1417cdbddb
This is to measure an application's behavior with respect to being LMKed (the longer an app lives before being LMKed, the better). Bug: 119854389 Test: Manual Change-Id: I4ef6433391c8758626334731d2b5de038e4468ae Merged-In: I4ef6433391c8758626334731d2b5de038e4468ae (cherry picked from I4ef6433391c8758626334731d2b5de038e4468ae)
95 lines
2.7 KiB
C
95 lines
2.7 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 <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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/*
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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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/*
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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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static inline void statslog_init(android_log_context* log_ctx, bool* enable_stats_log) {
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assert(log_ctx != NULL);
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assert(enable_stats_log != NULL);
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*enable_stats_log = property_get_bool("ro.lmk.log_stats", false);
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if (*enable_stats_log) {
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*log_ctx = create_android_logger(kStatsEventTag);
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}
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}
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static inline void statslog_destroy(android_log_context* log_ctx) {
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assert(log_ctx != NULL);
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if (*log_ctx) {
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android_log_destroy(log_ctx);
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}
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}
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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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#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(android_log_context ctx, 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(android_log_context ctx, int32_t code, int32_t uid,
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char const* process_name, int32_t oom_score, int64_t pgfault,
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int64_t pgmajfault, int64_t rss_in_bytes, int64_t cache_in_bytes,
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int64_t swap_in_bytes, int64_t process_start_time_ns);
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__END_DECLS
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#endif /* _STATSLOG_H_ */
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