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/*
* Copyright (C) 2021 The Android Open Source Project
*
* 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.
*/
package com.android.server.am;
import static com.android.server.am.ActivityManagerDebugConfig.TAG_AM;
import static com.android.server.am.ActivityManagerDebugConfig.TAG_WITH_CLASS_NAME;
import android.util.Slog;
import com.android.internal.util.FrameworkStatsLog;
import java.io.DataInputStream;
import java.io.IOException;
/**
* Activity manager communication with lmkd data handling and statsd atom logging
*/
public final class LmkdStatsReporter {
static final String TAG = TAG_WITH_CLASS_NAME ? "LmkdStatsReporter" : TAG_AM;
public static final int KILL_OCCURRED_MSG_SIZE = 80;
public static final int STATE_CHANGED_MSG_SIZE = 8;
private static final int PRESSURE_AFTER_KILL = 0;
private static final int NOT_RESPONDING = 1;
private static final int LOW_SWAP_AND_THRASHING = 2;
private static final int LOW_MEM_AND_SWAP = 3;
private static final int LOW_MEM_AND_THRASHING = 4;
private static final int DIRECT_RECL_AND_THRASHING = 5;
private static final int LOW_MEM_AND_SWAP_UTIL = 6;
private static final int LOW_FILECACHE_AFTER_THRASHING = 7;
private static final int LOW_MEM = 8;
private static final int DIRECT_RECL_STUCK = 9;
/**
* Processes the LMK_KILL_OCCURRED packet data
* Logs the event when LMKD kills a process to reduce memory pressure.
* Code: LMK_KILL_OCCURRED = 51
*/
public static void logKillOccurred(DataInputStream inputData, int totalForegroundServices,
int procsWithForegroundServices) {
try {
final long pgFault = inputData.readLong();
final long pgMajFault = inputData.readLong();
final long rssInBytes = inputData.readLong();
final long cacheInBytes = inputData.readLong();
final long swapInBytes = inputData.readLong();
final long processStartTimeNS = inputData.readLong();
final int uid = inputData.readInt();
final int oomScore = inputData.readInt();
final int minOomScore = inputData.readInt();
final int freeMemKb = inputData.readInt();
final int freeSwapKb = inputData.readInt();
final int killReason = inputData.readInt();
final int thrashing = inputData.readInt();
final int maxThrashing = inputData.readInt();
final String procName = inputData.readUTF();
FrameworkStatsLog.write(FrameworkStatsLog.LMK_KILL_OCCURRED, uid, procName, oomScore,
pgFault, pgMajFault, rssInBytes, cacheInBytes, swapInBytes, processStartTimeNS,
minOomScore, freeMemKb, freeSwapKb, mapKillReason(killReason), thrashing,
maxThrashing, totalForegroundServices, procsWithForegroundServices);
} catch (IOException e) {
Slog.e(TAG, "Invalid buffer data. Failed to log LMK_KILL_OCCURRED");
return;
}
}
/**
* Processes the LMK_STATE_CHANGED packet
* Logs the change in LMKD state which is used as start/stop boundaries for logging
* LMK_KILL_OCCURRED event.
* Code: LMK_STATE_CHANGED = 54
*/
public static void logStateChanged(int state) {
FrameworkStatsLog.write(FrameworkStatsLog.LMK_STATE_CHANGED, state);
}
private static int mapKillReason(int reason) {
switch (reason) {
case PRESSURE_AFTER_KILL:
return FrameworkStatsLog.LMK_KILL_OCCURRED__REASON__PRESSURE_AFTER_KILL;
case NOT_RESPONDING:
return FrameworkStatsLog.LMK_KILL_OCCURRED__REASON__NOT_RESPONDING;
case LOW_SWAP_AND_THRASHING:
return FrameworkStatsLog.LMK_KILL_OCCURRED__REASON__LOW_SWAP_AND_THRASHING;
case LOW_MEM_AND_SWAP:
return FrameworkStatsLog.LMK_KILL_OCCURRED__REASON__LOW_MEM_AND_SWAP;
case LOW_MEM_AND_THRASHING:
return FrameworkStatsLog.LMK_KILL_OCCURRED__REASON__LOW_MEM_AND_THRASHING;
case DIRECT_RECL_AND_THRASHING:
return FrameworkStatsLog.LMK_KILL_OCCURRED__REASON__DIRECT_RECL_AND_THRASHING;
case LOW_MEM_AND_SWAP_UTIL:
return FrameworkStatsLog.LMK_KILL_OCCURRED__REASON__LOW_MEM_AND_SWAP_UTIL;
case LOW_FILECACHE_AFTER_THRASHING:
return FrameworkStatsLog.LMK_KILL_OCCURRED__REASON__LOW_FILECACHE_AFTER_THRASHING;
case LOW_MEM:
return FrameworkStatsLog.LMK_KILL_OCCURRED__REASON__LOW_MEM;
case DIRECT_RECL_STUCK:
return FrameworkStatsLog.LMK_KILL_OCCURRED__REASON__DIRECT_RECL_STUCK;
default:
return FrameworkStatsLog.LMK_KILL_OCCURRED__REASON__UNKNOWN;
}
}
}
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