Hi Christopher How many open connections do you have? (`ss -s`) Do you happen to use OutboundBindAddress in your torrc?
What I think we need is for the Tor developers to include this PR in a release: https://gitlab.torproject.org/tpo/core/tor/-/merge_requests/579 Once that has happened, I think the problem should go away, as long as you run a recent enough Linux kernel that supports IP_BIND_ADDRESS_NO_PORT (since Linux 4.2). - Anders fre. 2. dec. 2022 kl. 09.24 skrev Christopher Sheats < yawn...@emeraldonion.org>: > Hello tor-relays, > > We are using Ubuntu server currently for our exit relays. Occasionally, > exit throughput will drop from ~4Gbps down to ~200Mbps and the only > observable data point that we have is a significant increase in > inet_csk_bind_conflict, as seen via 'perf top', where it will hit 85% > [kernel] utilization. > > A while back we thought we solved with with two /etc/sysctl.conf settings: > net.ipv4.ip_local_port_range = 1024 65535 > net.ipv4.tcp_tw_reuse = 1 > > However we are still experiencing this problem. > > Both of our (currently, two) relay servers suffer from the same problem, > at the same time. They are AMD Epyc 7402P bare-metal servers each with 96GB > RAM, each has 20 exit relays on them. This issue persists after upgrading > to 0.4.7.11. > > Screenshots of perf top are shared here: > https://digitalcourage.social/@EmeraldOnion/109440197076214023 > > Does anyone have experience troubleshooting and/or fixing this problem? > > Cheers, > > -- > Christopher Sheats (yawnbox) > Executive Director > Emerald Onion > Signal: +1 206.739.3390 > Website: https://emeraldonion.org/ > Mastodon: https://digitalcourage.social/@EmeraldOnion/ > > > > > _______________________________________________ > tor-relays mailing list > tor-relays@lists.torproject.org > https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-relays >
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