| 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 |
| 26 | #define NBKTS (EXCESS_BKT + 1) |
| 27 | |
| 28 | struct hist_bkt { |
| 29 | struct d_info *dip; |
| 30 | int hist[NBKTS * sizeof(int)]; |
| 31 | }; |
| 32 | |
| 33 | void *unplug_hist_alloc(struct d_info *dip) |
| 34 | { |
| 35 | struct hist_bkt *hbp; |
| 36 | |
| 37 | if (unplug_hist_name == NULL) return NULL; |
| 38 | |
| 39 | hbp = malloc(sizeof(*hbp)); |
| 40 | hbp->dip = dip; |
| 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 | |
| 50 | dip = __dip_find(u_iop->t.device); |
| 51 | if (dip && dip->up_hist_handle) { |
| 52 | __u64 *val = u_iop->pdu; |
| 53 | int idx, n_unplugs = be64_to_cpu(*val); |
| 54 | struct hist_bkt *hbp = dip->up_hist_handle; |
| 55 | |
| 56 | idx = (n_unplugs / BKT_WIDTH); |
| 57 | if (idx > EXCESS_BKT) |
| 58 | idx = EXCESS_BKT; |
| 59 | |
| 60 | hbp->hist[idx]++; |
| 61 | } |
| 62 | } |
| 63 | |
| 64 | void unplug_hist_free(void *arg) |
| 65 | { |
| 66 | if (arg) { |
| 67 | FILE *fp; |
| 68 | struct hist_bkt *hbp = arg; |
| 69 | size_t tlen = strlen(unplug_hist_name) |
| 70 | + strlen(hbp->dip->dip_name) + 32; |
| 71 | char *oname = malloc(tlen); |
| 72 | |
| 73 | sprintf(oname, "%s_%s.dat", unplug_hist_name, |
| 74 | hbp->dip->dip_name); |
| 75 | if ((fp = my_fopen(oname, "w")) != NULL) { |
| 76 | int i; |
| 77 | |
| 78 | for (i = 0; i < NBKTS; i++) |
| 79 | fprintf(fp, "%d %d\n", i, hbp->hist[i]); |
| 80 | fclose(fp); |
| 81 | |
| 82 | } else |
| 83 | perror(oname); |
| 84 | |
| 85 | free(oname); |
| 86 | free(hbp); |
| 87 | } |
| 88 | } |