Merge branch 'master' of ssh://git.kernel.dk/data/git/blktrace
[blktrace.git] / 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[] = "0.99";
29
30 char *devices, *exes, *input_name, *output_name, *seek_name;
31 char *d2c_name, *q2c_name, *per_io_name;
32 FILE *ranges_ofp, *avgs_ofp, *per_io_ofp;
33 int verbose, done, time_bounded;
34 double t_astart, t_aend;
35 unsigned long n_traces;
36 struct avgs_info all_avgs;
37 unsigned int n_devs;
38 time_t genesis, last_vtrace;
39 LIST_HEAD(all_devs);
40 LIST_HEAD(all_procs);
41 LIST_HEAD(free_ios);
42
43 double range_delta = 0.1;
44 __u64 last_q = (__u64)-1;
45 __u64 next_retry_check = 0;
46
47 struct region_info all_regions = {
48         .qranges = LIST_HEAD_INIT(all_regions.qranges),
49         .cranges = LIST_HEAD_INIT(all_regions.cranges),
50         .qr_cur = NULL,
51         .cr_cur = NULL
52 };
53
54 #if defined(DEBUG)
55 int rb_tree_size;
56 #endif
57
58 int process(void);
59
60 int main(int argc, char *argv[])
61 {
62         handle_args(argc, argv);
63
64         init_dev_heads();
65         iostat_init();
66         if (process() || output_avgs(avgs_ofp) || output_ranges(ranges_ofp))
67                 return 1;
68
69         return 0;
70 }
71
72 static inline double tv2dbl(struct timeval *tv)
73 {
74         return (double)tv->tv_sec + (((double)tv->tv_usec) / (1000.0 * 1000.0));
75 }
76
77 int process(void)
78 {
79         int ret = 0;
80         struct io *iop = io_alloc();
81         struct timeval tvs, tvi, tve;
82
83         genesis = last_vtrace = time(NULL);
84         gettimeofday(&tvs, NULL);
85         while (!done && next_trace(&iop->t, &iop->pdu)) {
86                 add_trace(iop);
87                 iop = io_alloc();
88         }
89
90         io_release(iop);
91         do_retries(0);
92
93         gettimeofday(&tvi, NULL);
94
95         if (iostat_ofp) {
96                 fprintf(iostat_ofp, "\n");
97                 iostat_dump_stats(iostat_last_stamp, 1);
98         }
99
100         seek_clean();
101         latency_clean();
102         gettimeofday(&tve, NULL);
103
104         if (verbose) {
105                 double tps, dt_input = tv2dbl(&tvi) - tv2dbl(&tvs);
106                 
107                 tps = (double)n_traces / dt_input;
108                 printf("%10lu traces @ %.1lf Ktps\t%.6lf+%.6lf=%.6lf\n", 
109                         n_traces, tps/1000.0,
110                         dt_input, tv2dbl(&tve) - tv2dbl(&tvi),
111                         tv2dbl(&tve) - tv2dbl(&tvs));
112 #if defined(DEBUG)
113                 printf("\ttree = |%d|\n", rb_tree_size);
114                 if (rb_tree_size > 0)
115                         dump_rb_trees();
116 #endif
117         }
118
119         return ret;
120 }