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From: Bruce Richardson <bruce.richardson@intel.com>
To: Moon-Sang Lee <sang0627@gmail.com>
Cc: dev@dpdk.org
Subject: Re: [dpdk-dev] [Q] l2fwd in examples directory
Date: Fri, 16 Oct 2015 14:43:21 +0100	[thread overview]
Message-ID: <20151016134320.GE9980@bricha3-MOBL3> (raw)
In-Reply-To: <CAACK=XcmnkOufRfqxM3No8aPBpFWrtaiDq4JcyVh=Dzh+YZKYg@mail.gmail.com>

On Thu, Oct 15, 2015 at 11:08:57AM +0900, Moon-Sang Lee wrote:
> There is codes as below in examples/l2fwd/main.c and I think
> rte_eth_dev_socket_id(portid)
> always returns -1(SOCKET_ID_ANY) since there is no association code between
> port and
> lcore in the example codes.

Can you perhaps clarify what you mean here. On modern NUMA systems, such as those
from Intel :-), the PCI slots are directly connected to the CPU sockets, so the
ethernet ports do indeed have a direct NUMA affinity. It's not something that
the app needs to specify.

/Bruce

> (i.e. I need to find a matching lcore from
> lcore_queue_conf[] with portid
> and call rte_lcore_to_socket_id(lcore_id).)
> 
>         /* init one RX queue */
>         fflush(stdout);
>         ret = rte_eth_rx_queue_setup(portid, 0, nb_rxd,
>                          rte_eth_dev_socket_id(portid),
>                          NULL,
>                          l2fwd_pktmbuf_pool);
>         if (ret < 0)
>             rte_exit(EXIT_FAILURE, "rte_eth_rx_queue_setup:err=%d,
> port=%u\n",
>                   ret, (unsigned) portid);
> 
> It works fine even though memory is allocated in different NUMA node. But I
> wonder there is
> a DPDK API that associates inlcore to port internally thus
> rte_eth_devices[portid].pci_dev->numa_node
> contains proper node.
> 
> 
> -- 
> Moon-Sang Lee, SW Engineer
> Email: sang0627@gmail.com
> Wisdom begins in wonder. *Socrates*

  reply	other threads:[~2015-10-16 13:43 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-10-15  2:08 Moon-Sang Lee
2015-10-15  2:08 ` Moon-Sang Lee
2015-10-16 13:43   ` Bruce Richardson [this message]
2015-10-18  5:51     ` Moon-Sang Lee
2015-10-19  7:39       ` Moon-Sang Lee
2015-10-19  7:51         ` Moon-Sang Lee
2015-10-19  9:34         ` Bruce Richardson

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