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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;
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 
main(int argc,char * argv[])59 int main(int argc, char *argv[])
60 {
61 	handle_args(argc, argv);
62 
63 	init_dev_heads();
64 	iostat_init();
65 	if (process() || output_avgs(avgs_ofp) || output_ranges(rngs_ofp))
66 		return 1;
67 
68 	if (iostat_ofp) {
69 		fprintf(iostat_ofp, "\n");
70 		iostat_dump_stats(iostat_last_stamp, 1);
71 	}
72 
73 	if (msgs_ofp != stdout)
74 		fclose(msgs_ofp);
75 	if (rngs_ofp != stdout)
76 		fclose(rngs_ofp);
77 	if (avgs_ofp != stdout)
78 		fclose(avgs_ofp);
79 	if (xavgs_ofp)
80 		fclose(xavgs_ofp);
81 
82 	dip_cleanup();
83 	dev_map_exit();
84 	dip_exit();
85 	pip_exit();
86 	io_free_all();
87 	region_exit(&all_regions);
88 	clean_allocs();
89 
90 	return 0;
91 }
92 
tv2dbl(struct timeval * tv)93 static inline double tv2dbl(struct timeval *tv)
94 {
95 	return (double)tv->tv_sec + (((double)tv->tv_usec) / (1000.0 * 1000.0));
96 }
97 
process(void)98 int process(void)
99 {
100 	int ret = 0;
101 	struct io *iop = io_alloc();
102 	struct timeval tvs, tve;
103 
104 	genesis = last_vtrace = time(NULL);
105 	gettimeofday(&tvs, NULL);
106 	while (!done && next_trace(&iop->t, &iop->pdu)) {
107 		add_trace(iop);
108 		iop = io_alloc();
109 	}
110 
111 	io_release(iop);
112 	gettimeofday(&tve, NULL);
113 
114 	if (verbose) {
115 		double tps, dt_input = tv2dbl(&tve) - tv2dbl(&tvs);
116 
117 		tps = (double)n_traces / dt_input;
118 		printf("\r                                        "
119 		       "                                        \r");
120 		printf("%10lu traces @ %.1lf Ktps in %.6lf seconds\n",
121 			n_traces, tps/1000.0,
122 			dt_input);
123 	}
124 
125 	return ret;
126 }
127