[PATCH v2] eal: support lcore usage ratio

[Morten Brørup]

> From: Chengwen Feng [mailto:fengchengwen at huawei.com]
> Sent: Monday, 23 October 2023 14.29
> 
> Current, the lcore usage only display two key fields: busy_cycles and
> total_cycles, which is inconvenient to obtain the usage ratio
> immediately. So adds lcore usage ratio field.

[...]

> @@ -462,8 +469,9 @@ lcore_dump_cb(unsigned int lcore_id, void *arg)
>  	/* Guard against concurrent modification of lcore_usage_cb. */
>  	usage_cb = lcore_usage_cb;
>  	if (usage_cb != NULL && usage_cb(lcore_id, &usage) == 0) {
> -		if (asprintf(&usage_str, ", busy cycles %"PRIu64"/%"PRIu64,
> -				usage.busy_cycles, usage.total_cycles) < 0) {
> +		if (asprintf(&usage_str, ", busy cycles %"PRIu64"/%"PRIu64"
> (ratio %.2f%%)",

The zero is missing in %.02f%%.

> +				usage.busy_cycles, usage.total_cycles,
> +				calc_usage_ratio(&usage)) < 0) {
>  			return -ENOMEM;
>  		}
>  	}
> @@ -511,11 +519,19 @@ struct lcore_telemetry_info {
>  	struct rte_tel_data *d;
>  };
> 
> +static void
> +format_usage_ratio(char *buf, uint16_t size, const struct
> rte_lcore_usage *usage)
> +{
> +	float ratio = calc_usage_ratio(usage);
> +	snprintf(buf, size, "%.2f%%", ratio);

Also zero missing in "%.02f%%" here.

With the two missing zeroes added,

Acked-by: Morten Brørup <mb at smartsharesystems.com>