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 "globals.h"
22
23 struct bno_dump {
24 FILE *rfp, *wfp, *cfp;
25 };
26
bno_dump_open(__u32 device,char rwc)27 static FILE *bno_dump_open(__u32 device, char rwc)
28 {
29 FILE *fp;
30 char *oname;
31 int mjr, mnr;
32
33 mjr = device >> MINORBITS;
34 mnr = device & ((1 << MINORBITS) - 1);
35
36 oname = malloc(strlen(bno_dump_name) + 32);
37 sprintf(oname, "%s_%03d,%03d_%c.dat", bno_dump_name, mjr, mnr, rwc);
38 if ((fp = my_fopen(oname, "w")) == NULL)
39 perror(oname);
40 else
41 add_file(fp, oname);
42 return fp;
43 }
44
bno_dump_write(FILE * fp,struct io * iop)45 static inline void bno_dump_write(FILE *fp, struct io *iop)
46 {
47 fprintf(fp, "%15.9lf %lld %lld\n", BIT_TIME(iop->t.time),
48 (long long)BIT_START(iop), (long long)BIT_END(iop));
49 }
50
bno_dump_alloc(__u32 device)51 void *bno_dump_alloc(__u32 device)
52 {
53 struct bno_dump *bdp;
54
55 if (bno_dump_name == NULL) return NULL;
56
57 bdp = malloc(sizeof(*bdp));
58 bdp->rfp = bno_dump_open(device, 'r');
59 bdp->wfp = bno_dump_open(device, 'w');
60 bdp->cfp = bno_dump_open(device, 'c');
61
62 return bdp;
63 }
64
bno_dump_free(void * param)65 void bno_dump_free(void *param)
66 {
67 free(param);
68 }
69
bno_dump_add(void * handle,struct io * iop)70 void bno_dump_add(void *handle, struct io *iop)
71 {
72 struct bno_dump *bdp = handle;
73
74 if (bdp) {
75 FILE *fp = IOP_READ(iop) ? bdp->rfp : bdp->wfp;
76
77 if (fp)
78 bno_dump_write(fp, iop);
79 if (bdp->cfp)
80 bno_dump_write(bdp->cfp, iop);
81 }
82 }
83