2 * blktrace output analysis: generate a timeline & gather statistics
4 * Copyright (C) 2006 Alan D. Brunelle <Alan.Brunelle@hp.com>
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.
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.
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
24 FILE *rfp, *wfp, *cfp;
27 static struct file_info *bno_dump_files = NULL;
29 static FILE *bno_dump_open(__u32 device, char rwc)
35 mjr = device >> MINORBITS;
36 mnr = device & ((1 << MINORBITS) - 1);
38 oname = malloc(strlen(bno_dump_name) + 32);
39 sprintf(oname, "%s_%03d,%03d_%c.dat", bno_dump_name, mjr, mnr, rwc);
40 if ((fp = fopen(oname, "w")) == NULL)
43 add_file(&bno_dump_files, fp, oname);
47 void *bno_dump_init(__u32 device)
51 if (bno_dump_name == NULL) return NULL;
53 bdp = malloc(sizeof(*bdp));
54 bdp->rfp = bno_dump_open(device, 'r');
55 bdp->wfp = bno_dump_open(device, 'w');
56 bdp->cfp = bno_dump_open(device, 'c');
61 void bno_dump_exit(void *param)
64 * Associated files will be auto-cleaned by bno_dump_clean
69 static inline void bno_dump_write(FILE *fp, struct io *iop)
71 fprintf(fp, "%15.9lf %lld %lld\n",
72 BIT_TIME(iop->t.time),
73 (long long)BIT_START(iop), (long long)BIT_END(iop));
76 void bno_dump_add(void *handle, struct io *iop)
78 # define RW_FP(bdp, iop) (IOP_READ(iop) ? bdp->rfp : bdp->wfp)
79 struct bno_dump *bdp = handle;
83 bno_dump_write(RW_FP(bdp, iop), iop);
85 bno_dump_write(bdp->cfp, iop);
89 void bno_dump_clean(void)
91 clean_files(&bno_dump_files);