btt/bt_timeline.c

   1 /*
   2  * blktrace output analysis: generate a timeline & gather statistics
   3  *
   4  * Copyright (C) 2006 Alan D. Brunelle <Alan.Brunelle@hp.com>
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  */
  21 #include <stdio.h>
  22 #include <string.h>
  23 #include <unistd.h>
  24 #include <sys/time.h>
  25 #include <time.h>
  26 #include "globals.h"
  27
  28 char bt_timeline_version[] = "2.08";
  29
  30 char *devices, *exes, *input_name, *output_name, *seek_name, *bno_dump_name;
  31 char *d2c_name, *q2c_name, *per_io_name, *unplug_hist_name;
  32 char *sps_name, *aqd_name, *q2d_name, *per_io_trees;
  33 FILE *rngs_ofp, *avgs_ofp, *xavgs_ofp, *per_io_ofp, *msgs_ofp;
  34 int verbose, done, time_bounded, output_all_data, seek_absolute;
  35 int easy_parse_avgs, ignore_remaps;
  36 double t_astart, t_aend, last_t_seen;
  37 unsigned long n_traces;
  38 struct avgs_info all_avgs;
  39 unsigned int n_devs;
  40 time_t genesis, last_vtrace;
  41 LIST_HEAD(all_devs);
  42 LIST_HEAD(all_procs);
  43 LIST_HEAD(all_ios);
  44 LIST_HEAD(free_ios);
  45 LIST_HEAD(free_bilinks);
  46 __u64 q_histo[N_HIST_BKTS], d_histo[N_HIST_BKTS];
  47
  48 double plat_freq = 0.0;
  49 double range_delta = 0.1;
  50 __u64 last_q = (__u64)-1;
  51
  52 struct region_info all_regions = {
  53         .qranges = LIST_HEAD_INIT(all_regions.qranges),
  54         .cranges = LIST_HEAD_INIT(all_regions.cranges),
  55 };
  56
  57 int process(void);
  58
  59 int main(int argc, char *argv[])
  60 {
  61         handle_args(argc, argv);
  62
  63         init_dev_heads();
  64         iostat_init();
  65         if (!rstat_init())
  66                 return 1;
  67
  68         if (process() || output_avgs(avgs_ofp) || output_ranges(rngs_ofp))
  69                 return 1;
  70
  71         if (iostat_ofp) {
  72                 fprintf(iostat_ofp, "\n");
  73                 iostat_dump_stats(iostat_last_stamp, 1);
  74         }
  75
  76         if (msgs_ofp != stdout)
  77                 fclose(msgs_ofp);
  78         if (rngs_ofp != stdout)
  79                 fclose(rngs_ofp);
  80         if (avgs_ofp != stdout)
  81                 fclose(avgs_ofp);
  82         if (xavgs_ofp)
  83                 fclose(xavgs_ofp);
  84
  85         dip_cleanup();
  86         dev_map_exit();
  87         dip_exit();
  88         rstat_exit();
  89         pip_exit();
  90         io_free_all();
  91         region_exit(&all_regions);
  92         clean_allocs();
  93
  94         return 0;
  95 }
  96
  97 static inline double tv2dbl(struct timeval *tv)
  98 {
  99         return (double)tv->tv_sec + (((double)tv->tv_usec) / (1000.0 * 1000.0));
 100 }
 101
 102 int process(void)
 103 {
 104         int ret = 0;
 105         struct io *iop = io_alloc();
 106         struct timeval tvs, tve;
 107
 108         genesis = last_vtrace = time(NULL);
 109         gettimeofday(&tvs, NULL);
 110         while (!done && next_trace(&iop->t, &iop->pdu)) {
 111                 add_trace(iop);
 112                 iop = io_alloc();
 113         }
 114
 115         io_release(iop);
 116         gettimeofday(&tve, NULL);
 117
 118         if (verbose) {
 119                 double tps, dt_input = tv2dbl(&tve) - tv2dbl(&tvs);
 120
 121                 tps = (double)n_traces / dt_input;
 122                 printf("\r                                        "
 123                        "                                        \r");
 124                 printf("%10lu traces @ %.1lf Ktps in %.6lf seconds\n",
 125                         n_traces, tps/1000.0,
 126                         dt_input);
 127         }
 128
 129         return ret;
 130 }