OS X Terminal Diagnostic commands dtrace

dtruss terminal command +

bitesize.d(1m) - analyse disk I/O size by process. Uses DTrace
cpuwalk.d(1m) - Measure which CPUs a process runs on. Uses DTrace
creatbyproc.d(1m) - snoop creat()s by process name. Uses DTrace
dappprof(1m) - profile user and lib function usage. Uses DTrace
dapptrace(1m) - trace user and library function usage. Uses DTrace
diskhits(1m) - disk access by file offset. Uses DTrace
dispqlen.d(1m) - dispatcher queue length by CPU. Uses DTrace
dtrace(1) - generic front-end to the DTrace facility
dtruss(1m) - process syscall details. Uses DTrace
errinfo(1m) - print errno for syscall fails. Uses DTrace
execsnoop(1m) - snoop new process execution. Uses DTrace
fddist(1m) - file descriptor usage distributions. Uses DTrace
filebyproc.d(1m) - snoop opens by process name. Uses DTrace
hotspot.d(1m) - print disk event by location. Uses DTrace
httpdstat.d(1m) - realtime httpd statistics. Uses DTrace
iofile.d(1m) - I/O wait time by file and process. Uses DTrace
iofileb.d(1m) - I/O bytes by file and process. Uses DTrace
iopattern(1m) - print disk I/O pattern. Uses DTrace
iopending(1m) - plot number of pending disk events. Uses DTrace
iosnoop(1m) - snoop I/O events as they occur. Uses DTrace
iotop(1m) - display top disk I/O events by process. Uses DTrace
kill.d(1m) - snoop process signals as they occur. Uses DTrace
lastwords(1m) - print syscalls before exit. Uses DTrace
loads.d(1m) - print load averages. Uses DTrace
newproc.d(1m) - snoop new processes. Uses DTrace
opensnoop(1m) - snoop file opens as they occur. Uses DTrace
pathopens.d(1m) - full pathnames opened ok count. Uses DTrace
pidpersec.d(1m) - print new PIDs per sec. Uses DTrace
plockstat(1) - front-end to DTrace to print statistics about POSIX mutexes and read/write locks
priclass.d(1m) - priority distribution by scheduling class. Uses DTrace
pridist.d(1m) - process priority distribution. Uses DTrace
procsystime(1m) - analyse system call times. Uses DTrace
runocc.d(1m) - run queue occupancy by CPU. Uses DTrace
rwbypid.d(1m) - read/write calls by PID. Uses DTrace
rwbytype.d(1m) - read/write bytes by vnode type. Uses DTrace
rwsnoop(1m) - snoop read/write events. Uses DTrace
sampleproc(1m) - sample processes on the CPUs. Uses DTrace
seeksize.d(1m) - print disk event seek report. Uses DTrace
setuids.d(1m) - snoop setuid calls as they occur. Uses DTrace
sigdist.d(1m) - signal distribution by process. Uses DTrace
syscallbypid.d(1m) - syscalls by process ID. Uses DTrace
syscallbyproc.d(1m) - syscalls by process name. Uses DTrace
syscallbysysc.d(1m) - syscalls by syscall. Uses DTrace
topsyscall(1m) - top syscalls by syscall name. Uses DTrace
topsysproc(1m) - top syscalls by process name. Uses DTrace
weblatency.d(1m) - website latency statistics. Uses DTrace