Commit | Line | Data |
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fc16a815 AB |
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 | #define BKT_WIDTH 5 | |
24 | #define MAX_BKT 19 | |
25 | #define EXCESS_BKT 20 | |
5683cbf6 | 26 | #define NBKTS (EXCESS_BKT + 1) |
fc16a815 AB |
27 | |
28 | struct hist_bkt { | |
29 | __u32 dev; | |
30 | int hist[NBKTS * sizeof(int)]; | |
31 | }; | |
32 | ||
c053af42 | 33 | void *unplug_hist_alloc(__u32 device) |
fc16a815 AB |
34 | { |
35 | struct hist_bkt *hbp; | |
36 | ||
37 | if (unplug_hist_name == NULL) return NULL; | |
38 | ||
39 | hbp = malloc(sizeof(*hbp)); | |
40 | hbp->dev = device; | |
41 | memset(hbp->hist, 0, NBKTS * sizeof(int)); | |
42 | ||
43 | return hbp; | |
44 | } | |
45 | ||
46 | void unplug_hist_add(struct io *u_iop) | |
47 | { | |
48 | struct d_info *dip; | |
49 | ||
fc16a815 | 50 | dip = __dip_find(u_iop->t.device); |
c053af42 | 51 | if (dip && dip->up_hist_handle) { |
fc16a815 | 52 | __u64 *val = u_iop->pdu; |
5406b971 | 53 | int idx, n_unplugs = be64_to_cpu(*val); |
c053af42 | 54 | struct hist_bkt *hbp = dip->up_hist_handle; |
5406b971 AB |
55 | |
56 | idx = (n_unplugs / BKT_WIDTH); | |
5683cbf6 | 57 | if (idx > EXCESS_BKT) |
5406b971 | 58 | idx = EXCESS_BKT; |
fc16a815 | 59 | |
fc16a815 AB |
60 | hbp->hist[idx]++; |
61 | } | |
62 | } | |
63 | ||
c053af42 | 64 | void unplug_hist_free(void *arg) |
fc16a815 AB |
65 | { |
66 | if (arg) { | |
67 | FILE *fp; | |
68 | struct hist_bkt *hbp = arg; | |
69 | int mjr = hbp->dev >> MINORBITS; | |
70 | int mnr = hbp->dev & ((1 << MINORBITS) - 1); | |
71 | char *oname = malloc(strlen(unplug_hist_name) + 32); | |
72 | ||
73 | sprintf(oname, "%s_%03d,%03d.dat", unplug_hist_name, mjr, mnr); | |
8f34184f | 74 | if ((fp = my_fopen(oname, "w")) != NULL) { |
fc16a815 AB |
75 | int i; |
76 | ||
77 | for (i = 0; i < NBKTS; i++) | |
78 | fprintf(fp, "%d %d\n", i, hbp->hist[i]); | |
79 | fclose(fp); | |
80 | ||
c053af42 | 81 | } else |
fc16a815 AB |
82 | perror(oname); |
83 | ||
84 | free(oname); | |
85 | free(hbp); | |
86 | } | |
87 | } |