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