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)
121 lines
3.2 KiB
C
121 lines
3.2 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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#include <assert.h>
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#include <errno.h>
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#include <log/log_id.h>
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#include <stats_event_list.h>
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#include <time.h>
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static int64_t getElapsedRealTimeNs() {
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struct timespec t;
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t.tv_sec = t.tv_nsec = 0;
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clock_gettime(CLOCK_BOOTTIME, &t);
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return (int64_t)t.tv_sec * 1000000000LL + t.tv_nsec;
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}
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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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assert(ctx != NULL);
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int ret = -EINVAL;
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if (!ctx) {
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return ret;
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}
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reset_log_context(ctx);
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if ((ret = android_log_write_int64(ctx, getElapsedRealTimeNs())) < 0) {
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return ret;
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}
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if ((ret = android_log_write_int32(ctx, code)) < 0) {
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return ret;
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}
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if ((ret = android_log_write_int32(ctx, state)) < 0) {
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return ret;
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}
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return write_to_logger(ctx, LOG_ID_STATS);
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}
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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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assert(ctx != NULL);
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int ret = -EINVAL;
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if (!ctx) {
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return ret;
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}
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reset_log_context(ctx);
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if ((ret = android_log_write_int64(ctx, getElapsedRealTimeNs())) < 0) {
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return ret;
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}
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if ((ret = android_log_write_int32(ctx, code)) < 0) {
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return ret;
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}
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if ((ret = android_log_write_int32(ctx, uid)) < 0) {
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return ret;
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}
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if ((ret = android_log_write_string8(ctx, (process_name == NULL) ? "" : process_name)) < 0) {
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return ret;
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}
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if ((ret = android_log_write_int32(ctx, oom_score)) < 0) {
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return ret;
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}
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if ((ret = android_log_write_int64(ctx, pgfault)) < 0) {
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return ret;
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}
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if ((ret = android_log_write_int64(ctx, pgmajfault)) < 0) {
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return ret;
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}
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if ((ret = android_log_write_int64(ctx, rss_in_bytes)) < 0) {
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return ret;
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}
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if ((ret = android_log_write_int64(ctx, cache_in_bytes)) < 0) {
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return ret;
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}
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if ((ret = android_log_write_int64(ctx, swap_in_bytes)) < 0) {
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return ret;
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}
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if ((ret = android_log_write_int64(ctx, process_start_time_ns)) < 0) {
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return ret;
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}
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return write_to_logger(ctx, LOG_ID_STATS);
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}
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