[tor-relays] Why can't I see more traffic? (is my banana too weak?)

[Aeris]

> According to 'openssl speed aes-128-cbc' the Allwinner A20 CPU in Banana Pro
> is capable of about 25 MBytes/sec in AES performance. While that won't
> translate 1:1 into Tor performance, as Farid noted in his case the CPU
> isn't being a bottleneck, with only 10-20% CPU load observed.

I don’t understand very well this fact, but CPU can be the bottleneck even if 
load or CPU usage not at full capacity.

One of my Tor guard relay have the same CPU behaviour (see screenshot 
enclosed).
2 instances at 50-60% CPU usage (as reported by htop), load around 0.70-0.80 
(4 cores), RAM at 20% (400MB/2GB) but bandwidth not saturated (20Mbps only on 
a 200Mbps line).
Perhaps because of the multiple changes of context (AES crypto, Tor software 
logic, network IO…) and so a lot of wait/IRQ (as visible on the screen) and 
not a fully used CPU.

> Also seems unclear why it didn't get the guard flag for so long, does your
> public IP address change from time to time? Or do you turn the relay off and
> on for whatever reason.

Perhaps a low bandwidth ?
Babylonian seems to be on the lower part of guard relay (2146/2313), possible 
it hadn’t enough bandwith before end of august to get guard flags ?
Only the 25% fastest relays can get the guard flag. Today it’s around 2.5 MBps 
advertised / 1MBps measured. Babylonian is just at the limit (2.45MBps 
advertised, 600kBps measured).

<3,
-- 
Aeris
Individual crypto-terrorist group self-radicalized on the digital Internet
https://imirhil.fr/

Protect your privacy, encrypt your communications
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