On Fri, May 15, 2015 at 12:44:03PM +0100, Martin Beynon wrote: > > That is right from 100Mbps down to 150 kpbs everything works as expected. > As I continue tuning down the bandwidth below 150kbps openssl starts to > stop sending data. It becomes very bursty and there are whole periods of > seconds where no data is sent from openssl even though it's 17KB TLS buffer > is full and pings, for example, can be sent and received normally. > > There appears to be some relation to the size of this buffer and the > minimum achievable throughput we can get.. Unless my maths is off; 140 Kbps > would give about 17KB/s throughput.. Coincidence? Do you send packets to OpenSSL in blocks of 17 KB? Is that blocking or non-blocking? Kurt
