Date: Fri, 28 May 2021 19:00:15 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=256217 --- Comment #5 from Christos Chatzaras <email@example.com> --- To avoid reboot I did this which I believe is the same: sysctl net.inet.tcp.functions_default net.inet.tcp.functions_default: freebsd kldload tcp_rack sysctl net.inet.tcp.functions_default=rack I restart all services so new connections (mostly nginx) use "rack". I wait for few minutes and interrupts increase to ~5% sysctl net.inet.tcp.functions_default=freebsd tcpdrop -S rack Interrupts decrease to ~ 0.3% (looks like less connections = less interrupts) New connections still use "rack", so I restart again all services. Now all connections use "freebsd" and interrupts decrease to ~ 0.0% ---- Also something I notice is that during the issue if I run "sysctl kern.eventtimer.timer=HPET" then interrupts immediately increase. If I run "sysctl kern.eventtimer.timer=LAPIC" the interrupts immediately decrease. ---- So it looks like that active rack connections cause the issue. -- You are receiving this mail because: You are the assignee for the bug.