Harald Welte | 7b45d60 | 2010-05-13 11:35:30 +0200 | [diff] [blame] | 1 | /* utility routines for keeping conters about events and the event rates */ |
| 2 | |
| 3 | /* (C) 2009-2010 by Harald Welte <laforge@gnumonks.org> |
| 4 | * |
| 5 | * All Rights Reserved |
| 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 along |
| 18 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 19 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | */ |
| 22 | |
| 23 | #include <stdint.h> |
| 24 | #include <inttypes.h> |
| 25 | #include <string.h> |
| 26 | |
| 27 | #include <osmocore/linuxlist.h> |
| 28 | #include <osmocore/talloc.h> |
| 29 | #include <osmocore/timer.h> |
| 30 | #include <osmocore/rate_ctr.h> |
| 31 | |
| 32 | static LLIST_HEAD(rate_ctr_groups); |
| 33 | |
| 34 | static void *tall_rate_ctr_ctx; |
| 35 | |
| 36 | struct rate_ctr_group *rate_ctr_group_alloc(void *ctx, |
| 37 | const struct rate_ctr_group_desc *desc, |
| 38 | unsigned int idx) |
| 39 | { |
| 40 | unsigned int size; |
| 41 | struct rate_ctr_group *group; |
| 42 | |
| 43 | size = sizeof(struct rate_ctr_group) + |
| 44 | desc->num_ctr * sizeof(struct rate_ctr); |
| 45 | |
| 46 | if (!ctx) |
| 47 | ctx = tall_rate_ctr_ctx; |
| 48 | |
| 49 | group = talloc_zero_size(ctx, size); |
| 50 | if (!group) |
| 51 | return NULL; |
| 52 | |
| 53 | group->desc = desc; |
| 54 | /* Generate the Group prefix from the user-specified index */ |
| 55 | group->name_prefix = talloc_size(group, strlen(desc->group_prefix_fmt) + 20); |
| 56 | sprintf(group->name_prefix, desc->group_prefix_fmt, idx); |
| 57 | |
| 58 | llist_add(&group->list, &rate_ctr_groups); |
| 59 | |
| 60 | return group; |
| 61 | } |
| 62 | |
| 63 | void rate_ctr_group_free(struct rate_ctr_group *grp) |
| 64 | { |
| 65 | llist_del(&grp->list); |
| 66 | talloc_free(grp); |
| 67 | } |
| 68 | |
| 69 | void rate_ctr_add(struct rate_ctr *ctr, int inc) |
| 70 | { |
| 71 | ctr->current += inc; |
| 72 | } |
| 73 | |
| 74 | static void interval_expired(struct rate_ctr *ctr, enum rate_ctr_intv intv) |
| 75 | { |
| 76 | /* calculate rate over last interval */ |
| 77 | ctr->intv[intv].rate = ctr->current - ctr->intv[intv].last; |
| 78 | /* save current counter for next interval */ |
| 79 | ctr->intv[intv].last = ctr->current; |
| 80 | } |
| 81 | |
| 82 | static struct timer_list rate_ctr_timer; |
| 83 | static uint64_t timer_ticks; |
| 84 | |
| 85 | /* The one-second interval has expired */ |
| 86 | static void rate_ctr_group_intv(struct rate_ctr_group *grp) |
| 87 | { |
| 88 | unsigned int i; |
| 89 | |
| 90 | for (i = 0; i < grp->desc->num_ctr; i++) { |
| 91 | struct rate_ctr *ctr = &grp->ctr[i]; |
| 92 | |
| 93 | interval_expired(ctr, RATE_CTR_INTV_SEC); |
| 94 | if ((timer_ticks % 60) == 0) |
| 95 | interval_expired(ctr, RATE_CTR_INTV_MIN); |
| 96 | if ((timer_ticks % (60*60)) == 0) |
| 97 | interval_expired(ctr, RATE_CTR_INTV_HOUR); |
| 98 | if ((timer_ticks % (24*60*60)) == 0) |
| 99 | interval_expired(ctr, RATE_CTR_INTV_DAY); |
| 100 | } |
| 101 | } |
| 102 | |
| 103 | static void rate_ctr_timer_cb(void *data) |
| 104 | { |
| 105 | struct rate_ctr_group *ctrg; |
| 106 | |
| 107 | /* Increment number of ticks before we calculate intervals, |
| 108 | * as a counter value of 0 would already wrap all counters */ |
| 109 | timer_ticks++; |
| 110 | |
| 111 | llist_for_each_entry(ctrg, &rate_ctr_groups, list) |
| 112 | rate_ctr_group_intv(ctrg); |
| 113 | |
| 114 | bsc_schedule_timer(&rate_ctr_timer, 1, 0); |
| 115 | } |
| 116 | |
| 117 | int rate_ctr_init(void *tall_ctx) |
| 118 | { |
| 119 | tall_rate_ctr_ctx = tall_ctx; |
| 120 | rate_ctr_timer.cb = rate_ctr_timer_cb; |
| 121 | bsc_schedule_timer(&rate_ctr_timer, 1, 0); |
| 122 | |
| 123 | return 0; |
| 124 | } |