CPU requirement gone up?
(Linux 6.8.0-90-ge...) Tor 0.4.8.21 (recommended) I used spin up Webtunnels on very cheap VPS, bandwidth and uptime being my main consideration. But in recent days CPU is 99% even at quiet sites with under 50 outgoing connections. This is new. It would run at 30-50% before. Gerry
On 30.12.2025 10:16 DocGerry via tor-relays wrote:
I used spin up Webtunnels on very cheap VPS, bandwidth and uptime being my main consideration. But in recent days CPU is 99% even at quiet sites with under 50 outgoing connections. This is new. It would run at 30-50% before.
A VPS is shared and the timeslots for your CPU cycles are too. If the system is heavily overbooked (common there to achieve the low price), the CPU cycles available to your system are that low that processes need to wait. Have a look at load avg in top/htop. If that is more than 1, processes needed that to wait. If this is much higher, the system is overloaded. Also check which processes consume much CPU time.
Thanks prompt reply Its only TOR using my CPU I just noticed this is from the very start up when building circuits and no users. Also I am using 3 different providers in 3 continents, and the results are the same, so I doubt local VPS sharing it the issue on all three at the same time. Gerry -----Original Message----- From: Marco Moock via tor-relays <tor-relays@lists.torproject.org> Sent: 30 December 2025 10:21 To: tor-relays@lists.torproject.org Subject: [tor-relays] Re: CPU requirement gone up? On 30.12.2025 10:16 DocGerry via tor-relays wrote:
I used spin up Webtunnels on very cheap VPS, bandwidth and uptime being my main consideration. But in recent days CPU is 99% even at quiet sites with under 50 outgoing connections. This is new. It would run at 30-50% before.
A VPS is shared and the timeslots for your CPU cycles are too. If the system is heavily overbooked (common there to achieve the low price), the CPU cycles available to your system are that low that processes need to wait. Have a look at load avg in top/htop. If that is more than 1, processes needed that to wait. If this is much higher, the system is overloaded. Also check which processes consume much CPU time. _______________________________________________ tor-relays mailing list -- tor-relays@lists.torproject.org To unsubscribe send an email to tor-relays-leave@lists.torproject.org
On 30.12.2025 10:58 <gerard@bulger.co.uk> wrote:
I just noticed this is from the very start up when building circuits and no users.
Can you do a CPU benchmark? I can do the same on my machine. I am running TOR on an old Atom D525 with more than 20 MBit/s throughput. -- kind regards Marco Send spam to abfall1767088708@stinkedores.dorfdsl.de
It's a known issue https://forum.torproject.org/t/webtunnel-bridge-100-cpu-usage/20832 https://gitlab.torproject.org/tpo/core/tor/-/issues/41172 At the Moment you just have to wait or downgrade tor. On my bridges the high CPU usage doesn't seem to have an impact on the throughput. So as long as you don't have other services affected or break fair use policies by your VPS provider i would just let them run. On 30-12-2025 11:16, DocGerry via tor-relays wrote:
(Linux 6.8.0-90-ge...) Tor 0.4.8.21 (recommended)
I used spin up Webtunnels on very cheap VPS, bandwidth and uptime being my main consideration. But in recent days CPU is 99% even at quiet sites with under 50 outgoing connections. This is new. It would run at 30-50% before.
Gerry
_______________________________________________ tor-relays mailing list -- tor-relays@lists.torproject.org To unsubscribe send an email to tor-relays-leave@lists.torproject.org
https://forum.torproject.org/t/webtunnel-bridge-100-cpu-usage/20832
(Linux 6.8.0-90-ge...) Tor 0.4.8.21 (recommended)
I used spin up Webtunnels on very cheap VPS, bandwidth and uptime being my main consideration. But in recent days CPU is 99% even at quiet sites with under 50 outgoing connections. This is new. It would run at 30-50% before.
Gerry
_______________________________________________ tor-relays mailing list --tor-relays@lists.torproject.org To unsubscribe send an email totor-relays-leave@lists.torproject.org
participants (4)
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excurso -
gerard＠bulger.co.uk -
jarl -
Marco Moock