I wonder if anyone has ever looked at this? It looks like there is something wrong here.
I was just looking at some results from a stock 2.6.35 kernel doing TCP over IPoIB (2k MTU) and CUBIC looks like it is going nutz, you can see in a bandwidth plot a fairly characteristic saw tooth pattern, and diminished bandwidth. The effect compounds rather dramatically as the RTT goes up. This isn't really my area of expertise, so I wonder if someone else has looked into this? Errant congestion events will sap bandwidth even on low latency links.. Cheers, Jason -- 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
