[dpdk-dev] [PATCH] lib/librte_power: set new frequecy on turbo_disable

[Hunt, David]

On 12/4/2019 4:57 PM, Lee Daly wrote:
> This patch will ensure the correct max frequency of a core is set in
> the lcore_power_info struct when disabling turbo, while using the
> intel pstate driver.
>
> Fixes: e6c6dc0f96c8 ("power: add p-state driver compatibility")
> Cc: liang.j.ma at intel.com
> Cc: stable at dpdk.org
>
> Signed-off-by: Lee Daly <lee.daly at intel.com>
> ---
>   lib/librte_power/power_pstate_cpufreq.c | 10 +++++++++-
>   1 file changed, 9 insertions(+), 1 deletion(-)
>
> diff --git a/lib/librte_power/power_pstate_cpufreq.c b/lib/librte_power/power_pstate_cpufreq.c
> index 336c13869..d2ac75123 100644
> --- a/lib/librte_power/power_pstate_cpufreq.c
> +++ b/lib/librte_power/power_pstate_cpufreq.c
> @@ -810,7 +810,15 @@ power_pstate_disable_turbo(unsigned int lcore_id)
>   
>   	pi->turbo_enable = 0;
>   
> -
> +	if ((pi->turbo_available) && (pi->curr_idx <= 1)) {
> +		/* Try to set freq to max by default coming out of turbo */
> +		if (power_pstate_cpufreq_freq_max(lcore_id) < 0) {
> +			RTE_LOG(ERR, POWER,
> +				"Failed to set frequency of lcore %u to max\n",
> +				lcore_id);
> +			return -1;
> +		}
> +	}
>   	return 0;
>   }
>   


Acked-by: David Hunt <david.hunt at intel.com>