Hi all,
I am trying to make an application for having various rx threads capturing
packets from various queues of the same NIC (to increase performance using
RSS on one NIC). I am basing the app on an example called l3fwd-thread.
However, when I try to create the rx queue in a port using the
rte_eth_rx_queue_setup function it returns an -28 error (ENOSPC).
Having a look at source code of rte_ethdev.c, where this function is
implemented, I have seen the only place where ENOSCP value is returned (see
below).
if (mp->private_data_size < sizeof(struct rte_pktmbuf_pool_private)) {
RTE_PMD_DEBUG_TRACE("%s private_data_size %d < %d\n",
mp->name, (int) mp->private_data_size,
(int) sizeof(struct rte_pktmbuf_pool_private));
return -ENOSPC;
}
Executing step by step (using Eclipse), I saw that the private_data_size of
the pktmbuf_pool was set to zero. And that was the reason why it returned
-ENOSPC.
Nevertheless in the init_mem function of the example, when the pktmbuf_pool
is created, the value for private_data_size as parameter is 0.
if (pktmbuf_pool[socketid] == NULL) {
snprintf(s, sizeof(s), "mbuf_pool_%d", socketid);
pktmbuf_pool[socketid] =
rte_pktmbuf_pool_create(s, nb_mbuf,
MEMPOOL_CACHE_SIZE, 0,
RTE_MBUF_DEFAULT_BUF_SIZE, socketid);
if (pktmbuf_pool[socketid] == NULL)
rte_exit(EXIT_FAILURE,
"Cannot init mbuf pool on socket %d\n", socketid);
else
printf("Allocated mbuf pool on socket %d\n", socketid);
#if (APP_LOOKUP_METHOD == APP_LOOKUP_LPM)
setup_lpm(socketid);
#else
setup_hash(socketid);
#endif
}
So this is contradictory. Why the example initializes the private_data_size
to 0 and then it provokes a bat rx queue initialization?
Or am I understanding it wrongly?
Thanks for your attention,
--
Victor
--
Victor
