| /* |
| * Copyright 2018 Google, Inc |
| * |
| * 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. |
| */ |
| |
| #ifndef _STATSLOG_H_ |
| #define _STATSLOG_H_ |
| |
| #include <assert.h> |
| #include <inttypes.h> |
| #include <stats_event_list.h> |
| #include <stdbool.h> |
| #include <sys/cdefs.h> |
| |
| #include <cutils/properties.h> |
| |
| __BEGIN_DECLS |
| |
| struct memory_stat { |
| 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; |
| }; |
| |
| struct kernel_poll_info { |
| int poll_fd; |
| void (*handler)(int poll_fd); |
| }; |
| |
| /* |
| * These are defined in |
| * http://cs/android/frameworks/base/cmds/statsd/src/atoms.proto |
| */ |
| #define LMK_KILL_OCCURRED 51 |
| #define LMK_STATE_CHANGED 54 |
| #define LMK_STATE_CHANGE_START 1 |
| #define LMK_STATE_CHANGE_STOP 2 |
| |
| #ifdef LMKD_LOG_STATS |
| |
| /* |
| * The single event tag id for all stats logs. |
| * Keep this in sync with system/core/logcat/event.logtags |
| */ |
| const static int kStatsEventTag = 1937006964; |
| |
| void statslog_init(); |
| |
| void statslog_destroy(); |
| |
| #define MEMCG_PROCESS_MEMORY_STAT_PATH "/dev/memcg/apps/uid_%u/pid_%u/memory.stat" |
| #define PROC_STAT_FILE_PATH "/proc/%d/stat" |
| #define PROC_STAT_BUFFER_SIZE 1024 |
| #define BYTES_IN_KILOBYTE 1024 |
| |
| /** |
| * Logs the change in LMKD state which is used as start/stop boundaries for logging |
| * LMK_KILL_OCCURRED event. |
| * Code: LMK_STATE_CHANGED = 54 |
| */ |
| int |
| stats_write_lmk_state_changed(int32_t code, int32_t state); |
| |
| /** |
| * Logs the event when LMKD kills a process to reduce memory pressure. |
| * Code: LMK_KILL_OCCURRED = 51 |
| */ |
| int |
| stats_write_lmk_kill_occurred(int32_t code, int32_t uid, |
| char const* process_name, int32_t oom_score, int32_t min_oom_score, |
| int tasksize, struct memory_stat *mem_st); |
| |
| struct memory_stat *stats_read_memory_stat(bool per_app_memcg, int pid, uid_t uid); |
| |
| /** |
| * Registers a process taskname by pid, while it is still alive. |
| */ |
| void stats_store_taskname(int pid, const char* taskname, int poll_fd); |
| |
| /** |
| * Unregister all process tasknames. |
| */ |
| void stats_purge_tasknames(); |
| |
| /** |
| * Unregister a process taskname, e.g. after it has been killed. |
| */ |
| void stats_remove_taskname(int pid, int poll_fd); |
| |
| bool init_poll_kernel(struct kernel_poll_info *poll_info); |
| |
| #else /* LMKD_LOG_STATS */ |
| |
| static inline void statslog_init() {} |
| static inline void statslog_destroy() {} |
| |
| static inline int |
| stats_write_lmk_state_changed(int32_t code __unused, int32_t state __unused) { return -EINVAL; } |
| |
| static inline int |
| stats_write_lmk_kill_occurred(int32_t code __unused, int32_t uid __unused, |
| char const* process_name __unused, int32_t oom_score __unused, |
| int32_t min_oom_score __unused, int tasksize __unused, |
| struct memory_stat *mem_st __unused) { return -EINVAL; } |
| |
| static inline struct memory_stat *stats_read_memory_stat(bool per_app_memcg __unused, |
| int pid __unused, uid_t uid __unused) { return NULL; } |
| |
| static inline void stats_store_taskname(int pid __unused, const char* taskname __unused, |
| int poll_fd __unused) {} |
| |
| static inline void stats_purge_tasknames() {} |
| |
| static inline void stats_remove_taskname(int pid __unused, int poll_fd __unused) {} |
| |
| static inline bool init_poll_kernel(struct kernel_poll_info *poll_info __unused) { return false; } |
| |
| #endif /* LMKD_LOG_STATS */ |
| |
| __END_DECLS |
| |
| #endif /* _STATSLOG_H_ */ |