I got a reply from the engineering team: A workaround is to reinitialize everything. Instead of:
tc qdisc replace dev enp130s0f0 root mqprio num_tc 1 hw 1 mode channel shaper bw_rlimit min_rate 0Mbit max_rate 500Mbit map 0 0 0 0 0 0 0 0 queues 1@0 tc qdisc change dev enp130s0f0 root mqprio num_tc 1 hw 1 mode channel shaper bw_rlimit min_rate 0Mbit max_rate 200Mbit map 0 0 0 0 0 0 0 0 queues 1@0 Can you do this: tc qdisc replace dev enp130s0f0 root mqprio num_tc 1 hw 1 mode channel shaper bw_rlimit min_rate 0Mbit max_rate 500Mbit map 0 0 0 0 0 0 0 0 queues 1@0 tc qdisc del dev enp130s0f0 root tc qdisc replace dev enp130s0f0 root mqprio num_tc 1 hw 1 mode channel shaper bw_rlimit min_rate 0Mbit max_rate 200Mbit map 0 0 0 0 0 0 0 0 queues 1@0 They did mention this would inactivate the filters, so if you need leave them on we'll need to do some more work on our end. Todd Fujinaka Software Application Engineer Ethernet Products Group Intel Corporation todd.fujin...@intel.com -----Original Message----- From: David Hayes <dav...@simula.no> Sent: Thursday, April 21, 2022 2:47 AM To: Fujinaka, Todd <todd.fujin...@intel.com> Cc: e1000-de...@lists.sf.net Subject: Re: [E1000-devel] tc changing mqprio parameters X710-T4L Hi Todd, Thank you for getting back to me. It is probably easier if you file the bug. A little more information in case it is useful: We have also tried this running the 5.17.1 kernel with the same result. When the OS starts, the interfaces are initially given default fq_codel qdiscs. We are able to replace these with the mqprio qdisc, but after doing that we can make no further changes. The cards have the latest (8.60 version) firmware installed. Thanks and regards, David On Wed, Apr 20 2022 at 19:01, "Fujinaka, Todd" <todd.fujin...@intel.com> wrote: > Do you have some way to file a bug with us through your factory > contact? Otherwise I will file a bug and then relay the info via > email. > > Todd Fujinaka > Software Application Engineer > Ethernet Products Group > Intel Corporation > todd.fujin...@intel.com > > -----Original Message----- > From: David Hayes <dav...@simula.no> > Sent: Wednesday, April 13, 2022 5:27 AM > To: e1000-de...@lists.sf.net > Subject: [E1000-devel] tc changing mqprio parameters X710-T4L > > > Hi list, > > We are using a couple of X710-T4L cards in an experimental testbed. > The computer with the cards is currently manjaro linux > 5.17rc7 kernel, and cards have been updated with the latest nvm 8.60. > As part of the work we wish to periodically change the shapers' > max_rate parameter. > > We set up the qdisc as follows: > > # tc qdisc replace dev <interface> root mqprio num_tc 1 hw 1 mode > channel shaper bw_rlimit min_rate 0Mbit max_rate 500Mbit map 0 > 0 > 0 0 0 0 0 0 queues 1@0 > > This works well and we are able to confirm the 500Mbit limit > experimentally. > > However, when we try to change the speed: > > # tc qdisc change dev <interface> root mqprio num_tc 1 hw 1 mode > channel shaper bw_rlimit min_rate 0Mbit max_rate 200Mbit map 0 > 0 > 0 0 0 0 0 0 queues 1@0 > > we get the following error message: > > Change operation is not supported by specified qdisc > > We are also unable use "replace" a second time. > > I know our use case is a little unusual, but it is simple. Does anyone > have any ideas what the problem could be and how we can fix it or work > around it? > > Many thanks, > > David > > > > _______________________________________________ > E1000-devel mailing list > E1000-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/e1000-devel > To learn more about Intel Ethernet, visit > https://forums.intel.com/s/topic/0TO0P00000018NbWAI/intel-ethernet -- David Hayes SimulaMet https://www.simula.no/people/davidh _______________________________________________ E1000-devel mailing list E1000-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/e1000-devel To learn more about Intel Ethernet, visit https://forums.intel.com/s/topic/0TO0P00000018NbWAI/intel-ethernet
