Just for comparison sake, I'm running a relay on the BeagleBone Black, running Ubuntu (raring), and Tor 0.2.4.17-rc with the following log entries:
Sep 19 16:16:40.000 [notice] Circuit handshake stats since last time: 16771/16781 TAP, 13/13 NTor. Sep 19 17:16:40.000 [notice] Circuit handshake stats since last time: 17229/17240 TAP, 14/14 NTor. Sep 19 18:16:40.000 [notice] Circuit handshake stats since last time: 17371/17385 TAP, 13/13 NTor. Sep 19 19:16:40.000 [notice] Circuit handshake stats since last time: 17084/17099 TAP, 17/17 NTor. Sep 19 20:16:40.000 [notice] Circuit handshake stats since last time: 16694/16702 TAP, 13/13 NTor. Sep 19 21:16:40.000 [notice] Circuit handshake stats since last time: 17380/17382 TAP, 20/20 NTor. Sep 19 21:16:45.000 [notice] Heartbeat: Tor's uptime is 11 days 18:00 hours, with 715 circuits open. I've sent 221.93 GB and received 225.81 GB. Sep 19 21:16:45.000 [notice] Average packaged cell fullness: 87.388% Sep 19 21:16:45.000 [notice] TLS write overhead: 8%
I currently have the Fast, Guard, Named, Running, Stable and Valid flags.
I initially had a "your computer is too slow" message and then I set MaxAdvertisedBandwidth to 200KB and it's be better since. CPU usage is about 70%.
The BBB actually has an AES crypto accelerator, but I don't think it's being used and I'm trying to work through that at the moment.
Lastly (an somewhat related), I submitted a workshop proposal to 30C3 called "Using the BeagleBone for Fun and Privacy" to talk about BeagleBone hacking and running Tor. I won't find out if it's accepted until November...
Josh