On 1/24/20 2:34 AM, Johannes Berg wrote: > On Fri, 2019-12-13 at 14:40 +0530, Krishna Chaitanya wrote: >> >> Maybe try 'reno' instead of 'cubic' to see if congestion control is >> being too careful? > > I played around with this a bit now, but apart from a few outliers, the > congestion control algorithm doesn't have much effect. The outliers are > > * vegas with ~120 Mbps > * nv with ~300 Mbps > * cdg with ~600 Mbps > > All the others from my list (reno cubic bbr bic cdg dctcp highspeed htcp > hybla illinois lp nv scalable vegas veno westwood yeah) are within 50 > Mbps or so from each other (around 1.45Gbps). > When the stalls happens, what is causing TCP to resume the xmit ? Some tcpdump traces could help. (-s 100 to only capture headers)
