rusage

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          rusage() - reports information gathered by the getrusage()
          system call

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          mapping rusage( void );

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          This efun collects information gathered via the getrusage()
          system call.  Read the getrusage() man page for more
          information on what information will be collected.  Some
          systems do not have the getrusage() system call but do have
          the times() system call.  On those systems, only "utime" and
          "stime" will be available.  Times are reported in
          milliseconds.

          Here is an example usage of rusage():

            void
            create()
            {
                mapping info;

                info = rusage();
                write("user time = " + info["utime"] + "ms\n");
                write("system time = " + info["stime"] + "ms\n");
            }

          The available fields are:

               utime, stime, maxrss, ixrss, idrss, isrss, minflt,
               majflt, nswap, inblock, oublock, msgsnd, msgrcv,
               nsignals, nvcsw, nivcsw.

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          time_expression(3), function_profile(3), time(3), uptime(3)

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