[tor-relays] Tor CPU usage
teor
teor2345 at gmail.com
Fri Jun 30 01:11:08 UTC 2017
> On 30 Jun 2017, at 04:52, Arisbe <arisbe at cni.net> wrote:
>
> I have a small Tor exit relay (VPS) running at +90% CPU capacity.
What version of Tor?
Has this only happened recently?
Did you upgrade your Tor version?
Are you running a caching DNS server?
> Memory usage is negligible. I am unable to launch ARM as the single CPU cannot process both Tor and arm. Traffic is mostly high for a small node.
>
> I have CPUsNum set at 2 in my torrc from its original setup.
Have you tried removing this from your torrc?
> However, pidstat 5 -p <pid> shows that only 1 CPU is employed. lscpu shows that the VPS is allotted 2 cpus.
2 cores, or hyperthreading on the same core?
Do you have any CPU masking options set?
Tor uses threads, rather than using multiple processes.
> CPU speed is around 2.44 M.
>
> I'm hoping someone has some experience with this issue and can give me advice.
This is what I'd expect for a relay.
Cryptography is expensive.
T
--
Tim Wilson-Brown (teor)
teor2345 at gmail dot com
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