The following is a demonstration of the syscallbysysc.d script,
# syscallbysysc.d
dtrace: description 'syscall:::entry ' matched 228 probes
^C
fstat 1
setcontext 1
lwp_park 1
schedctl 1
mmap 1
sigaction 2
pset 2
lwp_sigmask 2
gtime 3
sysconfig 3
write 4
brk 6
pollsys 7
p_online 558
ioctl 579
In the above output, the ioctl system call was the most common, occuring
579 times.