1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
|
/* utility routines for keeping conters about events and the event rates */
/* (C) 2009-2010 by Harald Welte <laforge@gnumonks.org>
*
* All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
/*! \addtogroup rate_ctr
* @{
*/
/*! \file rate_ctr.c */
#include <stdint.h>
#include <string.h>
#include <osmocom/core/utils.h>
#include <osmocom/core/linuxlist.h>
#include <osmocom/core/talloc.h>
#include <osmocom/core/timer.h>
#include <osmocom/core/rate_ctr.h>
static LLIST_HEAD(rate_ctr_groups);
static void *tall_rate_ctr_ctx;
/*! \brief Allocate a new group of counters according to description
* \param[in] ctx \ref talloc context
* \param[in] desc Rate counter group description
* \param[in] idx Index of new counter group
*/
struct rate_ctr_group *rate_ctr_group_alloc(void *ctx,
const struct rate_ctr_group_desc *desc,
unsigned int idx)
{
unsigned int size;
struct rate_ctr_group *group;
size = sizeof(struct rate_ctr_group) +
desc->num_ctr * sizeof(struct rate_ctr);
if (!ctx)
ctx = tall_rate_ctr_ctx;
group = talloc_zero_size(ctx, size);
if (!group)
return NULL;
group->desc = desc;
group->idx = idx;
llist_add(&group->list, &rate_ctr_groups);
return group;
}
/*! \brief Free the memory for the specified group of counters */
void rate_ctr_group_free(struct rate_ctr_group *grp)
{
llist_del(&grp->list);
talloc_free(grp);
}
/*! \brief Add a number to the counter */
void rate_ctr_add(struct rate_ctr *ctr, int inc)
{
ctr->current += inc;
}
static void interval_expired(struct rate_ctr *ctr, enum rate_ctr_intv intv)
{
/* calculate rate over last interval */
ctr->intv[intv].rate = ctr->current - ctr->intv[intv].last;
/* save current counter for next interval */
ctr->intv[intv].last = ctr->current;
/* update the rate of the next bigger interval. This will
* be overwritten when that next larger interval expires */
if (intv + 1 < ARRAY_SIZE(ctr->intv))
ctr->intv[intv+1].rate += ctr->intv[intv].rate;
}
static struct osmo_timer_list rate_ctr_timer;
static uint64_t timer_ticks;
/* The one-second interval has expired */
static void rate_ctr_group_intv(struct rate_ctr_group *grp)
{
unsigned int i;
for (i = 0; i < grp->desc->num_ctr; i++) {
struct rate_ctr *ctr = &grp->ctr[i];
interval_expired(ctr, RATE_CTR_INTV_SEC);
if ((timer_ticks % 60) == 0)
interval_expired(ctr, RATE_CTR_INTV_MIN);
if ((timer_ticks % (60*60)) == 0)
interval_expired(ctr, RATE_CTR_INTV_HOUR);
if ((timer_ticks % (24*60*60)) == 0)
interval_expired(ctr, RATE_CTR_INTV_DAY);
}
}
static void rate_ctr_timer_cb(void *data)
{
struct rate_ctr_group *ctrg;
/* Increment number of ticks before we calculate intervals,
* as a counter value of 0 would already wrap all counters */
timer_ticks++;
llist_for_each_entry(ctrg, &rate_ctr_groups, list)
rate_ctr_group_intv(ctrg);
osmo_timer_schedule(&rate_ctr_timer, 1, 0);
}
/*! \brief Initialize the counter module */
int rate_ctr_init(void *tall_ctx)
{
tall_rate_ctr_ctx = tall_ctx;
rate_ctr_timer.cb = rate_ctr_timer_cb;
osmo_timer_schedule(&rate_ctr_timer, 1, 0);
return 0;
}
/*! \brief Search for counter group based on group name and index */
struct rate_ctr_group *rate_ctr_get_group_by_name_idx(const char *name, const unsigned int idx)
{
struct rate_ctr_group *ctrg;
llist_for_each_entry(ctrg, &rate_ctr_groups, list) {
if (!ctrg->desc)
continue;
if (!strcmp(ctrg->desc->group_name_prefix, name) &&
ctrg->idx == idx) {
return ctrg;
}
}
return NULL;
}
/*! \brief Search for counter group based on group name */
const struct rate_ctr *rate_ctr_get_by_name(const struct rate_ctr_group *ctrg, const char *name)
{
int i;
const struct rate_ctr_desc *ctr_desc;
if (!ctrg->desc)
return NULL;
for (i = 0; i < ctrg->desc->num_ctr; i++) {
ctr_desc = &ctrg->desc->ctr_desc[i];
if (!strcmp(ctr_desc->name, name)) {
return &ctrg->ctr[i];
}
}
return NULL;
}
/*! @} */
|
