65 lines
2.4 KiB
Java
65 lines
2.4 KiB
Java
/*
|
|
* Copyright (C) 2020 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.internal.util;
|
|
|
|
import android.os.SystemClock;
|
|
import android.util.Log;
|
|
import android.util.SparseLongArray;
|
|
|
|
import java.io.IOException;
|
|
|
|
/**
|
|
* A trigger implementation with perfetto backend.
|
|
* @hide
|
|
*/
|
|
public class PerfettoTrigger {
|
|
private static final String TAG = "PerfettoTrigger";
|
|
private static final String TRIGGER_COMMAND = "/system/bin/trigger_perfetto";
|
|
private static final long THROTTLE_MILLIS = 300000;
|
|
private static final SparseLongArray sLastInvocationPerTrigger = new SparseLongArray(100);
|
|
private static final Object sLock = new Object();
|
|
|
|
/**
|
|
* @param triggerName The name of the trigger. Must match the value defined in the AOT
|
|
* Perfetto config.
|
|
*/
|
|
public static void trigger(String triggerName) {
|
|
// Trace triggering has a non-negligible cost (fork+exec).
|
|
// To mitigate potential excessive triggering by the API client we ignore calls that happen
|
|
// too quickly after the most recent trigger.
|
|
synchronized (sLock) {
|
|
long lastTrigger = sLastInvocationPerTrigger.get(triggerName.hashCode());
|
|
long sinceLastTrigger = SystemClock.elapsedRealtime() - lastTrigger;
|
|
if (sinceLastTrigger < THROTTLE_MILLIS) {
|
|
Log.v(TAG, "Not triggering " + triggerName
|
|
+ " - not enough time since last trigger");
|
|
return;
|
|
}
|
|
|
|
sLastInvocationPerTrigger.put(triggerName.hashCode(), SystemClock.elapsedRealtime());
|
|
}
|
|
|
|
try {
|
|
ProcessBuilder pb = new ProcessBuilder(TRIGGER_COMMAND, triggerName);
|
|
Log.v(TAG, "Triggering " + String.join(" ", pb.command()));
|
|
pb.start();
|
|
} catch (IOException e) {
|
|
Log.w(TAG, "Failed to trigger " + triggerName, e);
|
|
}
|
|
}
|
|
}
|