• Prarit Bhargava's avatar
    tools, testing, add test for intel_pstate driver · ed2d26d7
    Prarit Bhargava authored
    This test used the cpupower utility to set the cpu frequency from the
    maximum turbo value to the minimum supported value in steps of 100 MHz.
    
    The results are displayed in a table which indicate the "Target" state,
    or the requested frequency in MHz, the Actual frequency, as read from
    /proc/cpuinfo, the difference between the Target and Actual frequencies,
    and the value of MSR 0x199 (MSR_IA32_PERF_CTL) which indicates what
    pstate the cpu is in, and the value of
    /sys/devices/system/cpu/intel_pstate/max_perf_pct X maximum turbo state
    
    Cc: Shuah Khan <shuahkh@osg.samsung.com>
    Cc: linux-api@vger.kernel.org
    Signed-off-by: default avatarPrarit Bhargava <prarit@redhat.com>
    Signed-off-by: default avatarShuah Khan <shuahkh@osg.samsung.com>
    ed2d26d7
msr.c 643 Bytes