Issue with rte_eth_dev_start

[Verghis Koshi]

Hi Igor,
    Just curious, what's your setup?  Server or laptop?

Verghis

On Fri, Apr 21, 2023 at 5:37 AM Igor de Paula <igordptx at gmail.com> wrote:

> From what I can tell, dpdk calles the function  vfio_disable_msix  in the
> stop and start function. The reason it does not happen in start up is that
> I don't call stop before.
> Calling stop and then start calls the function twice. Which maybe
> shouldn't happen... Is it a bug?
>
> On Thu, Apr 20, 2023 at 12:33 PM Igor de Paula <igordptx at gmail.com> wrote:
>
>> Hi,
>> I am having trouble with restarting a HW port allocated to DPDK.
>> I am running the DPDK version: 21.08.0 and Ubuntu 20.04.3 LTS.
>> The driver is : net_e100igb
>> After I start the port with no issues I try to call rte_eth_dev_stop to
>> stop it.
>> When I am ready I call rte_eth_dev_start to start it again an I get the
>> following message:
>> EAL: Error disabling MSI-X interrupts for fd 46.
>> I am not sure what this error is coming from and what it causes.
>> I found little information online. If someone could explain, I would
>> really appreciate it.
>> This is a copy print on setup with no issues:
>> 2023-04-20 11:09:51.703542:     Driver: net_e1000_igb
>> 2023-04-20 11:09:51.703546:     Bus Id: 0000:01:00.0
>> 2023-04-20 11:09:51.703551:     rx offload cap: 280e (92e0f)
>> 2023-04-20 11:09:51.703555:     tx offload cap: 8002 (803f)
>> 2023-04-20 11:09:51.703559:     NUMA Socket: 0
>> 2023-04-20 11:09:51.703563:     MAC Address: b4:96:91:63:62:40
>> 2023-04-20 11:09:51.703568:     Max Rx Queue: 8
>> 2023-04-20 11:09:51.703572:     Max Tx Queue: 8
>> 2023-04-20 11:09:51.703577:     Max Rx Descriptors: 4096
>> 2023-04-20 11:09:51.703581:     Max Tx Descriptors: 4096
>> 2023-04-20 11:09:51.703585:     Max Rx Packet Length: 16383
>> 2023-04-20 11:09:51.703589:     Available Link Speeds: 10Mb/s 100Mb/s
>> 1Gb/s
>> 2023-04-20 11:09:51.703608:     Fixed Link Speed: Auto
>> 2023-04-20 11:09:51.703616:     Fixed Duplex: Auto
>> 2023-04-20 11:09:51.703623:     MTU Set to: 16383
>> 2023-04-20 11:09:51.703632:     Actual Rx Descriptors: 4096
>> 2023-04-20 11:09:51.703636:     Actual Tx Descriptors: 4096
>> 2023-04-20 11:09:51.703695:     Set up 1 send queues
>> 2023-04-20 11:09:51.703700:     Actual MTU: 16383
>> 2023-04-20 11:09:51.703704:     Actual Linkspeed: 0
>> 2023-04-20 11:09:51.703708:     Actual duplex: 0
>> 2023-04-20 11:09:51.703713:     Successfully set port interrupt event
>> 2023-04-20 11:09:51.818085:     Flow control turned off for Port 0
>> 2023-04-20 11:09:51.844179:     Port 0 up and running
>> 2023-04-20 11:09:51.844303: Event type: LSC interrupt
>> 2023-04-20 11:09:51.844382:     Port 0 Link Down
>>
>> And after I stop and start:
>> 2023-04-20 11:11:00.492428:     Driver: net_e1000_igb
>> 2023-04-20 11:11:00.492476:     Bus Id: 0000:01:00.0
>> 2023-04-20 11:11:00.492526:     rx offload cap: 280e (92e0f)
>> 2023-04-20 11:11:00.492576:     tx offload cap: 8002 (803f)
>> 2023-04-20 11:11:00.492624:     NUMA Socket: 0
>> 2023-04-20 11:11:00.492672:     MAC Address: b4:96:91:63:62:40
>> 2023-04-20 11:11:00.492721:     Max Rx Queue: 8
>> 2023-04-20 11:11:00.492770:     Max Tx Queue: 8
>> 2023-04-20 11:11:00.492813:     Max Rx Descriptors: 4096
>> 2023-04-20 11:11:00.492851:     Max Tx Descriptors: 4096
>> 2023-04-20 11:11:00.492889:     Max Rx Packet Length: 16383
>> 2023-04-20 11:11:00.492958:     Available Link Speeds: 10Mb/s 100Mb/s
>> 1Gb/s
>> 2023-04-20 11:11:00.493207:     Fixed Link Speed: Auto
>> 2023-04-20 11:11:00.493301:     Fixed Duplex: Full
>> 2023-04-20 11:11:00.493822:     MTU Set to: 16383
>> 2023-04-20 11:11:00.493889:     Actual Rx Descriptors: 4096
>> 2023-04-20 11:11:00.493936:     Actual Tx Descriptors: 4096
>> 2023-04-20 11:11:00.494190:     Actual MTU: 16383
>> 2023-04-20 11:11:00.494229:     Actual Linkspeed: 0
>> 2023-04-20 11:11:00.494266:     Actual duplex: 1
>> 2023-04-20 11:11:00.494305:     Successfully set port interrupt event
>> *EAL: Error disabling MSI-X interrupts for fd 46*
>> 2023-04-20 11:11:00.603181:     Flow control turned off for Port 0
>> 2023-04-20 11:11:00.629151:     Port 0 up and running
>> 2023-04-20 11:11:00.629222: Event type: LSC interrupt
>> 2023-04-20 11:11:00.629273:     Port 0 Link Down
>>
>>
>> Thanks,
>> Igor
>>
>>
>>
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