b72c66515b
Move statsd related code out of lmkd.c to minimize ifdefs sprinkled around the code and make it more maintainable. Bug: 74119935 Test: lmkd_unit_test Change-Id: Ib22f90fd380b9a31e09ab18ef16787bc07415ddf Signed-off-by: Suren Baghdasaryan <surenb@google.com>
136 lines
3.9 KiB
C
136 lines
3.9 KiB
C
/*
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* Copyright 2018 Google, Inc
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef _STATSLOG_H_
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#define _STATSLOG_H_
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#include <assert.h>
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#include <inttypes.h>
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#include <stats_event_list.h>
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#include <stdbool.h>
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#include <sys/cdefs.h>
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#include <cutils/properties.h>
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__BEGIN_DECLS
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struct memory_stat {
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int64_t pgfault;
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int64_t pgmajfault;
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int64_t rss_in_bytes;
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int64_t cache_in_bytes;
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int64_t swap_in_bytes;
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int64_t process_start_time_ns;
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};
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struct kernel_poll_info {
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int poll_fd;
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void (*handler)(int poll_fd);
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};
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/*
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* These are defined in
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* http://cs/android/frameworks/base/cmds/statsd/src/atoms.proto
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*/
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#define LMK_KILL_OCCURRED 51
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#define LMK_STATE_CHANGED 54
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#define LMK_STATE_CHANGE_START 1
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#define LMK_STATE_CHANGE_STOP 2
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#ifdef LMKD_LOG_STATS
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/*
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* The single event tag id for all stats logs.
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* Keep this in sync with system/core/logcat/event.logtags
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*/
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const static int kStatsEventTag = 1937006964;
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void statslog_init();
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void statslog_destroy();
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#define MEMCG_PROCESS_MEMORY_STAT_PATH "/dev/memcg/apps/uid_%u/pid_%u/memory.stat"
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#define PROC_STAT_FILE_PATH "/proc/%d/stat"
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#define PROC_STAT_BUFFER_SIZE 1024
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#define BYTES_IN_KILOBYTE 1024
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/**
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* Logs the change in LMKD state which is used as start/stop boundaries for logging
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* LMK_KILL_OCCURRED event.
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* Code: LMK_STATE_CHANGED = 54
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*/
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int
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stats_write_lmk_state_changed(int32_t code, int32_t state);
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/**
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* Logs the event when LMKD kills a process to reduce memory pressure.
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* Code: LMK_KILL_OCCURRED = 51
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*/
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int
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stats_write_lmk_kill_occurred(int32_t code, int32_t uid,
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char const* process_name, int32_t oom_score, int32_t min_oom_score,
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int tasksize, struct memory_stat *mem_st);
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struct memory_stat *stats_read_memory_stat(bool per_app_memcg, int pid, uid_t uid);
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/**
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* Registers a process taskname by pid, while it is still alive.
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*/
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void stats_store_taskname(int pid, const char* taskname, int poll_fd);
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/**
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* Unregister all process tasknames.
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*/
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void stats_purge_tasknames();
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/**
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* Unregister a process taskname, e.g. after it has been killed.
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*/
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void stats_remove_taskname(int pid, int poll_fd);
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bool init_poll_kernel(struct kernel_poll_info *poll_info);
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#else /* LMKD_LOG_STATS */
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static inline void statslog_init() {}
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static inline void statslog_destroy() {}
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static inline int
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stats_write_lmk_state_changed(int32_t code __unused, int32_t state __unused) { return -EINVAL; }
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static inline int
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stats_write_lmk_kill_occurred(int32_t code __unused, int32_t uid __unused,
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char const* process_name __unused, int32_t oom_score __unused,
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int32_t min_oom_score __unused, int tasksize __unused,
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struct memory_stat *mem_st __unused) { return -EINVAL; }
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static inline struct memory_stat *stats_read_memory_stat(bool per_app_memcg __unused,
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int pid __unused, uid_t uid __unused) { return NULL; }
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static inline void stats_store_taskname(int pid __unused, const char* taskname __unused,
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int poll_fd __unused) {}
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static inline void stats_purge_tasknames() {}
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static inline void stats_remove_taskname(int pid __unused, int poll_fd __unused) {}
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static inline bool init_poll_kernel(struct kernel_poll_info *poll_info __unused) { return false; }
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#endif /* LMKD_LOG_STATS */
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__END_DECLS
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#endif /* _STATSLOG_H_ */
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