* DPDK port concept in rte_eth_dev
@ 2022-08-17 11:28 Mikael R Carlsson
2022-08-17 15:30 ` Stephen Hemminger
0 siblings, 1 reply; 2+ messages in thread
From: Mikael R Carlsson @ 2022-08-17 11:28 UTC (permalink / raw)
To: users
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Hi!
Sorry for asking such a basic question but I have a hard time understanding the "port" concept in rte_eth_dev.
I am using 2 VFs on the same physical port on a NIC, VF7 and VF6. These to VFs have there own unique PCI address. When I call rte_eth_dev_get_port_by_name, I suspect that I get the same port id from both PCI addresses (not sure here, still looking into this)
Could someone please give me a short explanation of the "port" concept in rte_eth_dev, and how that correlates to PCI address and also eth_dev_rx_burst assuming you want to poll only from VF7 for example.
Thanks in advance!
/ Mikael
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* Re: DPDK port concept in rte_eth_dev
2022-08-17 11:28 DPDK port concept in rte_eth_dev Mikael R Carlsson
@ 2022-08-17 15:30 ` Stephen Hemminger
0 siblings, 0 replies; 2+ messages in thread
From: Stephen Hemminger @ 2022-08-17 15:30 UTC (permalink / raw)
To: Mikael R Carlsson; +Cc: users
On Wed, 17 Aug 2022 11:28:20 +0000
Mikael R Carlsson <Mikael.R.Carlsson@tietoevry.com> wrote:
> Hi!
>
> Sorry for asking such a basic question but I have a hard time understanding the "port" concept in rte_eth_dev.
>
> I am using 2 VFs on the same physical port on a NIC, VF7 and VF6. These to VFs have there own unique PCI address. When I call rte_eth_dev_get_port_by_name, I suspect that I get the same port id from both PCI addresses (not sure here, still looking into this)
>
> Could someone please give me a short explanation of the "port" concept in rte_eth_dev, and how that correlates to PCI address and also eth_dev_rx_burst assuming you want to poll only from VF7 for example.
>
> Thanks in advance!
>
> / Mikael
>
DPDK ethdev port is more of an object index (like Linux file handle).
It can refer to many different types of devices.
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