San Mehat | e20e134 | 2009-06-03 15:36:35 -0700 | [diff] [blame] | 1 | /* |
| 2 | * blktrace output analysis: generate a timeline & gather statistics |
| 3 | * |
| 4 | * (C) Copyright 2008 Hewlett-Packard Development Company, L.P. |
| 5 | * Alan D. Brunelle <alan.brunelle@hp.com> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 20 | * |
| 21 | */ |
| 22 | #include "globals.h" |
| 23 | |
| 24 | struct plat_info { |
| 25 | long nl; |
| 26 | FILE *fp; |
| 27 | double first_ts, last_ts, tl; |
| 28 | }; |
| 29 | |
| 30 | void *plat_alloc(char *str) |
| 31 | { |
| 32 | char *oname; |
| 33 | struct plat_info *pp; |
| 34 | |
| 35 | if (plat_freq <= 0.0) return NULL; |
| 36 | |
| 37 | pp = malloc(sizeof(*pp)); |
| 38 | pp->nl = 0; |
| 39 | pp->first_ts = pp->last_ts = pp->tl = -1.0; |
| 40 | |
| 41 | oname = malloc(strlen(str) + 32); |
| 42 | sprintf(oname, "%s.dat", str); |
| 43 | if ((pp->fp = my_fopen(oname, "w")) == NULL) { |
| 44 | perror(oname); |
| 45 | return NULL; |
| 46 | } |
| 47 | add_file(pp->fp, oname); |
| 48 | |
| 49 | return pp; |
| 50 | } |
| 51 | |
| 52 | void plat_free(void *info) |
| 53 | { |
| 54 | struct plat_info *pp = info; |
| 55 | |
| 56 | if (pp == NULL) return; |
| 57 | |
| 58 | if (pp->first_ts != -1.0) { |
| 59 | double delta = pp->last_ts - pp->first_ts; |
| 60 | |
| 61 | fprintf(pp->fp, "%lf %lf\n", |
| 62 | pp->first_ts + (delta / 2), pp->tl / pp->nl); |
| 63 | } |
| 64 | free(info); |
| 65 | } |
| 66 | |
| 67 | void plat_x2c(void *info, __u64 ts, __u64 latency) |
| 68 | { |
| 69 | double now = TO_SEC(ts); |
| 70 | double lat = TO_SEC(latency); |
| 71 | struct plat_info *pp = info; |
| 72 | |
| 73 | if (pp == NULL) return; |
| 74 | |
| 75 | if (pp->first_ts == -1.0) { |
| 76 | pp->first_ts = pp->last_ts = now; |
| 77 | pp->nl = 1; |
| 78 | pp->tl = lat; |
| 79 | } else if ((now - pp->first_ts) >= plat_freq) { |
| 80 | double delta = pp->last_ts - pp->first_ts; |
| 81 | |
| 82 | fprintf(pp->fp, "%lf %lf\n", |
| 83 | pp->first_ts + (delta / 2), pp->tl / pp->nl); |
| 84 | |
| 85 | pp->first_ts = pp->last_ts = now; |
| 86 | pp->nl = 1; |
| 87 | pp->tl = lat; |
| 88 | } else { |
| 89 | pp->last_ts = now; |
| 90 | pp->nl += 1; |
| 91 | pp->tl += lat; |
| 92 | } |
| 93 | } |