Date: Wed, 17 Jun 2020 00:31:33 +0000 From: "Saad, Mark" <Mark.Saad@lucera.com> To: Navdeep Parhar <np@freebsd.org> Cc: "Foster, Greg" <gfoster@panasas.com>, "freebsd-net@freebsd.org" <freebsd-net@freebsd.org> Subject: Re: How to Increase TX Queue Priority for LACP Packets Message-ID: <CFA7E255-0D0B-469E-8A0F-28F96861979D@lucera.com> In-Reply-To: <20200617001315.GB80914@x270> References: <BYAPR08MB6038FF630C3C8EEC4F11862BB4810@BYAPR08MB6038.namprd08.prod.outlook.com> <20200613025031.GA34653@x270> <BYAPR08MB6038CF94610AFAD28719BDD3B49D0@BYAPR08MB6038.namprd08.prod.outlook.com> <CY4PR12MB1704E7FA436170900F38E23C959D0@CY4PR12MB1704.namprd12.prod.outlook.com>, <20200617001315.GB80914@x270>
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Navdeep Thanks for getting back ; I’ll do some digging. Back to the question about running with LACP debug on . Does this put the nics into promiscuous mode ? --- Mark Saad | mark.saad@lucera.com > On Jun 16, 2020, at 8:13 PM, Navdeep Parhar <np@freebsd.org> wrote: > > We could have a global knob that tells all NIC drivers to use a reserved > queue for non-RSS traffic, but that would be advisory at best because > the tx queue selection takes place inside the driver's (or iflib's) > transmit routine. The meat of the change is going to be in iflib and > all non-iflib drivers' if_transmit. > > Regards, > Navdeep > >> On Tue, Jun 16, 2020 at 09:48:19PM +0000, Saad, Mark wrote: >> 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" >> >
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