MegaZone wrote: > Yeah, 7.1 was the first USB2.0 release, IIRC. Certainly not-pre 7.x > on standalone units. 6.x is the corresponding level for DirecTV. > Anything before that would be USB1.1 drivers, so it would limit > transfers quite a bit. > Yeah, and I think that was one of the reasons the backported driver suite was developed. Prior to 6.x/7.x many of us were replacing stock drivers with the backports. > Interesting about turning off netfilter. I wonder why that is active > to start with, the TiVo isn't designed to sit on an open network, and > they only listen on specific ports. I wouldn't think they need to do > packet filtering or NAPT, etc, and since it seems to have a noticable > performance impact, why have it in the kernel? I wonder if they're > actually using it for something... > Absolutely -- iptables by default on 6.x/7.x filters out almost everything. Hackers typically create dummy iptables files to bypass this so as to get telnet/ftp/etc. access. > I am surprised by the gains just from using jumbo frames. That is > fairly significant. > > While it is nice to see that performance can be significantly boosted, > it does make me wonder why TiVo hasn't used any of these tactics in > the standard release. > A good question -- but then, why did it take them so long to include USB 2.0 drivers? My guess is performance tuning simply isn't a priority for them.
--chris
