Date: Thu, 31 Jul 2014 22:24:11 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-ports-bugs@FreeBSD.org Subject: [Bug 192298] New: net/dhcprelya consumes cpu on FreeBSD 10 Message-ID: <bug-192298-13@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=192298 Bug ID: 192298 Summary: net/dhcprelya consumes cpu on FreeBSD 10 Product: Ports Tree Version: Latest Hardware: Any OS: Any Status: Needs Triage Severity: Affects Only Me Priority: --- Component: Individual Port(s) Assignee: freebsd-ports-bugs@FreeBSD.org Reporter: mcdouga9@egr.msu.edu I've been using dhcprelya for a while because it worked well with tun0 and openvpn. After upgrading such a server to FreeBSD 10, I noticed the load average stays around 0.70, approx 15% cpu usage from dhcprelya, and it is making repetitive calls. systat -vmstat 1 shows 10-30 thousand interrupts per second on the cpu timer with kern.eventtimer.timer=LAPIC (default), or 2 thousand per second with i8254 (lower cpu usage, but same load average). This issue can be reproduced easily, I just install dhcprelya on 10 and enable it on a spare interface with a dummy IP (no link necessary). I am willing to help figure this out if I can get some help. Thanks. rc.conf: dhcprelya_enable="YES" dhcprelya_servers="192.168.0.10" dhcprelya_ifaces="em3" truss -p shows: select(7,{6},0x0,0x0,{0.000010 }) = 0 (0x0) select(7,{6},0x0,0x0,{0.000010 }) = 0 (0x0) select(7,{6},0x0,0x0,{0.000010 }) = 0 (0x0) select(7,{6},0x0,0x0,{0.000010 }) = 0 (0x0) ... (many) select(7,{6},0x0,0x0,{0.000010 }) = 0 (0x0) select(7,{6},0x0,0x0,{0.000010 }) = 0 (0x0) read(5,0x80185b000,524288) = 0 (0x0) select(7,{6},0x0,0x0,{0.000010 }) = 0 (0x0) select(7,{6},0x0,0x0,{0.000010 }) = 0 (0x0) select(7,{6},0x0,0x0,{0.000010 }) = 0 (0x0) nanosleep({0.001000000 }) = 0 (0x0) select(7,{6},0x0,0x0,{0.000010 }) = 0 (0x0) ... kdump says: 1086 dhcprelya RET select 0 1086 dhcprelya CALL select(0x7,0x7fffffffe9e0,0,0,0x7fffffffea90) 1086 dhcprelya RET select 0 1086 dhcprelya CALL select(0x7,0x7fffffffe9e0,0,0,0x7fffffffea90) 1086 dhcprelya RET select 0 1086 dhcprelya CALL select(0x7,0x7fffffffe9e0,0,0,0x7fffffffea90) ... procstat -k 1086 flips between: PID TID COMM TDNAME KSTACK 1086 100395 dhcprelya - <running> 1086 100396 dhcprelya - mi_switch sleepq_catch_signals sleepq_timedwait_sig _sleep bpfread devfs_read_f dofileread kern_readv sys_read amd64_syscall Xfast_syscall and PID TID COMM TDNAME KSTACK 1086 100395 dhcprelya - mi_switch sleepq_catch_signals sleepq_timedwait_sig _cv_timedwait_sig_sbt seltdwait kern_select sys_select amd64_syscall Xfast_syscall 1086 100396 dhcprelya - mi_switch sleepq_catch_signals sleepq_timedwait_sig _sleep bpfread devfs_read_f dofileread kern_readv sys_read amd64_syscall Xfast_syscall -- You are receiving this mail because: You are the assignee for the bug.
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