[RFC v2 06/14] eal: warn if thread name is truncated

[Bruce Richardson]

On Thu, Dec 04, 2025 at 06:28:15PM -0800, Stephen Hemminger wrote:
> Thread name is very short 16 characters and therefore the name
> dpdk-worker-%d will overflow with more than 9999 worker cores.
> Error should be non-fatal since name only matters for debug.
> 
> Signed-off-by: Stephen Hemminger <stephen at networkplumber.org>
> ---

Can't see this issue being hit any time soon, but no harm.

Acked-by: Bruce Richardson <bruce.richardson at intel.com>

>  lib/eal/linux/eal.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/lib/eal/linux/eal.c b/lib/eal/linux/eal.c
> index b12f325ddd..d848de03d8 100644
> --- a/lib/eal/linux/eal.c
> +++ b/lib/eal/linux/eal.c
> @@ -863,8 +863,10 @@ rte_eal_init(int argc, char **argv)
>  			rte_panic("Cannot create thread\n");
>  
>  		/* Set thread_name for aid in debugging. */
> -		snprintf(thread_name, sizeof(thread_name),
> -			"dpdk-worker%d", i);
> +		ret = snprintf(thread_name, sizeof(thread_name), "dpdk-worker%d", i);
> +		if (ret >= RTE_THREAD_NAME_SIZE)
> +			EAL_LOG(INFO, "Worker thread name %s truncated", thread_name);
> +
>  		rte_thread_set_name(lcore_config[i].thread_id, thread_name);
>  
>  		ret = rte_thread_set_affinity_by_id(lcore_config[i].thread_id,
> -- 
> 2.51.0
>