Mike Dodd | 8cfa702 | 2010-11-17 11:12:26 -0800 | [diff] [blame^] | 1 | /** |
| 2 | * @file opd_sample_files.c |
| 3 | * Management of sample files |
| 4 | * |
| 5 | * @remark Copyright 2002 OProfile authors |
| 6 | * @remark Read the file COPYING |
| 7 | * |
| 8 | * @author John Levon |
| 9 | * @author Philippe Elie |
| 10 | */ |
| 11 | |
| 12 | #include <sys/types.h> |
| 13 | |
| 14 | #include "opd_sample_files.h" |
| 15 | #include "opd_image.h" |
| 16 | #include "opd_printf.h" |
| 17 | #include "opd_events.h" |
| 18 | #include "oprofiled.h" |
| 19 | |
| 20 | #include "op_sample_file.h" |
| 21 | #include "op_file.h" |
| 22 | #include "op_config.h" |
| 23 | #include "op_mangle.h" |
| 24 | #include "op_events.h" |
| 25 | |
| 26 | #include <stdio.h> |
| 27 | #include <stdlib.h> |
| 28 | #include <string.h> |
| 29 | #include <errno.h> |
| 30 | |
| 31 | /** All sfiles are on this list. */ |
| 32 | static LIST_HEAD(lru_list); |
| 33 | |
| 34 | /* this value probably doesn't matter too much */ |
| 35 | #define LRU_AMOUNT 1000 |
| 36 | static int opd_24_sfile_lru_clear(void) |
| 37 | { |
| 38 | struct list_head * pos; |
| 39 | struct list_head * pos2; |
| 40 | struct opd_24_sfile * sfile; |
| 41 | int amount = LRU_AMOUNT; |
| 42 | |
| 43 | verbprintf(vsfile, "image lru clear\n"); |
| 44 | |
| 45 | if (list_empty(&lru_list)) |
| 46 | return 1; |
| 47 | |
| 48 | list_for_each_safe(pos, pos2, &lru_list) { |
| 49 | if (!--amount) |
| 50 | break; |
| 51 | sfile = list_entry(pos, struct opd_24_sfile, lru_next); |
| 52 | odb_close(&sfile->sample_file); |
| 53 | list_del_init(&sfile->lru_next); |
| 54 | } |
| 55 | |
| 56 | return 0; |
| 57 | } |
| 58 | |
| 59 | |
| 60 | void opd_24_sfile_lru(struct opd_24_sfile * sfile) |
| 61 | { |
| 62 | list_del(&sfile->lru_next); |
| 63 | list_add_tail(&sfile->lru_next, &lru_list); |
| 64 | } |
| 65 | |
| 66 | |
| 67 | static char * opd_mangle_filename(struct opd_image const * image, int counter, |
| 68 | int cpu_nr) |
| 69 | { |
| 70 | char * mangled; |
| 71 | struct mangle_values values; |
| 72 | struct opd_event * event = find_counter_event(counter); |
| 73 | |
| 74 | values.flags = 0; |
| 75 | if (image->kernel) |
| 76 | values.flags |= MANGLE_KERNEL; |
| 77 | |
| 78 | if (separate_thread) { |
| 79 | values.flags |= MANGLE_TGID | MANGLE_TID; |
| 80 | values.tid = image->tid; |
| 81 | values.tgid = image->tgid; |
| 82 | } |
| 83 | |
| 84 | if (separate_cpu) { |
| 85 | values.flags |= MANGLE_CPU; |
| 86 | values.cpu = cpu_nr; |
| 87 | } |
| 88 | |
| 89 | values.event_name = event->name; |
| 90 | values.count = event->count; |
| 91 | values.unit_mask = event->um; |
| 92 | |
| 93 | values.image_name = image->name; |
| 94 | values.dep_name = separate_lib && image->app_name |
| 95 | ? image->app_name : image->name; |
| 96 | |
| 97 | mangled = op_mangle_filename(&values); |
| 98 | |
| 99 | return mangled; |
| 100 | } |
| 101 | |
| 102 | |
| 103 | int opd_open_24_sample_file(struct opd_image * image, int counter, int cpu_nr) |
| 104 | { |
| 105 | char * mangled; |
| 106 | struct opd_24_sfile * sfile; |
| 107 | int err; |
| 108 | |
| 109 | mangled = opd_mangle_filename(image, counter, cpu_nr); |
| 110 | |
| 111 | verbprintf(vsfile, "Opening \"%s\"\n", mangled); |
| 112 | |
| 113 | create_path(mangled); |
| 114 | |
| 115 | sfile = image->sfiles[cpu_nr][counter]; |
| 116 | if (!sfile) { |
| 117 | sfile = malloc(sizeof(struct opd_24_sfile)); |
| 118 | list_init(&sfile->lru_next); |
| 119 | odb_init(&sfile->sample_file); |
| 120 | image->sfiles[cpu_nr][counter] = sfile; |
| 121 | } |
| 122 | |
| 123 | list_del(&sfile->lru_next); |
| 124 | list_add_tail(&sfile->lru_next, &lru_list); |
| 125 | |
| 126 | retry: |
| 127 | err = odb_open(&sfile->sample_file, mangled, ODB_RDWR, |
| 128 | sizeof(struct opd_header)); |
| 129 | |
| 130 | /* This can naturally happen when racing against opcontrol --reset. */ |
| 131 | if (err) { |
| 132 | if (err == EMFILE) { |
| 133 | if (opd_24_sfile_lru_clear()) { |
| 134 | printf("LRU cleared but odb_open() fails for %s.\n", mangled); |
| 135 | abort(); |
| 136 | } |
| 137 | goto retry; |
| 138 | } |
| 139 | |
| 140 | fprintf(stderr, "oprofiled: open of %s failed: %s\n", |
| 141 | mangled, strerror(err)); |
| 142 | goto out; |
| 143 | } |
| 144 | |
| 145 | fill_header(odb_get_data(&sfile->sample_file), counter, 0, 0, |
| 146 | image->kernel, 0, 0, 0, image->mtime); |
| 147 | |
| 148 | out: |
| 149 | free(mangled); |
| 150 | return err; |
| 151 | } |
| 152 | |
| 153 | |
| 154 | void opd_sync_samples_files(void) |
| 155 | { |
| 156 | struct list_head * pos; |
| 157 | struct opd_24_sfile * sfile; |
| 158 | |
| 159 | list_for_each(pos, &lru_list) { |
| 160 | sfile = list_entry(pos, struct opd_24_sfile, lru_next); |
| 161 | odb_sync(&sfile->sample_file); |
| 162 | } |
| 163 | } |
| 164 | |
| 165 | |
| 166 | void opd_close_image_samples_files(struct opd_image * image) |
| 167 | { |
| 168 | uint i, j; |
| 169 | for (i = 0 ; i < op_nr_counters ; ++i) { |
| 170 | for (j = 0; j < NR_CPUS; ++j) { |
| 171 | if (image->sfiles[j] && image->sfiles[j][i]) { |
| 172 | odb_close(&image->sfiles[j][i]->sample_file); |
| 173 | list_del(&image->sfiles[j][i]->lru_next); |
| 174 | free(image->sfiles[j][i]); |
| 175 | image->sfiles[j][i] = 0; |
| 176 | } |
| 177 | } |
| 178 | } |
| 179 | } |