Re: [dpdk-dev] [PATCH v2] examples/power: add baseline mode to PMD power

["Burakov, Anatoly" <anatoly.burakov@intel.com>]

On 22-Jun-21 3:07 PM, David Hunt wrote:
> The PMD Power Management scheme currently has 3 modes,
> scale, monitor and pause. However, it would be nice to
> have a baseline mode for easy comparison of power savings
> with and without these modes.
> 
> This patch adds a 'baseline' mode were the pmd power
> management is not enabled. Use --pmg-mgmt=baseline.
> 
> Signed-off-by: David Hunt <david.hunt@intel.com>
> 
> ---
> changes in v2
> * added a bool for baseline mode rather than abusing enums
> ---
>   examples/l3fwd-power/main.c | 14 ++++++++++++--
>   1 file changed, 12 insertions(+), 2 deletions(-)
> 
> diff --git a/examples/l3fwd-power/main.c b/examples/l3fwd-power/main.c
> index f8dfed1634..aeb2411e62 100644
> --- a/examples/l3fwd-power/main.c
> +++ b/examples/l3fwd-power/main.c
> @@ -207,6 +207,7 @@ enum appmode {
>   enum appmode app_mode;
>   
>   static enum rte_power_pmd_mgmt_type pmgmt_type;
> +bool baseline_enabled;
>   
>   enum freq_scale_hint_t
>   {
> @@ -1617,7 +1618,7 @@ print_usage(const char *prgname)
>   		" empty polls, full polls, and core busyness to telemetry\n"
>   		" --interrupt-only: enable interrupt-only mode\n"
>   		" --pmd-mgmt MODE: enable PMD power management mode. "
> -		"Currently supported modes: monitor, pause, scale\n",
> +		"Currently supported modes: baseline, monitor, pause, scale\n",
>   		prgname);
>   }
>   
> @@ -1714,6 +1715,7 @@ parse_pmd_mgmt_config(const char *name)
>   #define PMD_MGMT_MONITOR "monitor"
>   #define PMD_MGMT_PAUSE   "pause"
>   #define PMD_MGMT_SCALE   "scale"
> +#define PMD_MGMT_BASELINE  "baseline"
>   
>   	if (strncmp(PMD_MGMT_MONITOR, name, sizeof(PMD_MGMT_MONITOR)) == 0) {
>   		pmgmt_type = RTE_POWER_MGMT_TYPE_MONITOR;
> @@ -1729,6 +1731,10 @@ parse_pmd_mgmt_config(const char *name)
>   		pmgmt_type = RTE_POWER_MGMT_TYPE_SCALE;
>   		return 0;
>   	}
> +	if (strncmp(PMD_MGMT_BASELINE, name, sizeof(PMD_MGMT_BASELINE)) == 0) {
> +		baseline_enabled = true;
> +		return 0;
> +	}
>   	/* unknown PMD power management mode */
>   	return -1;
>   }
> @@ -2528,6 +2534,9 @@ main(int argc, char **argv)
>   	/* init RTE timer library to be used late */
>   	rte_timer_subsystem_init();
>   
> +	/* if we're running pmd-mgmt mode, don't default to baseline mode */
> +	baseline_enabled = false;
> +
>   	/* parse application arguments (after the EAL ones) */
>   	ret = parse_args(argc, argv);
>   	if (ret < 0)
> @@ -2767,7 +2776,8 @@ main(int argc, char **argv)
>   						 "Fail to add ptype cb\n");
>   			}
>   
> -			if (app_mode == APP_MODE_PMD_MGMT) {
> +			if ((app_mode == APP_MODE_PMD_MGMT) &&
> +					(baseline_enabled == false)) {

Nitpicking, !baseline_enabled

Otherwise,

Acked-by: Anatoly Burakov <anatoly.burakov@intel.com>

>   				ret = rte_power_ethdev_pmgmt_queue_enable(
>   						lcore_id, portid, queueid,
>   						pmgmt_type);
> 


-- 
Thanks,
Anatoly