I'm not familiar with fq_codel, but it doesn't look to have priority queues which is one of our primary concerns. 40 Gb is pretty fast, but we are concerned about run away processes in our cluster that could saturate uplinks or even the PCI bus at these speeds. We need to keep heartbeats and management traffic alive to be able to solve these problems. It seems that fq_codel really helps with latency and bufferbloat (which would also be good for us) and it is possible that it would be adequate since we are DSCP marking packets and the switches are applying L2 COS. I'll have to look over it. If you have some information that would be helpful, I'd be happy to have it. On Wed, Mar 18, 2015 at 4:41 PM, Dave Taht <dave.taht@xxxxxxxxx> wrote: > On Wed, Mar 18, 2015 at 3:03 PM, Robert LeBlanc <robert@xxxxxxxxxx> wrote: >> >> I can't speak for the specific configuration, but we are having >> challenges using the mqprio qdisc on the Intel XL710 adapters. We have >> engaged Intel, but we are still having trouble. If you want priority >> queuing and using the hardware TX queues, you may have problems with >> this family of cards. > > > I am very curious about benchmarks of fq_codel (vs mqprio or > pfifo_fast) at these speeds on adaptors like this, preferably driven > by repeatable tests like the rrul test in netperf-wrapper. > > In particular, what happens if only one tx queue is enabled with fq_codel? > >> >> On Wed, Mar 18, 2015 at 1:07 PM, Nieścierowicz Adam >> <adam.niescierowicz@xxxxxxxxxx> wrote: >> > Hi, >> > >> > in the near future we are planning to purchase new equipment for the router. >> > >> > Our requirements are: >> > >> > - four or more 1GbE interfaces >> > >> > - two-four 10GbE interfaces >> > >> > - two 40GbE interfaces >> > >> > - multicast routing with throughput input 1-2 Gb/s output 4x1-2Gb/s >> > >> > Can someone share your experience what equipment you choose to such a >> > configuration >> > >> > --- >> > Thanks, >> > Adam Nieścierowicz >> > -- >> > To unsubscribe from this list: send the line "unsubscribe lartc" in >> > the body of a message to majordomo@xxxxxxxxxxxxxxx >> > More majordomo info at http://vger.kernel.org/majordomo-info.html >> -- >> To unsubscribe from this list: send the line "unsubscribe lartc" in >> the body of a message to majordomo@xxxxxxxxxxxxxxx >> More majordomo info at http://vger.kernel.org/majordomo-info.html > > > > > -- > Dave Täht > Let's make wifi fast, less jittery and reliable again! > > https://plus.google.com/u/0/107942175615993706558/posts/TVX3o84jjmb -- To unsubscribe from this list: send the line "unsubscribe lartc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
