bt_timeline.c revision e20e1347b9914aa05e30548c15d7cd5e412cc0e2 
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
28char bt_timeline_version[] = "2.08";
29
30char *devices, *exes, *input_name, *output_name, *seek_name, *bno_dump_name;
31char *d2c_name, *q2c_name, *per_io_name, *unplug_hist_name;
32char *sps_name, *aqd_name, *q2d_name, *per_io_trees;
33FILE *rngs_ofp, *avgs_ofp, *xavgs_ofp, *per_io_ofp, *msgs_ofp;
34int verbose, done, time_bounded, output_all_data, seek_absolute;
35int easy_parse_avgs, ignore_remaps;
36double t_astart, t_aend;
37unsigned long n_traces;
38struct avgs_info all_avgs;
39unsigned int n_devs;
40time_t genesis, last_vtrace;
41LIST_HEAD(all_devs);
42LIST_HEAD(all_procs);
43LIST_HEAD(all_ios);
44LIST_HEAD(free_ios);
45LIST_HEAD(free_bilinks);
46__u64 q_histo[N_HIST_BKTS], d_histo[N_HIST_BKTS];
47
48double plat_freq = 0.0;
49double range_delta = 0.1;
50__u64 last_q = (__u64)-1;
51
52struct region_info all_regions = {
53	.qranges = LIST_HEAD_INIT(all_regions.qranges),
54	.cranges = LIST_HEAD_INIT(all_regions.cranges),
55};
56
57int process(void);
58
59int 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
93static inline double tv2dbl(struct timeval *tv)
94{
95	return (double)tv->tv_sec + (((double)tv->tv_usec) / (1000.0 * 1000.0));
96}
97
98int 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