264. Power managerment throughput test plan

This test plan test cpu frequence changed according io workloads with l3fwd-power sample. The cpu frequency status depends on NIC and CPU type.

264.1. Prerequisites

  1. Update Grub:

    Add "intel_pstate=disable" in kernel options.
    
  2. BIOS configuration as below:

    CPU mode : "Power"
    Workload configuratuion:"IO sensitive"
    Hardware Power : "Disabled"
    Speedstep : "Enabled"
    Turbo : "Enabled"
    C-stats:C0/C1
    C6 : "Enabled"
    

264.2. Test Case1: Check the CPU frequency can change according differernt packet speed

  1. Check that you are using the “acpi-cpufreq” driver by command “cpufreq-info”.

  2. CPU frequency controlled by userspace by command “cpupower frequency-set -g userspace”.

  3. Bind one nic port to igb_uio, launch l3fwd-power sample, one core used for one port:

    ./l3fwd-power -c 0xc000000 -n 4 -- -P -p 0x01  --config '(0,0,27)'
    
  4. Send packets by packet generator with high speed, check the used cpu frequency is almost 100%:

    cat /sys/devices/system/cpu/cpu27/cpufreq/cpuinfo_cur_freq
    
  5. Send packets by packet generator with low speed, the CPU frequency will reduce about 50%:

    cat /sys/devices/system/cpu/cpu27/cpufreq/cpuinfo_cur_freq