2016-09-01 01:31, Jianfeng Tan: > This patch uses pthread_getaffinity_np() to narrow down detected > cores before parsing coremask (-c), corelist (-l), and coremap > (--lcores). > > The purpose of this patch is to leave out these core related options > when DPDK applications are deployed under container env, so that > users only specify core restriction as starting the instance. [...] > --- a/lib/librte_eal/common/eal_common_lcore.c > +++ b/lib/librte_eal/common/eal_common_lcore.c > @@ -57,6 +57,12 @@ rte_eal_cpu_init(void) > struct rte_config *config = rte_eal_get_configuration(); > unsigned lcore_id; > unsigned count = 0; > + rte_cpuset_t affinity_set; > + pthread_t tid = pthread_self(); > +
A comment is needed here to explain which errors we are checking. > + if (pthread_getaffinity_np(tid, sizeof(rte_cpuset_t), > + &affinity_set) < 0) > + CPU_ZERO(&affinity_set); > > /* > * Parse the maximum set of logical cores, detect the subset of running > @@ -70,7 +76,8 @@ rte_eal_cpu_init(void) > > /* in 1:1 mapping, record related cpu detected state */ > lcore_config[lcore_id].detected = eal_cpu_detected(lcore_id); > - if (lcore_config[lcore_id].detected == 0) { > + if (lcore_config[lcore_id].detected == 0 || > + !CPU_ISSET(lcore_id, &affinity_set)) { > config->lcore_role[lcore_id] = ROLE_OFF; > lcore_config[lcore_id].core_index = -1; > continue; >