Hi, I've setup a wlan ap using a an alix 2d2 (AMD Geode LX 500 Mhz + AES Offload) and am now trying to encapsulate the wlan traffic into a vpn (tap bridge). Though even when disabling crypto and digest (there is a crypto engine onboard can be setup to handle tinc encryption), the best throughput I get is aroung 2,9 MByte per second (wget+http) (even if the client is run locally). The network card and the source do support up to 11 MByte/s and when using tinc the cpu loads go into the limits, so I guess to just copying memory or calculating way too much. Looking at the source, it looks like there isn't much copying at all, the only place it wasn't clear to me why copying occurs is at the beginning in route_mac when source and destination mac are copying into local variables, though changing that does not gain a lot. Running gprof it reports no time spent but only function calls, which hints that all time is lost in the kernel.
Does somebody have any numbers around on what one could expect on a 500 Mhz machine using tinc with/without encryption or on what to try out to improve throughput? Thanks a lot, Michael Braun _______________________________________________ tinc mailing list tinc@tinc-vpn.org http://www.tinc-vpn.org/cgi-bin/mailman/listinfo/tinc
