io/getrusage.c

   1 /*
   2  * Copyright (c) 2005 Silicon Graphics, Inc.
   3  * All Rights Reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it would be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write the Free Software Foundation,
  16  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  */
  18
  19 #include "command.h"
  20 #include "input.h"
  21 #include <sys/time.h>
  22 #include <sys/resource.h>
  23 #include "init.h"
  24
  25 static cmdinfo_t getrusage_cmd;
  26
  27 /*
  28  * Report process resource utilisation.  Formatting options:
  29  * "Shell" format: 0.000u 0.000s 0:00.00 0.0%      0+0k 0+0io 0pf+0w
  30  * Verbose format:
  31  * 0.00user 0.00system 0:00.00elapsed 0%CPU (0avgtext+0avgdata 0maxresident)k
  32  * 0inputs+0outputs (0major+0minor)pagefaults 0swaps
  33  * Comma Separated Value format: 0.000,0.000,00:00:00.00,0.0,0,0,0,0,0,0
  34  */
  35 static int
  36 getrusage_f(
  37         int             argc,
  38         char            **argv)
  39 {
  40         struct timeval  wallclk, timenow;
  41         struct rusage   rusage;
  42         double          usrtime, systime, elapsed, pct_cpu;
  43         char            ts[64];
  44         int             Cflag, vflag;
  45         int             c;
  46
  47         Cflag = vflag = 0;
  48         while ((c = getopt(argc, argv, "Cv")) != EOF) {
  49                 switch (c) {
  50                 case 'C':
  51                         Cflag = 1;
  52                         break;
  53                 case 'v':
  54                         vflag = 1;
  55                         break;
  56                 default:
  57                         return command_usage(&getrusage_cmd);
  58                 }
  59         }
  60         if (optind != argc)
  61                 return command_usage(&getrusage_cmd);
  62
  63         if (getrusage(RUSAGE_SELF, &rusage) < 0) {
  64                 perror("getrusage");
  65                 return 0;
  66         }
  67
  68         gettimeofday(&timenow, NULL);
  69         wallclk = tsub(timenow, stopwatch);
  70         elapsed = (double)wallclk.tv_sec +
  71                   ((double)wallclk.tv_usec / 1000000.0);
  72         usrtime = (double)rusage.ru_utime.tv_sec +
  73                   ((double)rusage.ru_utime.tv_usec / 1000000.0);
  74         systime = (double)rusage.ru_stime.tv_sec +
  75                   ((double)rusage.ru_stime.tv_usec / 1000000.0);
  76         if (elapsed < usrtime + systime)
  77                 pct_cpu = 100.0;
  78         else
  79                 pct_cpu = ((usrtime + systime) / elapsed) * 100;
  80         c = Cflag ? VERBOSE_FIXED_TIME : TERSE_FIXED_TIME;
  81         timestr(&wallclk, ts, sizeof(ts), c);
  82
  83         if (Cflag)
  84                 printf("%.3f,%.3f,%s,%.1f,%ld,%ld,%ld,%ld,%ld,%ld,%ld\n",
  85                         usrtime, systime, ts, pct_cpu,
  86                         rusage.ru_majflt, rusage.ru_minflt, rusage.ru_nswap,
  87                         rusage.ru_inblock, rusage.ru_oublock,
  88                         rusage.ru_nvcsw, rusage.ru_nivcsw);
  89         else if (vflag)
  90                 printf("%.2fuser %.2fsystem %selapsed %.0f%%CPU "
  91                        "(%ldavgtext+%ldavgdata %ldmaxresident)k\n"
  92                        "%ldinputs+%ldoutputs "
  93                         "(%ldmajor+%ldminor)pagefaults %ldswaps\n",
  94                         usrtime, systime, ts, pct_cpu,
  95                         rusage.ru_ixrss, rusage.ru_idrss, rusage.ru_maxrss,
  96                         rusage.ru_inblock, rusage.ru_oublock,
  97                         rusage.ru_majflt, rusage.ru_minflt, rusage.ru_nswap);
  98         else
  99                 printf("%.3fu %.3fs %s %.1f%%\t"
 100                        "%ld+%ldk %ld+%ldio %ldpf+%ldw\n",
 101                         usrtime, systime, ts, pct_cpu,
 102                         rusage.ru_maxrss, rusage.ru_ixrss,
 103                         rusage.ru_inblock, rusage.ru_oublock,
 104                         rusage.ru_majflt, rusage.ru_nswap);
 105         return 0;
 106 }
 107
 108 void
 109 getrusage_init(void)
 110 {
 111         getrusage_cmd.name = "getrusage";
 112         getrusage_cmd.altname = "g";
 113         getrusage_cmd.argmin = 0;
 114         getrusage_cmd.argmax = -1;
 115         getrusage_cmd.cfunc = getrusage_f;
 116         getrusage_cmd.flags = CMD_NOFILE_OK | CMD_NOMAP_OK | CMD_FOREIGN_OK;
 117         getrusage_cmd.oneline = _("report process resource usage");
 118
 119         if (expert)
 120                 add_command(&getrusage_cmd);
 121 }