Hi all, On our infra, we have two machines running Fedora with FreeIPA installed.
we have an issue with ns-slapd using 100% of CPU after a while. If we restart the service, it starts to use all CPU resources after one day. Outpute of the command strace -c -p <ns-slapd PID> running for 4 minutes is: % time seconds usecs/call calls errors syscall ------ ----------- ----------- --------- --------- ---------------- 99.80 229.603633 11247 20415 poll 0.15 0.340032 10 32983 4 futex 0.05 0.114068 114068 1 restart_syscall 0.00 0.003464 0 20420 20416 getpeername 0.00 0.002752 0 20416 clock_gettime 0.00 0.001920 0 9840 read 0.00 0.000205 5 45 close 0.00 0.000036 2 22 access 0.00 0.000017 1 22 open 0.00 0.000016 1 24 accept 0.00 0.000012 0 45 setsockopt 0.00 0.000007 0 22 fstat 0.00 0.000000 0 22 stat 0.00 0.000000 0 1 sendto 0.00 0.000000 0 24 getsockname 0.00 0.000000 0 4 getsockopt 0.00 0.000000 0 70 fcntl 0.00 0.000000 0 22 gettimeofday ------ ----------- ----------- --------- --------- ---------------- 100.00 230.066162 104398 20420 total Plus we looked at the syscalls using FTrace: ns-slapd-7963 [000] .... 4063846.395630: sys_sched_yield() ns-slapd-7956 [000] .... 4063846.395631: sys_sched_yield -> 0x0 ns-slapd-7956 [000] .... 4063846.395632: sys_sched_yield() ns-slapd-7973 [000] .... 4063846.395633: sys_sched_yield -> 0x0 ns-slapd-7973 [000] .... 4063846.395634: sys_sched_yield() ns-slapd-7965 [000] .... 4063846.395635: sys_sched_yield -> 0x0 ns-slapd-7965 [000] .... 4063846.395637: sys_sched_yield() ns-slapd-7963 [000] .... 4063846.395637: sys_sched_yield -> 0x0 ns-slapd-7963 [000] .... 4063846.395639: sys_sched_yield() ns-slapd-7956 [000] .... 4063846.395640: sys_sched_yield -> 0x0 ns-slapd-7956 [000] .... 4063846.395641: sys_sched_yield() ns-slapd-7973 [000] .... 4063846.395642: sys_sched_yield -> 0x0 ns-slapd-7973 [000] .... 4063846.395643: sys_sched_yield() ns-slapd-7965 [000] .... 4063846.395644: sys_sched_yield -> 0x0 The sys_sched_yield function is called almost every 2 microseconds. It seems too much. Anyone have an idea where this can come from? Bad configuration on our side or some bug on ns-slapd? Regards, Luis Domingues
-- Manage your subscription for the Freeipa-users mailing list: https://www.redhat.com/mailman/listinfo/freeipa-users Go to http://freeipa.org for more info on the project