Hi, Could you reproduce it with latest DPDK iavf?
Thanks, Simei From: Xing, Beilei <[email protected]> Sent: Thursday, April 13, 2023 3:09 PM To: Dhamodaran Pandiyan <[email protected]>; Su, Simei <[email protected]> Cc: David Marchand <[email protected]>; Jeff Guo <[email protected]>; [email protected]; Zhang, Helin <[email protected]> Subject: RE: MAX_MBUF_SIZE causes queue configuration failure. + Simei. From: Dhamodaran Pandiyan <[email protected]<mailto:[email protected]>> Sent: Thursday, April 13, 2023 2:53 PM To: Xing, Beilei <[email protected]<mailto:[email protected]>> Cc: David Marchand <[email protected]<mailto:[email protected]>>; Jeff Guo <[email protected]<mailto:[email protected]>>; [email protected]<mailto:[email protected]>; Zhang, Helin <[email protected]<mailto:[email protected]>> Subject: Re: MAX_MBUF_SIZE causes queue configuration failure. Hi Beilei, We're using, 0000:5e:00.0 'Ethernet Controller X710 for 10GbE SFP+ 1572' drv=vfio-pci unused=i40e 0000:5e:00.1 'Ethernet Controller X710 for 10GbE SFP+ 1572' drv=vfio-pci unused=i40e DPDK_VERSION=20.11 Please let me know if you need any other information. Thanks, Dhamodaran P On Wed, 12 Apr 2023 at 18:24, Xing, Beilei <[email protected]<mailto:[email protected]>> wrote: Hi, Which DPDK version did you use? As i40evf PMD has been deprecated for long time. BR, Beilei > -----Original Message----- > From: David Marchand > <[email protected]<mailto:[email protected]>> > Sent: Wednesday, April 12, 2023 3:28 PM > To: Dhamodaran Pandiyan > <[email protected]<mailto:[email protected]>>; Xing, Beilei > <[email protected]<mailto:[email protected]>>; Jeff Guo > <[email protected]<mailto:[email protected]>> > Cc: [email protected]<mailto:[email protected]> > Subject: Re: MAX_MBUF_SIZE causes queue configuration failure. > > Hello, > > On Wed, Apr 12, 2023 at 8:59 AM Dhamodaran Pandiyan > <[email protected]<mailto:[email protected]>> wrote: > > > > When I set the value to MAX_MBUF_SIZE as less than 16256, all the > initialization went through fine and the application was online. > > > > But when I increase the MAX_MBUF_SIZE to more than 16256 like 16257, > 17000, or 18000, I get the attached log error which shows an issue in > configuring the virtual queues for the NIC. > > > > Log Snip: > > i40evf_configure_vsi_queues(): Failed to execute command of > > VIRTCHNL_OP_CONFIG_VSI_QUEUES > > i40evf_dev_start(): configure queues failed > > Added net/i40e driver maintainers. > > This error indicates a failure either when sending a message to the PF > driver, or > that the PF driver refused to configure this VF with the passed parameters. > Assuming you are using the PF i40e driver, I tracked this message handling to > find that buffer size is limited (the exact limit is not clear to me) > probably due > to some hw limitations. > > See: > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/ > net/ethernet/intel/i40e/i40e_virtchnl_pf.c#n4088 > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/ > net/ethernet/intel/i40e/i40e_virtchnl_pf.c#n2371 > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/ > net/ethernet/intel/i40e/i40e_virtchnl_pf.c#n714 > > /* max pkt. length validation */ > if (info->max_pkt_size >= (16 * 1024) || info->max_pkt_size < 64) { > ret = -EINVAL; > goto error_param; > } > > I'll let net/i40e reply with better details/explanations. > > > > MTU size for port id: is: 9000 > > Failed to start the fast pkt for port_id : 1Ret: -1 > > > > Some Observations: > > 1. Thought memory availability was an issue, so provided 10x more memory > and allocated 10x huge pages than required, still noticed the same issue. > > 2. Got to know MTU size also plays a role in deciding the mbuf_size, so > > tried > running app with MTU of less value, but still issue persists. > > > > Please someone enlighten me on what is happening here. > > > > -- > David Marchand
