dtrace.log

# dtrace of rsyslog git master during 

logger -4 -h 127.0.0.1 hysteric
8804.086743385:imudp.c        : imudp: recvmmsg returned 1
8804.086771347:imudp.c        : imudp: recvmmsg returned -1
8804.086789418:imudp.c        : Listening on UDP syslogd socket 5 (IPv4/port 514).
# 8804.086801418:imudp.c        : --------imUDP calling select, active file descriptors (max 5): 5

# config

/usr/local/etc/rsyslog.conf
module(load="imtcp")
module(load="imklog")
module(load="imuxsock")
module(load="imudp")
input(type="imudp" address="127.0.0.1" port="514")
action(type="omfile" file="/var/log/rsyslog.log")

# /usr/local/share/dtrace-toolkit/dtruss -p 46181 -a -s
PID/LWP    RELATIVE  ELAPSD    CPU SYSCALL(args) 		 = return
 46181/100880:        26      74      8 write(0x1, "8713.574640499:main thread    : janitorRun() called\n\0", 0x34)		 = 52 0

              libc.so.7`_write+0xa
              rsyslogd`dbgprint+0x211
              rsyslogd`dbgprintf+0xe9
              rsyslogd`janitorRun+0x18
              rsyslogd`main+0x613
              rsyslogd`_start+0x17f
              ld-elf.so.1`0x8006b3000

 46181/101196:        10      55      3 recvmsg(0x5, 0x801E3BE00, 0x0)		 = 17 0

              libc.so.7`__sys_recvmsg+0xa
              imudp.so`wrkr+0x432
              imudp.so`runInput+0xba
              rsyslogd`thrdStarter+0x9d
              libthr.so.3`0x8014eab55

 46181/101196:        11       1      0 recvmsg(0x5, 0x801E3BE38, 0x0)		 = -1 Err#35

              libc.so.7`__sys_recvmsg+0xa
              imudp.so`wrkr+0x432
              imudp.so`runInput+0xba
              rsyslogd`thrdStarter+0x9d
              libthr.so.3`0x8014eab55

 46181/101196:        24       4      2 write(0x1, "8804.086743385:imudp.c        : imudp: recvmmsg returned 1\n\0", 0x3B)		 = 59 0

              libc.so.7`_write+0xa
              rsyslogd`dbgprint+0x211
              rsyslogd`dbgprintf+0xe9
              imudp.so`wrkr+0x468
              imudp.so`runInput+0xba
              rsyslogd`thrdStarter+0x9d
              libthr.so.3`0x8014eab55

 46181/101196:        30       1      0 recvmsg(0x5, 0x801E3BE00, 0x0)		 = -1 Err#35

              libc.so.7`__sys_recvmsg+0xa
              imudp.so`wrkr+0x432
              imudp.so`runInput+0xba
              rsyslogd`thrdStarter+0x9d
              libthr.so.3`0x8014eab55

 46181/101196:        33       2      0 write(0x1, "8804.086771347:imudp.c        : imudp: recvmmsg returned -1\n\0", 0x3C)		 = 60 0

              libc.so.7`_write+0xa
              rsyslogd`dbgprint+0x211
              rsyslogd`dbgprintf+0xe9
              imudp.so`wrkr+0x468
              imudp.so`runInput+0xba
              rsyslogd`thrdStarter+0x9d
              libthr.so.3`0x8014eab55

 46181/101196:        36       2      0 getsockname(0x5, 0x7FFFDF7F98A0, 0x7FFFDF7F989C)		 = 0 0

              libc.so.7`_getsockname+0xa
              imudp.so`wrkr+0x22a
              imudp.so`runInput+0xba
              rsyslogd`thrdStarter+0x9d
              libthr.so.3`0x8014eab55

 46181/101196:        41       4      2 write(0x1, "8804.086789418:imudp.c        : Listening on UDP syslogd socket 5 (IPv4/port 514).\n\0", 0x53)		 = 83 0

              libc.so.7`_write+0xa
              rsyslogd`dbgprint+0x211
              rsyslogd`dbgprintf+0xe9
              lmnet.so`debugListenInfo+0xa7
              imudp.so`wrkr+0x22a
              imudp.so`runInput+0xba
              rsyslogd`thrdStarter+0x9d
              libthr.so.3`0x8014eab55

 46181/101196:        45       2      1 write(0x1, "8804.086801418:imudp.c        : --------imUDP calling select, active file descriptors (max 5): \0", 0x5F)		 = 95 0

              libc.so.7`_write+0xa
              rsyslogd`dbgprint+0x211
              rsyslogd`dbgprintf+0xe9
              imudp.so`wrkr+0x27d
              imudp.so`runInput+0xba
              rsyslogd`thrdStarter+0x9d
              libthr.so.3`0x8014eab55

 46181/101196:        46       1      0 write(0x1, "5 \0", 0x2)		 = 2 0

              libc.so.7`_write+0xa
              rsyslogd`dbgprint+0x211
              rsyslogd`dbgprintf+0xe9
              imudp.so`wrkr+0x2b5
              imudp.so`runInput+0xba
              rsyslogd`thrdStarter+0x9d
              libthr.so.3`0x8014eab55

 46181/101196:        48       1      0 write(0x1, "\n\0", 0x1)		 = 1 0

              libc.so.7`_write+0xa
              rsyslogd`dbgprint+0x211
              rsyslogd`dbgprintf+0xe9
              imudp.so`wrkr+0x2cb
              imudp.so`runInput+0xba
              rsyslogd`thrdStarter+0x9d
              libthr.so.3`0x8014eab55