# systemd-logind
# strace -w -C -p 8106 2>&1
strace: Process 8106 attached
epoll_wait(4, [{EPOLLIN, {u32=11, u64=11}}], 12, -1) = 1
clock_gettime(CLOCK_REALTIME, {tv_sec=1749030620, tv_nsec=988555184}) = 0
clock_gettime(CLOCK_MONOTONIC, {tv_sec=37150, tv_nsec=682438943}) = 0
clock_gettime(CLOCK_BOOTTIME, {tv_sec=42857, tv_nsec=988992932}) = 0
read(5, "\1\0\0\0\0\0\0\0", 8)          = 8
socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0) = 17
getsockopt(17, SOL_SOCKET, SO_SNDBUF, [212992], [4]) = 0
setsockopt(17, SOL_SOCKET, SO_SNDBUFFORCE, [8388608], 4) = -1 EPERM (Operation not permitted)
setsockopt(17, SOL_SOCKET, SO_SNDBUF, [8388608], 4) = 0
getuid32()                              = 0
geteuid32()                             = 0
getgid32()                              = 0
getegid32()                             = 0
sendmsg(17, {msg_name={sa_family=AF_UNIX, sun_path="/run/systemd/notify"}, msg_namelen=21, msg_iov=[{iov_base="WATCHDOG=1", iov_len=10}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 10
close(17)                               = 0
timerfd_settime(5, TFD_TIMER_ABSTIME, {it_interval={tv_sec=0, tv_nsec=0}, it_value={tv_sec=37270, tv_nsec=679936000}}, NULL) = 0
epoll_wait(4, [{EPOLLIN, {u32=11, u64=11}}], 12, -1) = 1
clock_gettime(CLOCK_REALTIME, {tv_sec=1749030740, tv_nsec=990172285}) = 0
clock_gettime(CLOCK_MONOTONIC, {tv_sec=37270, tv_nsec=684267915}) = 0
clock_gettime(CLOCK_BOOTTIME, {tv_sec=42977, tv_nsec=990899560}) = 0
read(5, "\1\0\0\0\0\0\0\0", 8)          = 8
socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0) = 17
getsockopt(17, SOL_SOCKET, SO_SNDBUF, [212992], [4]) = 0
setsockopt(17, SOL_SOCKET, SO_SNDBUFFORCE, [8388608], 4) = -1 EPERM (Operation not permitted)
setsockopt(17, SOL_SOCKET, SO_SNDBUF, [8388608], 4) = 0
getuid32()                              = 0
geteuid32()                             = 0
getgid32()                              = 0
getegid32()                             = 0
sendmsg(17, {msg_name={sa_family=AF_UNIX, sun_path="/run/systemd/notify"}, msg_namelen=21, msg_iov=[{iov_base="WATCHDOG=1", iov_len=10}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 10
close(17)                               = 0
timerfd_settime(5, TFD_TIMER_ABSTIME, {it_interval={tv_sec=0, tv_nsec=0}, it_value={tv_sec=37390, tv_nsec=679936000}}, NULL) = 0
epoll_wait(4, [{EPOLLIN, {u32=69933632, u64=69933632}}], 12, -1) = 1
clock_gettime(CLOCK_REALTIME, {tv_sec=1749030800, tv_nsec=331793091}) = 0
clock_gettime(CLOCK_MONOTONIC, {tv_sec=37330, tv_nsec=26149028}) = 0
clock_gettime(CLOCK_BOOTTIME, {tv_sec=43037, tv_nsec=332953741}) = 0
socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0) = 17
getsockopt(17, SOL_SOCKET, SO_SNDBUF, [212992], [4]) = 0
setsockopt(17, SOL_SOCKET, SO_SNDBUFFORCE, [8388608], 4) = -1 EPERM (Operation not permitted)
setsockopt(17, SOL_SOCKET, SO_SNDBUF, [8388608], 4) = 0
getuid32()                              = 0
geteuid32()                             = 0
getgid32()                              = 0
getegid32()                             = 0
sendmsg(17, {msg_name={sa_family=AF_UNIX, sun_path="/run/systemd/notify"}, msg_namelen=21, msg_iov=[{iov_base="WATCHDOG=1", iov_len=10}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 10
close(17)                               = 0
timerfd_settime(5, TFD_TIMER_ABSTIME, {it_interval={tv_sec=0, tv_nsec=0}, it_value={tv_sec=37450, tv_nsec=679936000}}, NULL) = 0
recvmsg(11, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="l\4\1\1\251\2\0\0qL\0\0\245\0\0\0\1\1o\0003\0\0\0", iov_len=24}], msg_iovlen=1, msg_controllen=0, msg_flags=MSG_CMSG_CLOEXEC}, MSG_DONTWAIT|MSG_NOSIGNAL|MSG_CMSG_CLOEXEC) = 24
recvmsg(11, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="/org/freedesktop/systemd1/unit/p"..., iov_len=841}], msg_iovlen=1, msg_controllen=0, msg_flags=MSG_CMSG_CLOEXEC}, MSG_DONTWAIT|MSG_NOSIGNAL|MSG_CMSG_CLOEXEC) = 841
