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 | |
Harald Welte | d2dce6d | 2010-05-13 13:28:12 +0200 | [diff] [blame] | 27 | #include <osmocore/utils.h> |
Harald Welte | 7b45d60 | 2010-05-13 11:35:30 +0200 | [diff] [blame] | 28 | #include <osmocore/linuxlist.h> |
| 29 | #include <osmocore/talloc.h> |
| 30 | #include <osmocore/timer.h> |
| 31 | #include <osmocore/rate_ctr.h> |
| 32 | |
| 33 | static LLIST_HEAD(rate_ctr_groups); |
| 34 | |
| 35 | static void *tall_rate_ctr_ctx; |
| 36 | |
| 37 | struct rate_ctr_group *rate_ctr_group_alloc(void *ctx, |
| 38 | const struct rate_ctr_group_desc *desc, |
| 39 | unsigned int idx) |
| 40 | { |
| 41 | unsigned int size; |
| 42 | struct rate_ctr_group *group; |
| 43 | |
| 44 | size = sizeof(struct rate_ctr_group) + |
| 45 | desc->num_ctr * sizeof(struct rate_ctr); |
| 46 | |
| 47 | if (!ctx) |
| 48 | ctx = tall_rate_ctr_ctx; |
| 49 | |
| 50 | group = talloc_zero_size(ctx, size); |
| 51 | if (!group) |
| 52 | return NULL; |
| 53 | |
| 54 | group->desc = desc; |
Harald Welte | 087fcff | 2010-05-13 12:16:17 +0200 | [diff] [blame] | 55 | group->idx = idx; |
Harald Welte | 7b45d60 | 2010-05-13 11:35:30 +0200 | [diff] [blame] | 56 | |
| 57 | llist_add(&group->list, &rate_ctr_groups); |
| 58 | |
| 59 | return group; |
| 60 | } |
| 61 | |
| 62 | void rate_ctr_group_free(struct rate_ctr_group *grp) |
| 63 | { |
| 64 | llist_del(&grp->list); |
| 65 | talloc_free(grp); |
| 66 | } |
| 67 | |
| 68 | void rate_ctr_add(struct rate_ctr *ctr, int inc) |
| 69 | { |
| 70 | ctr->current += inc; |
| 71 | } |
| 72 | |
| 73 | static void interval_expired(struct rate_ctr *ctr, enum rate_ctr_intv intv) |
| 74 | { |
| 75 | /* calculate rate over last interval */ |
| 76 | ctr->intv[intv].rate = ctr->current - ctr->intv[intv].last; |
| 77 | /* save current counter for next interval */ |
| 78 | ctr->intv[intv].last = ctr->current; |
Harald Welte | d2dce6d | 2010-05-13 13:28:12 +0200 | [diff] [blame] | 79 | |
| 80 | /* update the rate of the next bigger interval. This will |
| 81 | * be overwritten when that next larger interval expires */ |
| 82 | if (intv + 1 < ARRAY_SIZE(ctr->intv)) |
| 83 | ctr->intv[intv+1].rate += ctr->intv[intv].rate; |
Harald Welte | 7b45d60 | 2010-05-13 11:35:30 +0200 | [diff] [blame] | 84 | } |
| 85 | |
| 86 | static struct timer_list rate_ctr_timer; |
| 87 | static uint64_t timer_ticks; |
| 88 | |
| 89 | /* The one-second interval has expired */ |
| 90 | static void rate_ctr_group_intv(struct rate_ctr_group *grp) |
| 91 | { |
| 92 | unsigned int i; |
| 93 | |
| 94 | for (i = 0; i < grp->desc->num_ctr; i++) { |
| 95 | struct rate_ctr *ctr = &grp->ctr[i]; |
| 96 | |
| 97 | interval_expired(ctr, RATE_CTR_INTV_SEC); |
| 98 | if ((timer_ticks % 60) == 0) |
| 99 | interval_expired(ctr, RATE_CTR_INTV_MIN); |
| 100 | if ((timer_ticks % (60*60)) == 0) |
| 101 | interval_expired(ctr, RATE_CTR_INTV_HOUR); |
| 102 | if ((timer_ticks % (24*60*60)) == 0) |
| 103 | interval_expired(ctr, RATE_CTR_INTV_DAY); |
| 104 | } |
| 105 | } |
| 106 | |
| 107 | static void rate_ctr_timer_cb(void *data) |
| 108 | { |
| 109 | struct rate_ctr_group *ctrg; |
| 110 | |
| 111 | /* Increment number of ticks before we calculate intervals, |
| 112 | * as a counter value of 0 would already wrap all counters */ |
| 113 | timer_ticks++; |
| 114 | |
| 115 | llist_for_each_entry(ctrg, &rate_ctr_groups, list) |
| 116 | rate_ctr_group_intv(ctrg); |
| 117 | |
| 118 | bsc_schedule_timer(&rate_ctr_timer, 1, 0); |
| 119 | } |
| 120 | |
| 121 | int rate_ctr_init(void *tall_ctx) |
| 122 | { |
| 123 | tall_rate_ctr_ctx = tall_ctx; |
| 124 | rate_ctr_timer.cb = rate_ctr_timer_cb; |
| 125 | bsc_schedule_timer(&rate_ctr_timer, 1, 0); |
| 126 | |
| 127 | return 0; |
| 128 | } |