On Thu, May 31, 2018 at 03:51:43PM -0700, Srinivas Pandruvada wrote:
> Enable HWP boost on Skylake server platform.
>
> Signed-off-by: Srinivas Pandruvada <srinivas.pandruv...@linux.intel.com>
> ---
> drivers/cpufreq/intel_pstate.c | 9 +++++++++
> 1 file changed, 9 insertions(+)
>
> diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
> index 254e30a6c1e0..75c5a95bc0ac 100644
> --- a/drivers/cpufreq/intel_pstate.c
> +++ b/drivers/cpufreq/intel_pstate.c
> @@ -1794,6 +1794,11 @@ static const struct x86_cpu_id
> intel_pstate_cpu_ee_disable_ids[] = {
> {}
> };
>
> +static const struct x86_cpu_id intel_pstate_hwp_boost_ids[] __initconst = {
> + ICPU(INTEL_FAM6_SKYLAKE_X, core_funcs),
> + {}
> +};
> +
> static int intel_pstate_init_cpu(unsigned int cpunum)
> {
> struct cpudata *cpu;
> @@ -1824,6 +1829,10 @@ static int intel_pstate_init_cpu(unsigned int cpunum)
> intel_pstate_disable_ee(cpunum);
>
> intel_pstate_hwp_enable(cpu);
> +
> + id = x86_match_cpu(intel_pstate_hwp_boost_ids);
> + if (id)
> + hwp_boost = true;
> }
>
> intel_pstate_get_cpu_pstates(cpu);
> --
> 2.13.6
>
>
I have a Skylake server, HWP capable, but it doesn't trigger this bit; I had
to do "echo 1 > /sys/devices/system/cpu/intel_pstate/hwp_dynamic_boost".
Just out of curiosity, do you see reasons for leaving some SKL out of the
default setting? Or maybe I'm missing something.
/proc/cpuinfo says that the model name is "Intel(R) Xeon(R) CPU E3-1240 v5";
the outputs of `cpuid -1` and `cpuid -1 --raw` are in this pastebin:
http://paste.opensuse.org/view/raw/34255499
Giovanni Gherdovich
SUSE Labs
