Date: Tue, 16 Jun 2020 21:48:19 +0000 From: "Saad, Mark" <Mark.Saad@lucera.com> To: "Foster, Greg" <gfoster@panasas.com>, Navdeep Parhar <np@FreeBSD.org> Cc: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org> Subject: Re: How to Increase TX Queue Priority for LACP Packets Message-ID: <CY4PR12MB1704E7FA436170900F38E23C959D0@CY4PR12MB1704.namprd12.prod.outlook.com> In-Reply-To: <BYAPR08MB6038CF94610AFAD28719BDD3B49D0@BYAPR08MB6038.namprd08.prod.outlook.com> References: <BYAPR08MB6038FF630C3C8EEC4F11862BB4810@BYAPR08MB6038.namprd08.prod.outlook.com> <20200613025031.GA34653@x270>, <BYAPR08MB6038CF94610AFAD28719BDD3B49D0@BYAPR08MB6038.namprd08.prod.outlook.com>
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All Is there any way to make this change on other nic's like Intel ix and Sola= rflare sfxge ? I have seen similar issues on both with 12.1 mainly with solarflare nics. --- Mark Saad mark.saad@lucera.com ________________________________________ From: owner-freebsd-net@freebsd.org <owner-freebsd-net@freebsd.org> on beha= lf of Foster, Greg <gfoster@panasas.com> Sent: Tuesday, June 16, 2020 3:56 PM To: Navdeep Parhar Cc: freebsd-net@freebsd.org Subject: RE: How to Increase TX Queue Priority for LACP Packets HI Navdeep, Thanks for the information! I've integrated the changes and will be testin= g more today. We have seen the LACP port flapping under different scenarios, most we beli= eve are traffic/load based. I did see the flapping unexpectedly when I just enabled LACP debug (e.g., sysctl net.link.lagg.lacp.debug=3D1). Is this a known problem? Thanks Greg -----Original Message----- From: Navdeep Parhar <nparhar@gmail.com> On Behalf Of Navdeep Parhar Sent: Friday, June 12, 2020 7:51 PM To: Foster, Greg <gfoster@panasas.com> Cc: freebsd-net@freebsd.org Subject: Re: How to Increase TX Queue Priority for LACP Packets On Fri, Jun 12, 2020 at 11:47:41PM +0000, Foster, Greg wrote: > FreeBSD Networkers, > > We are seeing LACP port flapping on our FreeBSD 10.4/12.1 systems > under different conditions. > > Can someone explain or point me to the information on how to queue the > LACP packets to a higher priority queue ? > > We are using the Chelsio T580-LP-CR adapter/cxgbe driver. The Cheslio > NICs have 8 TX/RX queues each, but I don't know how to explicitly put > the LACP packets in the higher priority TX queue. > > I've read about PF/ALTQ and think this may be overkill our needs, and > was wondering if there was a simpler method. This is cxgbe specific but that's what you're using so it'll do. Add "hw.cxgbe.rsrv_noflowq=3D1" to your /boot/loader.conf. That reserves o= ne tx queue for non-RSS traffic (like ARP, LACP). You might also want to i= ncrease the number of tx queues to compensate for the one that's now reserv= ed. Use "hw.cxgbe.ntxq=3D9" for that. The ntxq knob might be different on= 10.4 but the man page matching the driver should have its exact name. Regards, Navdeep _______________________________________________ freebsd-net@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org"
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