processor is Intel Celeron J1900 and has 4 cores (4 logical CPUs - no hyperthreading there).


    The same hardware with a normal Linux or pfSense displays values in 0.1 - 0.5 range if CPU is not more that 10% on average.

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