[tor-relays] Low observed bandwith

[torjoy]

Hi Mario,

I'm having same trouble with raspberry pi 3b... I use Wi-Fi connection with high throughput. My local connection can copy files up to 15MB/s to this RPi. It is a USB adapter (mediatek MT7601). I'm asking myself that speed on tor network shouldn't be more than 2 MB/s. I've limited the maximum in 3,2 MB/s and burst to 4,3 MB/s, my connection here in Brazil is just of 240 Mb/s // 24 Mb/s... At least 2,2 MB/s should be reached in the measurements i guess. In the past i shouldn't pass from 600 KB/s thus because my CPU consumption with TOR was near to 100%. But i've set more parallel threads in torrc and recompilled my openssl to support it the linux crypto engine, that can handle faster crypto operations. With this i've enabled hardware acceleration on torrc and reached a little bit more than 1MB/s in the measurements.

Luiz


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‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
Em Sábado, 11 de Abril de 2020 às 09:55, Mario Costa <mario.costa at icloud.com> escreveu:

> Hi list,
>
> I’m running a guard relay from my home connection on a Raspberry Pi 4. My internet connection is 1000/100 Mbps, and I thought I’d allocate half of the upload bandwidth for the relay. Then I set RelayBandwidthRate to 10 MB/s, because I thought that Tor would upload 5 MB/s and download 5 MB/s.
>
> However, the maximum observed bandwidth was always about 6 MB/s. I’d like to know what could cause this low observed bandwidth. I don’t think it’s the Raspberry Pi, because CPU usage is always low and it has a Gigabit connection to the router.
>
> The router itself easily reaches Gigabit speeds, so 10 MB/s should be a breeze. Could it be the number of connections? nyx indicates that the connections are always about 4000. If this is the case, how can I know if the connections bottleneck is the router or the Raspberry Pi?
>
> Additionally, I’d like to ask for a rule of thumb for setting the RelayBandwithBurst. I set it to 20 MB/s because I’m ok with the relay using the whole upload bandwidth (about 10 MB/s, or 100 Mbps) for short periods of time, but as I already explained I’m never seeing such speeds.
>
> For reference my relay’s fingerprint is F942EE73F1B8E39125F617FA85E80E4C9E540A2E.
>
> -m
>
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