1 /*
2 * Copyright 2018 Google, Inc
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #ifndef _STATSLOG_H_
18 #define _STATSLOG_H_
19
20 #include <assert.h>
21 #include <stats_event_list.h>
22 #include <stdbool.h>
23 #include <sys/cdefs.h>
24
25 #include <cutils/properties.h>
26
27 __BEGIN_DECLS
28
29 /*
30 * These are defined in
31 * http://cs/android/frameworks/base/cmds/statsd/src/atoms.proto
32 */
33 #define LMK_KILL_OCCURRED 51
34 #define LMK_STATE_CHANGED 54
35 #define LMK_STATE_CHANGE_START 1
36 #define LMK_STATE_CHANGE_STOP 2
37
38 /*
39 * The single event tag id for all stats logs.
40 * Keep this in sync with system/core/logcat/event.logtags
41 */
42 const static int kStatsEventTag = 1937006964;
43
statslog_init(android_log_context * log_ctx,bool * enable_stats_log)44 static inline void statslog_init(android_log_context* log_ctx, bool* enable_stats_log) {
45 assert(log_ctx != NULL);
46 assert(enable_stats_log != NULL);
47 *enable_stats_log = property_get_bool("ro.lmk.log_stats", false);
48
49 if (*enable_stats_log) {
50 *log_ctx = create_android_logger(kStatsEventTag);
51 }
52 }
53
statslog_destroy(android_log_context * log_ctx)54 static inline void statslog_destroy(android_log_context* log_ctx) {
55 assert(log_ctx != NULL);
56 if (*log_ctx) {
57 android_log_destroy(log_ctx);
58 }
59 }
60
61 struct memory_stat {
62 int64_t pgfault;
63 int64_t pgmajfault;
64 int64_t rss_in_bytes;
65 int64_t cache_in_bytes;
66 int64_t swap_in_bytes;
67 int64_t process_start_time_ns;
68 };
69
70 #define MEMCG_PROCESS_MEMORY_STAT_PATH "/dev/memcg/apps/uid_%u/pid_%u/memory.stat"
71 #define PROC_STAT_FILE_PATH "/proc/%d/stat"
72 #define PROC_STAT_BUFFER_SIZE 1024
73 #define BYTES_IN_KILOBYTE 1024
74
75 /**
76 * Logs the change in LMKD state which is used as start/stop boundaries for logging
77 * LMK_KILL_OCCURRED event.
78 * Code: LMK_STATE_CHANGED = 54
79 */
80 int
81 stats_write_lmk_state_changed(android_log_context ctx, int32_t code, int32_t state);
82
83 /**
84 * Logs the event when LMKD kills a process to reduce memory pressure.
85 * Code: LMK_KILL_OCCURRED = 51
86 */
87 int
88 stats_write_lmk_kill_occurred(android_log_context ctx, int32_t code, int32_t uid,
89 char const* process_name, int32_t oom_score, int64_t pgfault,
90 int64_t pgmajfault, int64_t rss_in_bytes, int64_t cache_in_bytes,
91 int64_t swap_in_bytes, int64_t process_start_time_ns,
92 int32_t min_oom_score);
93
94 __END_DECLS
95
96 #endif /* _STATSLOG_H_ */
97