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 #include <assert.h>
18 #include <errno.h>
19 #include <log/log_id.h>
20 #include <stats_event_list.h>
21 #include <time.h>
22
getElapsedRealTimeNs()23 static int64_t getElapsedRealTimeNs() {
24 struct timespec t;
25 t.tv_sec = t.tv_nsec = 0;
26 clock_gettime(CLOCK_BOOTTIME, &t);
27 return (int64_t)t.tv_sec * 1000000000LL + t.tv_nsec;
28 }
29
30 /**
31 * Logs the change in LMKD state which is used as start/stop boundaries for logging
32 * LMK_KILL_OCCURRED event.
33 * Code: LMK_STATE_CHANGED = 54
34 */
35 int
stats_write_lmk_state_changed(android_log_context ctx,int32_t code,int32_t state)36 stats_write_lmk_state_changed(android_log_context ctx, int32_t code, int32_t state) {
37 assert(ctx != NULL);
38 int ret = -EINVAL;
39 if (!ctx) {
40 return ret;
41 }
42
43 reset_log_context(ctx);
44
45 if ((ret = android_log_write_int64(ctx, getElapsedRealTimeNs())) < 0) {
46 return ret;
47 }
48
49 if ((ret = android_log_write_int32(ctx, code)) < 0) {
50 return ret;
51 }
52
53 if ((ret = android_log_write_int32(ctx, state)) < 0) {
54 return ret;
55 }
56
57 return write_to_logger(ctx, LOG_ID_STATS);
58 }
59
60 /**
61 * Logs the event when LMKD kills a process to reduce memory pressure.
62 * Code: LMK_KILL_OCCURRED = 51
63 */
64 int
stats_write_lmk_kill_occurred(android_log_context ctx,int32_t code,int32_t uid,char const * process_name,int32_t oom_score,int64_t pgfault,int64_t pgmajfault,int64_t rss_in_bytes,int64_t cache_in_bytes,int64_t swap_in_bytes,int64_t process_start_time_ns,int32_t min_oom_score)65 stats_write_lmk_kill_occurred(android_log_context ctx, int32_t code, int32_t uid,
66 char const* process_name, int32_t oom_score, int64_t pgfault,
67 int64_t pgmajfault, int64_t rss_in_bytes, int64_t cache_in_bytes,
68 int64_t swap_in_bytes, int64_t process_start_time_ns,
69 int32_t min_oom_score) {
70 assert(ctx != NULL);
71 int ret = -EINVAL;
72 if (!ctx) {
73 return ret;
74 }
75 reset_log_context(ctx);
76
77 if ((ret = android_log_write_int64(ctx, getElapsedRealTimeNs())) < 0) {
78 return ret;
79 }
80
81 if ((ret = android_log_write_int32(ctx, code)) < 0) {
82 return ret;
83 }
84
85 if ((ret = android_log_write_int32(ctx, uid)) < 0) {
86 return ret;
87 }
88
89 if ((ret = android_log_write_string8(ctx, (process_name == NULL) ? "" : process_name)) < 0) {
90 return ret;
91 }
92
93 if ((ret = android_log_write_int32(ctx, oom_score)) < 0) {
94 return ret;
95 }
96
97 if ((ret = android_log_write_int64(ctx, pgfault)) < 0) {
98 return ret;
99 }
100
101 if ((ret = android_log_write_int64(ctx, pgmajfault)) < 0) {
102 return ret;
103 }
104
105 if ((ret = android_log_write_int64(ctx, rss_in_bytes)) < 0) {
106 return ret;
107 }
108
109 if ((ret = android_log_write_int64(ctx, cache_in_bytes)) < 0) {
110 return ret;
111 }
112
113 if ((ret = android_log_write_int64(ctx, swap_in_bytes)) < 0) {
114 return ret;
115 }
116
117 if ((ret = android_log_write_int64(ctx, process_start_time_ns)) < 0) {
118 return ret;
119 }
120
121 if ((ret = android_log_write_int32(ctx, min_oom_score)) < 0) {
122 return ret;
123 }
124
125 return write_to_logger(ctx, LOG_ID_STATS);
126 }
127