Hi Sebastian, On 11:37 Tue 31 Jul , Sebastian Riemer wrote: > Hi all, > > could someone please explain what I can do with the new congestion control? > > Do I understand it right that I can influence the flow control (e.g. > amount of credits) with it so that I can avoid disruption (XmitWait, > XmitDiscardedPackets) caused by congestion?
Congestion control isn't a credit based mechanism. While InfiniBand flow control is defined between two ports of the same link, congestion control is working across the fabric between a congestion point (a switch) and a reaction point (source node). Reaction point implements a Congestion Control Table that contains an array of values of injection rate delay used to control congestion. You can find more information in the IBTA LWG Errata document 3Q2010. -- Alex -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
