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.
26 #include <osmocore/utils.h>
27 #include <osmocore/linuxlist.h>
28 #include <osmocore/talloc.h>
29 #include <osmocore/timer.h>
30 #include <osmocore/rate_ctr.h>
32 static LLIST_HEAD(rate_ctr_groups);
34 static void *tall_rate_ctr_ctx;
36 struct rate_ctr_group *rate_ctr_group_alloc(void *ctx,
37 const struct rate_ctr_group_desc *desc,
41 struct rate_ctr_group *group;
43 size = sizeof(struct rate_ctr_group) +
44 desc->num_ctr * sizeof(struct rate_ctr);
47 ctx = tall_rate_ctr_ctx;
49 group = talloc_zero_size(ctx, size);
56 llist_add(&group->list, &rate_ctr_groups);
61 void rate_ctr_group_free(struct rate_ctr_group *grp)
63 llist_del(&grp->list);
67 void rate_ctr_add(struct rate_ctr *ctr, int inc)
72 static void interval_expired(struct rate_ctr *ctr, enum rate_ctr_intv intv)
74 /* calculate rate over last interval */
75 ctr->intv[intv].rate = ctr->current - ctr->intv[intv].last;
76 /* save current counter for next interval */
77 ctr->intv[intv].last = ctr->current;
79 /* update the rate of the next bigger interval. This will
80 * be overwritten when that next larger interval expires */
81 if (intv + 1 < ARRAY_SIZE(ctr->intv))
82 ctr->intv[intv+1].rate += ctr->intv[intv].rate;
85 static struct timer_list rate_ctr_timer;
86 static uint64_t timer_ticks;
88 /* The one-second interval has expired */
89 static void rate_ctr_group_intv(struct rate_ctr_group *grp)
93 for (i = 0; i < grp->desc->num_ctr; i++) {
94 struct rate_ctr *ctr = &grp->ctr[i];
96 interval_expired(ctr, RATE_CTR_INTV_SEC);
97 if ((timer_ticks % 60) == 0)
98 interval_expired(ctr, RATE_CTR_INTV_MIN);
99 if ((timer_ticks % (60*60)) == 0)
100 interval_expired(ctr, RATE_CTR_INTV_HOUR);
101 if ((timer_ticks % (24*60*60)) == 0)
102 interval_expired(ctr, RATE_CTR_INTV_DAY);
106 static void rate_ctr_timer_cb(void *data)
108 struct rate_ctr_group *ctrg;
110 /* Increment number of ticks before we calculate intervals,
111 * as a counter value of 0 would already wrap all counters */
114 llist_for_each_entry(ctrg, &rate_ctr_groups, list)
115 rate_ctr_group_intv(ctrg);
117 bsc_schedule_timer(&rate_ctr_timer, 1, 0);
120 int rate_ctr_init(void *tall_ctx)
122 tall_rate_ctr_ctx = tall_ctx;
123 rate_ctr_timer.cb = rate_ctr_timer_cb;
124 bsc_schedule_timer(&rate_ctr_timer, 1, 0);