epoll_wait(4, [{EPOLLIN, {u32=69933632, u64=69933632}}], 12, -1) = 1
clock_gettime(CLOCK_REALTIME, {tv_sec=1749030800, tv_nsec=338186877}) = 0
clock_gettime(CLOCK_MONOTONIC, {tv_sec=37330, tv_nsec=32112044}) = 0
clock_gettime(CLOCK_BOOTTIME, {tv_sec=43037, tv_nsec=338807594}) = 0
recvmsg(11, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="l\4\1\1,\3\0\0rL\0\0\245\0\0\0\1\1o\0003\0\0\0", iov_len=24}], msg_iovlen=1, msg_controllen=0, msg_flags=MSG_CMSG_CLOEXEC}, MSG_DONTWAIT|MSG_NOSIGNAL|MSG_CMSG_CLOEXEC) = 24
recvmsg(11, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="/org/freedesktop/systemd1/unit/p"..., iov_len=972}], msg_iovlen=1, msg_controllen=0, msg_flags=MSG_CMSG_CLOEXEC}, MSG_DONTWAIT|MSG_NOSIGNAL|MSG_CMSG_CLOEXEC) = 972
epoll_wait(4, [{EPOLLIN, {u32=69933632, u64=69933632}}], 12, -1) = 1
clock_gettime(CLOCK_REALTIME, {tv_sec=1749030800, tv_nsec=363756552}) = 0
clock_gettime(CLOCK_MONOTONIC, {tv_sec=37330, tv_nsec=57567400}) = 0
clock_gettime(CLOCK_BOOTTIME, {tv_sec=43037, tv_nsec=364093735}) = 0
recvmsg(11, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="l\4\1\1\251\2\0\0sL\0\0\245\0\0\0\1\1o\0003\0\0\0", iov_len=24}], msg_iovlen=1, msg_controllen=0, msg_flags=MSG_CMSG_CLOEXEC}, MSG_DONTWAIT|MSG_NOSIGNAL|MSG_CMSG_CLOEXEC) = 24
recvmsg(11, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="/org/freedesktop/systemd1/unit/p"..., iov_len=841}], msg_iovlen=1, msg_controllen=0, msg_flags=MSG_CMSG_CLOEXEC}, MSG_DONTWAIT|MSG_NOSIGNAL|MSG_CMSG_CLOEXEC) = 841
epoll_wait(4, [{EPOLLIN, {u32=69933632, u64=69933632}}], 12, -1) = 1
clock_gettime(CLOCK_REALTIME, {tv_sec=1749030800, tv_nsec=366119821}) = 0
clock_gettime(CLOCK_MONOTONIC, {tv_sec=37330, tv_nsec=60063582}) = 0
clock_gettime(CLOCK_BOOTTIME, {tv_sec=43037, tv_nsec=366769028}) = 0
recvmsg(11, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="l\4\1\1$\3\0\0tL\0\0\245\0\0\0\1\1o\0003\0\0\0", iov_len=24}], msg_iovlen=1, msg_controllen=0, msg_flags=MSG_CMSG_CLOEXEC}, MSG_DONTWAIT|MSG_NOSIGNAL|MSG_CMSG_CLOEXEC) = 24
recvmsg(11, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="/org/freedesktop/systemd1/unit/p"..., iov_len=964}], msg_iovlen=1, msg_controllen=0, msg_flags=MSG_CMSG_CLOEXEC}, MSG_DONTWAIT|MSG_NOSIGNAL|MSG_CMSG_CLOEXEC) = 964
epoll_wait(4, [{EPOLLIN, {u32=69933632, u64=69933632}}], 12, -1) = 1
clock_gettime(CLOCK_REALTIME, {tv_sec=1749030800, tv_nsec=369136459}) = 0
clock_gettime(CLOCK_MONOTONIC, {tv_sec=37330, tv_nsec=63143187}) = 0
clock_gettime(CLOCK_BOOTTIME, {tv_sec=43037, tv_nsec=369670512}) = 0
recvmsg(11, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="l\4\1\1P\0\0\0uL\0\0\205\0\0\0\1\1o\0\31\0\0\0", iov_len=24}], msg_iovlen=1, msg_controllen=0, msg_flags=MSG_CMSG_CLOEXEC}, MSG_DONTWAIT|MSG_NOSIGNAL|MSG_CMSG_CLOEXEC) = 24
recvmsg(11, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="/org/freedesktop/systemd1\0\0\0\0\0\0\0"..., iov_len=208}], msg_iovlen=1, msg_controllen=0, msg_flags=MSG_CMSG_CLOEXEC}, MSG_DONTWAIT|MSG_NOSIGNAL|MSG_CMSG_CLOEXEC) = 208
epoll_wait(4, [{EPOLLIN, {u32=11, u64=11}}], 12, -1) = 1
clock_gettime(CLOCK_REALTIME, {tv_sec=1749030920, tv_nsec=988623768}) = 0
clock_gettime(CLOCK_MONOTONIC, {tv_sec=37450, tv_nsec=682909659}) = 0
clock_gettime(CLOCK_BOOTTIME, {tv_sec=43157, tv_nsec=989576565}) = 0
read(5, "\1\0\0\0\0\0\0\0", 8)          = 8
socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0) = 17
getsockopt(17, SOL_SOCKET, SO_SNDBUF, [212992], [4]) = 0
setsockopt(17, SOL_SOCKET, SO_SNDBUFFORCE, [8388608], 4) = -1 EPERM (Operation not permitted)
setsockopt(17, SOL_SOCKET, SO_SNDBUF, [8388608], 4) = 0
getuid32()                              = 0
geteuid32()                             = 0
getgid32()                              = 0
