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>
next in thread | previous in thread | raw e-mail | index | archive | help
All Is there any way to make this change on other nic's like Intel ix and Solarflare 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 behalf 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 testing more today. We have seen the LACP port flapping under different scenarios, most we believe are traffic/load based. I did see the flapping unexpectedly when I just enabled LACP debug (e.g., sysctl net.link.lagg.lacp.debug=1). 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=1" to your /boot/loader.conf. That reserves one tx queue for non-RSS traffic (like ARP, LACP). You might also want to increase the number of tx queues to compensate for the one that's now reserved. Use "hw.cxgbe.ntxq=9" 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"
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?CY4PR12MB1704E7FA436170900F38E23C959D0>