1 /* utility routines for keeping conters about events and the event rates */
3 /* (C) 2009-2010 by Harald Welte <laforge@gnumonks.org>
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.
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.
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.
27 #include <osmocore/utils.h>
28 #include <osmocore/linuxlist.h>
29 #include <osmocore/talloc.h>
30 #include <osmocore/timer.h>
31 #include <osmocore/rate_ctr.h>
33 static LLIST_HEAD(rate_ctr_groups);
35 static void *tall_rate_ctr_ctx;
37 struct rate_ctr_group *rate_ctr_group_alloc(void *ctx,
38 const struct rate_ctr_group_desc *desc,
42 struct rate_ctr_group *group;
44 size = sizeof(struct rate_ctr_group) +
45 desc->num_ctr * sizeof(struct rate_ctr);
48 ctx = tall_rate_ctr_ctx;
50 group = talloc_zero_size(ctx, size);
57 llist_add(&group->list, &rate_ctr_groups);
62 void rate_ctr_group_free(struct rate_ctr_group *grp)
64 llist_del(&grp->list);
68 void rate_ctr_add(struct rate_ctr *ctr, int inc)
73 static void interval_expired(struct rate_ctr *ctr, enum rate_ctr_intv intv)
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;
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;
86 static struct timer_list rate_ctr_timer;
87 static uint64_t timer_ticks;
89 /* The one-second interval has expired */
90 static void rate_ctr_group_intv(struct rate_ctr_group *grp)
94 for (i = 0; i < grp->desc->num_ctr; i++) {
95 struct rate_ctr *ctr = &grp->ctr[i];
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);
107 static void rate_ctr_timer_cb(void *data)
109 struct rate_ctr_group *ctrg;
111 /* Increment number of ticks before we calculate intervals,
112 * as a counter value of 0 would already wrap all counters */
115 llist_for_each_entry(ctrg, &rate_ctr_groups, list)
116 rate_ctr_group_intv(ctrg);
118 bsc_schedule_timer(&rate_ctr_timer, 1, 0);
121 int rate_ctr_init(void *tall_ctx)
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);