> On June 1, 2015 at 12:36 PM Andy Furniss <adf.lists@xxxxxxxxx> wrote: > > > Robert LeBlanc wrote: > > -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 > > > > Any ideas on this? > > 40 gig nics are way beyond anything I've ever done with tc and I guess > involve some offload = huge "packets". > > It could be that aas sfq has a default qlen of 128 and as you are not > actually rate limiting (and to do that may be "interesting" at 80 gig) > the prio relies on some downstream buffer being full. Perhaps it's just > that at these rates prio can not dequeue anything for periods of time so > the 128 limit of sfq is overrun even for the highest prio. > > This is pure guesswork. > -- > 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 Alas, I haven't yet read the details of the original post but I know we just replaced all our sfq leaves with fq_codel because of concerns about the per flow packet depth on high speed, high latency networks. -- 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
