1 /*
2 * blktrace output analysis: generate a timeline & gather statistics
3 *
4 * (C) Copyright 2008 Hewlett-Packard Development Company, L.P.
5 * Alan D. Brunelle <alan.brunelle@hp.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 *
21 */
22 #include "globals.h"
23
24 struct plat_info {
25 long nl;
26 FILE *fp;
27 double first_ts, last_ts, tl;
28 };
29
plat_alloc(char * str)30 void *plat_alloc(char *str)
31 {
32 char *oname;
33 struct plat_info *pp;
34
35 if (plat_freq <= 0.0) return NULL;
36
37 pp = malloc(sizeof(*pp));
38 pp->nl = 0;
39 pp->first_ts = pp->last_ts = pp->tl = -1.0;
40
41 oname = malloc(strlen(str) + 32);
42 sprintf(oname, "%s.dat", str);
43 if ((pp->fp = my_fopen(oname, "w")) == NULL) {
44 perror(oname);
45 return NULL;
46 }
47 add_file(pp->fp, oname);
48
49 return pp;
50 }
51
plat_free(void * info)52 void plat_free(void *info)
53 {
54 struct plat_info *pp = info;
55
56 if (pp == NULL) return;
57
58 if (pp->first_ts != -1.0) {
59 double delta = pp->last_ts - pp->first_ts;
60
61 fprintf(pp->fp, "%lf %lf\n",
62 pp->first_ts + (delta / 2), pp->tl / pp->nl);
63 }
64 free(info);
65 }
66
plat_x2c(void * info,__u64 ts,__u64 latency)67 void plat_x2c(void *info, __u64 ts, __u64 latency)
68 {
69 double now = TO_SEC(ts);
70 double lat = TO_SEC(latency);
71 struct plat_info *pp = info;
72
73 if (pp == NULL) return;
74
75 if (pp->first_ts == -1.0) {
76 pp->first_ts = pp->last_ts = now;
77 pp->nl = 1;
78 pp->tl = lat;
79 } else if ((now - pp->first_ts) >= plat_freq) {
80 double delta = pp->last_ts - pp->first_ts;
81
82 fprintf(pp->fp, "%lf %lf\n",
83 pp->first_ts + (delta / 2), pp->tl / pp->nl);
84
85 pp->first_ts = pp->last_ts = now;
86 pp->nl = 1;
87 pp->tl = lat;
88 } else {
89 pp->last_ts = now;
90 pp->nl += 1;
91 pp->tl += lat;
92 }
93 }
94