Re: [dpdk-dev] [PATCH] eal: store control thread CPU affinity in TLS

[David Marchand <david.marchand@redhat.com>]

On Wed, Feb 5, 2020 at 11:24 AM <jerinj@marvell.com> wrote:
>
> From: Jerin Jacob <jerinj@marvell.com>
>
> _cpuset TLS variable stores the CPU affinity of eal thread.
> Populate the _cpuset TLS variable for control thread to
>
> 1) Make rte_thread_get_affinity() and eal_thread_dump_affinity
> functional with control thread.
> 2) Quick access to cpu affinity.
>
> Signed-off-by: Jerin Jacob <jerinj@marvell.com>
> ---
>  lib/librte_eal/common/eal_common_thread.c | 4 ++++
>  1 file changed, 4 insertions(+)
>
> diff --git a/lib/librte_eal/common/eal_common_thread.c b/lib/librte_eal/common/eal_common_thread.c
> index 78581753c..99fe1aa4e 100644
> --- a/lib/librte_eal/common/eal_common_thread.c
> +++ b/lib/librte_eal/common/eal_common_thread.c
> @@ -152,10 +152,14 @@ struct rte_thread_ctrl_params {
>  static void *rte_thread_init(void *arg)
>  {
>         int ret;
> +       rte_cpuset_t *cpuset = &internal_config.ctrl_cpuset;
>         struct rte_thread_ctrl_params *params = arg;
>         void *(*start_routine)(void *) = params->start_routine;
>         void *routine_arg = params->arg;
>
> +       /* Store cpuset in TLS for quick access */
> +       memmove(&RTE_PER_LCORE(_cpuset), cpuset, sizeof(rte_cpuset_t));
> +
>         ret = pthread_barrier_wait(&params->configured);
>         if (ret == PTHREAD_BARRIER_SERIAL_THREAD) {
>                 pthread_barrier_destroy(&params->configured);

Reviewed-by: David Marchand <david.marchand@redhat.com>


-- 
David Marchand