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
181
182
183
|
/*
* @copyright Copyright (c) 2016-2020 TOYOTA MOTOR CORPORATION.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <time.h>
#include <string.h>
#include <stdlib.h>
#include "ss_resm_resourcemanagerlog.h"
#define DROP_CACHES "/proc/sys/vm/drop_caches"
// FRAMEWORKUNIFIEDLOG
FRAMEWORKUNIFIEDLOGPARAM g_FrameworkunifiedLogParams = {
FRAMEWORKUNIFIEDLOGOPTIONS,
{
ZONE_TEXT_10, ZONE_TEXT_11, ZONE_TEXT_12,
ZONE_TEXT_13, ZONE_TEXT_14, ZONE_TEXT_15,
ZONE_TEXT_16, ZONE_TEXT_17, ZONE_TEXT_18,
ZONE_TEXT_19, ZONE_TEXT_20, ZONE_TEXT_21,
ZONE_TEXT_22, ZONE_TEXT_23, ZONE_TEXT_24,
ZONE_TEXT_25, ZONE_TEXT_26, ZONE_TEXT_27,
ZONE_TEXT_28, ZONE_TEXT_29, ZONE_TEXT_30,
ZONE_TEXT_31
},
FRAMEWORKUNIFIEDLOGZONES
};
// echo 1 > /proc/sys/vm/drop_caches
#define DROP_CACHES_INTVAL_TIMESEC (1 * 10) // 10 sec
#define MEMINFO_FILE "/proc/meminfo"
/* memFree threshold */
#define MEMFREE_THRETHOLD (100*1024)
/* LowFree - CmaFree threshold */
#define LOWFREE_THRETHOLD (50*1024)
static uint32_t mainFree_kib;
static uint32_t lowFree_kib;
static uint32_t cmaFree_kib;
// meminfo table
typedef struct {
const char* name;
uint32_t* value;
} meminfo_tbl;
static int32_t get_meminfo(void);
static int32_t comp_meminfo_tbl(const void* data1, const void* data2);
static bool judge_cachedrop(void);
static void
exec_drop_caches(void) {
int fd;
fd = open(DROP_CACHES, O_RDWR);
if (fd >= 0) {
write(fd, (const void *)"1", 1);
close(fd);
} else {
FRAMEWORKUNIFIEDLOG(ZONE_ERR, __FUNCTION__, "%s open error (fd:%d, errno:%d)", DROP_CACHES, fd, errno);
}
}
int
main(int argc, char* argv[]) {
const struct timespec drop_caches_intval = {DROP_CACHES_INTVAL_TIMESEC, 0};
FRAMEWORKUNIFIED_SET_ZONES();
while (1) {
/* Get meminfo */
get_meminfo();
if (judge_cachedrop()) {
exec_drop_caches();
}
nanosleep(&drop_caches_intval, NULL);
}
return 0;
}
/* Compare memory information */
static int32_t
comp_meminfo_tbl(const void* data1, const void* data2) {
return strcmp(((const meminfo_tbl*)data1)->name,
((const meminfo_tbl*)data2)->name);
}
/* Get memory information */
static int32_t
get_meminfo(void) {
int32_t meminfo_fd = -1;
char srch_name[16];
char buf[2048];
meminfo_tbl target = {srch_name, NULL};
meminfo_tbl* found;
char* head;
char* tail;
int32_t read_byte;
/* Strings must be in ascending order when adding entries to this table (for bsearch) */
static const meminfo_tbl mem_table[] = {
{"CmaFree", &cmaFree_kib},
{"LowFree", &lowFree_kib},
{"MemFree", &mainFree_kib},
};
const int32_t mem_table_count = sizeof(mem_table)/sizeof(meminfo_tbl);
if (meminfo_fd == -1) {
meminfo_fd = open(MEMINFO_FILE, O_RDONLY);
if (meminfo_fd == -1) {
fflush(NULL);
return -1;
}
}
lseek(meminfo_fd, 0L, SEEK_SET);
read_byte = read (meminfo_fd, buf, sizeof(buf) - 1);
if (read_byte < 0) {
fflush(NULL);
close(meminfo_fd);
return -1;
}
buf[read_byte] = '\0';
head = buf;
while (1) {
tail = strchr(head, ':');
if (!tail) {
break;
}
*tail = '\0';
if (strlen (head) >= sizeof(srch_name)) {
head = tail + 1;
} else {
strcpy(srch_name, head); // NOLINT
found = reinterpret_cast<meminfo_tbl *>(bsearch(&target, mem_table, mem_table_count,
sizeof(meminfo_tbl), comp_meminfo_tbl));
head = tail + 1;
if (found) {
*(found->value) = strtoul(head, &tail, 10);
}
}
tail = strchr(head, '\n');
if (!tail)
break;
head = tail + 1;
}
close(meminfo_fd);
return 0;
}
static bool
judge_cachedrop(void) {
if (mainFree_kib < MEMFREE_THRETHOLD) {
return true;
}
if ((lowFree_kib - cmaFree_kib) < LOWFREE_THRETHOLD) {
return true;
}
return false;
}
|