getegid32()                             = 0
sendmsg(17, {msg_name={sa_family=AF_UNIX, sun_path="/run/systemd/notify"}, msg_namelen=21, msg_iov=[{iov_base="WATCHDOG=1", iov_len=10}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 10
close(17)                               = 0
timerfd_settime(5, TFD_TIMER_ABSTIME, {it_interval={tv_sec=0, tv_nsec=0}, it_value={tv_sec=37570, tv_nsec=679936000}}, NULL) = 0
epoll_wait(4, [{EPOLLIN, {u32=11, u64=11}}], 12, -1) = 1
clock_gettime(CLOCK_REALTIME, {tv_sec=1749031040, tv_nsec=987845281}) = 0
clock_gettime(CLOCK_MONOTONIC, {tv_sec=37570, tv_nsec=681926855}) = 0
clock_gettime(CLOCK_BOOTTIME, {tv_sec=43277, tv_nsec=988585169}) = 0
read(5, "\1\0\0\0\0\0\0\0", 8)          = 8
socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0) = 17
getsockopt(17, SOL_SOCKET, SO_SNDBUF, [212992], [4]) = 0
setsockopt(17, SOL_SOCKET, SO_SNDBUFFORCE, [8388608], 4) = -1 EPERM (Operation not permitted)
setsockopt(17, SOL_SOCKET, SO_SNDBUF, [8388608], 4) = 0
getuid32()                              = 0
geteuid32()                             = 0
getgid32()                              = 0
getegid32()                             = 0
sendmsg(17, {msg_name={sa_family=AF_UNIX, sun_path="/run/systemd/notify"}, msg_namelen=21, msg_iov=[{iov_base="WATCHDOG=1", iov_len=10}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 10
close(17)                               = 0
timerfd_settime(5, TFD_TIMER_ABSTIME, {it_interval={tv_sec=0, tv_nsec=0}, it_value={tv_sec=37690, tv_nsec=679936000}}, NULL) = 0
epoll_wait(4, [{EPOLLIN, {u32=11, u64=11}}], 12, -1) = 1
clock_gettime(CLOCK_REALTIME, {tv_sec=1749031160, tv_nsec=988319914}) = 0
clock_gettime(CLOCK_MONOTONIC, {tv_sec=37690, tv_nsec=682969865}) = 0
clock_gettime(CLOCK_BOOTTIME, {tv_sec=43397, tv_nsec=989923904}) = 0
read(5, "\1\0\0\0\0\0\0\0", 8)          = 8
socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0) = 17
getsockopt(17, SOL_SOCKET, SO_SNDBUF, [212992], [4]) = 0
setsockopt(17, SOL_SOCKET, SO_SNDBUFFORCE, [8388608], 4) = -1 EPERM (Operation not permitted)
setsockopt(17, SOL_SOCKET, SO_SNDBUF, [8388608], 4) = 0
getuid32()                              = 0
geteuid32()                             = 0
getgid32()                              = 0
getegid32()                             = 0
sendmsg(17, {msg_name={sa_family=AF_UNIX, sun_path="/run/systemd/notify"}, msg_namelen=21, msg_iov=[{iov_base="WATCHDOG=1", iov_len=10}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 10
close(17)                               = 0
timerfd_settime(5, TFD_TIMER_ABSTIME, {it_interval={tv_sec=0, tv_nsec=0}, it_value={tv_sec=37810, tv_nsec=679936000}}, NULL) = 0
epoll_wait(4, ^Cstrace: Process 8106 detached
 <detached ...>
% time     seconds  usecs/call     calls    errors syscall
------ ----------- ----------- --------- --------- ----------------
100.00  560.319002    56031900        10           epoll_wait
  0.00    0.003293         109        30           clock_gettime
  0.00    0.002559         426         6           sendmsg
  0.00    0.001984         330         6           socket
  0.00    0.001497         149        10           recvmsg
  0.00    0.001310         109        12         6 setsockopt
  0.00    0.000756         126         6           geteuid32
  0.00    0.000748         124         6           close
  0.00    0.000673         112         6           getsockopt
  0.00    0.000616         102         6           getegid32
  0.00    0.000599          99         6           getgid32
  0.00    0.000580          96         6           getuid32
  0.00    0.000550          91         6           timerfd_settime
  0.00    0.000522         104         5           read
------ ----------- ----------- --------- --------- ----------------
100.00  560.334689     4630865       121         6 total