drivers/staging/ktap/scripts/syscalls/syscalls_count.kp


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#!/usr/bin/env ktap

s = aggr_table()

trace syscalls:sys_enter_* {
	s[argname] = count()
}

trace_end {
	histogram(s)
}

print("Press Control-C to stop.")

#Result:
#
#[root@jovi ktap]# ./ktap scripts/syscalls_histogram.kp
#^C
#                          value ------------- Distribution ------------- count
#        sys_enter_rt_sigprocmask |@@@@@@                                 326
#                  sys_enter_read |@@@@@                                  287
#                 sys_enter_close |@@@@                                   236
#                  sys_enter_open |@@@@                                   222
#                sys_enter_stat64 |@@                                     132
#                sys_enter_select |@@                                     123
#          sys_enter_rt_sigaction |@@                                     107
#                  sys_enter_poll |@                                      72
#                 sys_enter_write |@                                      70
#            sys_enter_mmap_pgoff |@                                      58
#               sys_enter_fstat64 |                                       41
#             sys_enter_nanosleep |                                       23
#                sys_enter_access |                                       20
#              sys_enter_mprotect |                                       18
#               sys_enter_geteuid |                                       17
#               sys_enter_getegid |                                       16
#                sys_enter_getuid |                                       16
#                sys_enter_getgid |                                       16
#                   sys_enter_brk |                                       15
#               sys_enter_waitpid |                                       11
#                  sys_enter_time |                                       10
#                 sys_enter_ioctl |                                       9
#                sys_enter_munmap |                                       9
#               sys_enter_fcntl64 |                                       7
#                  sys_enter_dup2 |                                       7
#                 sys_enter_clone |                                       6
#            sys_enter_exit_group |                                       6
#                sys_enter_execve |                                       4
#                  sys_enter_pipe |                                       3
#          sys_enter_gettimeofday |                                       3
#              sys_enter_getdents |                                       2
#             sys_enter_getgroups |                                       2
#              sys_enter_statfs64 |                                       2
#                 sys_enter_lseek |                                       2
#                sys_enter_openat |                                       1
#              sys_enter_newuname |                                       1