LinuxGuruz
  • Last 5 Forum Topics
    Replies
    Views
    Last post


The Web Only This Site
  • BOOKMARK

  • ADD TO FAVORITES

  • REFERENCES


  • MARC

    Mailing list ARChives
    - Search by -
     Subjects
     Authors
     Bodies





    FOLDOC

    Computing Dictionary




  • Text Link Ads






  • LINUX man pages
  • Linux Man Page Viewer


    The following form allows you to view linux man pages.

    Command:

    clock_getcpuclockid

    
    
    

    SYNOPSIS

           #include <time.h>
    
           int clock_getcpuclockid(pid_t pid, clockid_t *clock_id);
    
           Link with -lrt (only for glibc versions before 2.17).
    
       Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
    
           clock_getcpuclockid():
               _XOPEN_SOURCE >= 600 || _POSIX_C_SOURCE >= 200112L
    
    
    

    DESCRIPTION

           The clock_getcpuclockid() function obtains the ID of the CPU-time clock
           of the process whose ID is pid, and returns it in the location  pointed
           to  by  clock_id.   If  pid  is zero, then the clock ID of the CPU-time
           clock of the calling process is returned.
    
    
    

    RETURN VALUE

           On success, clock_getcpuclockid() returns 0; on error, it  returns  one
           of the positive error numbers listed in ERRORS.
    
    
    

    ERRORS

           ENOSYS The  kernel  does not support obtaining the per-process CPU-time
                  clock of another process, and pid does not specify  the  calling
                  process.
    
           EPERM  The caller does not have permission to access the CPU-time clock
                  of the process specified by  pid.   (Specified  as  an  optional
                  error in POSIX.1-2001; does not occur on Linux unless the kernel
                  does not support obtaining the  per-process  CPU-time  clock  of
                  another process.)
    
           ESRCH  There is no process with the ID pid.
    
    
    

    VERSIONS

           The  clock_getcpuclockid() function is available in glibc since version
           2.2.
    
    
    

    ATTRIBUTES

       Multithreading (see pthreads(7))
           The clock_getcpuclockid() function is thread-safe.
    
    
    

    CONFORMING TO

           POSIX.1-2001.
    
    
    

    NOTES

           Calling clock_gettime(2) with the  clock  ID  obtained  by  a  call  to
           clock_getcpuclockid()  with  a pid of 0, is the same as using the clock
           ID CLOCK_PROCESS_CPUTIME_ID.
    
    
    

    EXAMPLE

    
           int
           main(int argc, char *argv[])
           {
               clockid_t clockid;
               struct timespec ts;
    
               if (argc != 2) {
                   fprintf(stderr, "%s <process-ID>\n", argv[0]);
                   exit(EXIT_FAILURE);
               }
    
               if (clock_getcpuclockid(atoi(argv[1]), &clockid) != 0) {
                   perror("clock_getcpuclockid");
                   exit(EXIT_FAILURE);
               }
    
               if (clock_gettime(clockid, &ts) == -1) {
                   perror("clock_gettime");
                   exit(EXIT_FAILURE);
               }
    
               printf("CPU-time clock for PID %s is %ld.%09ld seconds\n",
                       argv[1], (long) ts.tv_sec, (long) ts.tv_nsec);
               exit(EXIT_SUCCESS);
           }
    
    
    

    SEE ALSO

           clock_getres(2), timer_create(2), pthread_getcpuclockid(3), time(7)
    
    
    

    Linux 2013-07-04 CLOCK_GETCPUCLOCKID(3)

    
    
  • MORE RESOURCE


  • Linux

    The Distributions





    Linux

    The Software





    Linux

    The News



  • MARKETING






  • Toll Free

webmaster@linuxguruz.com
Copyright © 1999 - 2016 by LinuxGuruz