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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 "globals.h" | |
22 | ||
23 | static struct file_info *all_files = NULL; | |
24 | ||
25 | static inline void latency_out(FILE *ofp, __u64 tstamp, __u64 latency) | |
26 | { | |
27 | if (ofp) | |
28 | fprintf(ofp, "%lf %lf\n", TO_SEC(tstamp), TO_SEC(latency)); | |
29 | } | |
30 | ||
31 | FILE *latency_open(__u32 device, char *name, char *post) | |
32 | { | |
33 | FILE *fp; | |
34 | char *oname; | |
35 | int mjr, mnr; | |
36 | ||
37 | if (name == NULL) return NULL; | |
38 | ||
39 | mjr = device >> MINORBITS; | |
40 | mnr = device & ((1 << MINORBITS) - 1); | |
41 | ||
42 | oname = malloc(strlen(name)+32); | |
43 | sprintf(oname, "%s_%03d,%03d_%s.dat", name, mjr, mnr, post); | |
44 | if ((fp = fopen(oname, "w")) == NULL) | |
45 | perror(oname); | |
46 | else | |
47 | add_file(&all_files, fp, oname); | |
48 | ||
49 | return fp; | |
50 | } | |
51 | ||
52 | void latency_init(struct d_info *dip) | |
53 | { | |
54 | dip->d2c_ofp = latency_open(dip->device, d2c_name, "d2c"); | |
55 | dip->q2c_ofp = latency_open(dip->device, q2c_name, "q2c"); | |
56 | } | |
57 | ||
58 | void latency_clean(void) | |
59 | { | |
60 | clean_files(&all_files); | |
61 | } | |
62 | ||
63 | void latency_d2c(struct d_info *dip, __u64 tstamp, __u64 latency) | |
64 | { | |
65 | latency_out(dip->d2c_ofp, tstamp, latency); | |
66 | } | |
67 | ||
68 | void latency_q2c(struct d_info *dip, __u64 tstamp, __u64 latency) | |
69 | { | |
70 | latency_out(dip->q2c_ofp, tstamp, latency); | |
71 | } |