topsyscall - top syscalls by syscall name. Uses DTrace. topsyscall [-Cs] [interval [count]] This program continually prints a report of the top system calls, and refreshes the display every 1 second or as specified at the command line. Since this uses DTrace, only the root user or users with the dtrace_kernel privilege can run this command. Solaris unstable - uses the hp_avenrun kernel symbol.

-C don't clear the screen

-s print per second values

Default output, 1 second updates, # topsyscall

Print every 5 seconds, # topsyscall 5

Print a scrolling output, # topsyscall -C

load avg load averages, see uptime(1)

syscalls total syscalls in this interval

syscalls/s syscalls per second

SYSCALL system call name

COUNT total syscalls in this interval

COUNT/s syscalls per second

See the DTraceToolkit for further documentation under the Docs directory. The DTraceToolkit docs may include full worked examples with verbose descriptions explaining the output. topsyscall will run until Ctrl-C is hit, or the specified interval is reached. Brendan Gregg [Sydney, Australia] dtrace(1M), prstat(1M)