The following is a demonstration of the topsyscall command,

Here topsyscall is run with no arguments,

# topsyscall

2005 Jun 13 22:13:21, load average: 1.24, 1.24, 1.22 syscalls: 1287

SYSCALL COUNT

getgid 4

getuid 5

waitsys 5

xstat 7

munmap 7

sysconfig 8

brk 8

setcontext 8

open 8

getpid 9

close 9

resolvepath 10

lwp_sigmask 22

mmap 26

lwp_park 43

read 59

write 72

sigaction 113

pollsys 294

ioctl 520

The screen updates every second, and continues until Ctrl-C is hit to

end the program.

In the above output we can see that the ioctl() system call occured 520 times,

pollsys() 294 times and sigaction() 113 times.

Here the command is run with a 10 second interval,

# topsyscall 10

2005 Jun 13 22:15:35, load average: 1.21, 1.22, 1.22 syscalls: 10189

SYSCALL COUNT

writev 6

close 7

lseek 7

open 7

brk 8

nanosleep 9

portfs 10

llseek 14

lwp_cond_wait 21

p_online 21

gtime 27

rusagesys 71

setcontext 92

lwp_sigmask 98

setitimer 183

lwp_park 375

write 438

read 551

pollsys 3071

ioctl 5144