| /* |
| * Copyright (C) 2019 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.utils; |
| |
| import android.annotation.NonNull; |
| import android.os.Trace; |
| import android.util.Slog; |
| import android.util.TimingsTraceLog; |
| |
| /** |
| * Helper class for reporting boot and shutdown timing metrics, also logging to {@link Slog}. |
| */ |
| public final class TimingsTraceAndSlog extends TimingsTraceLog { |
| |
| /** |
| * Tag for timing measurement of main thread. |
| */ |
| public static final String SYSTEM_SERVER_TIMING_TAG = "SystemServerTiming"; |
| |
| /** |
| * Tag for timing measurement of non-main asynchronous operations. |
| */ |
| private static final String SYSTEM_SERVER_TIMING_ASYNC_TAG = SYSTEM_SERVER_TIMING_TAG + "Async"; |
| |
| /** |
| * Set this to a positive value to get a {@Slog.w} log for any trace that took longer than it. |
| */ |
| private static final long BOTTLENECK_DURATION_MS = -1; |
| |
| private final String mTag; |
| |
| /** |
| * Creates a new {@link TimingsTraceAndSlog} for async operations. |
| */ |
| @NonNull |
| public static TimingsTraceAndSlog newAsyncLog() { |
| return new TimingsTraceAndSlog(SYSTEM_SERVER_TIMING_ASYNC_TAG, |
| Trace.TRACE_TAG_SYSTEM_SERVER); |
| } |
| |
| /** |
| * Default constructor using {@code system_server} tags. |
| */ |
| public TimingsTraceAndSlog() { |
| this(SYSTEM_SERVER_TIMING_TAG); |
| } |
| |
| /** |
| * Custom constructor using {@code system_server} trace tag. |
| * |
| * @param tag {@code logcat} tag |
| */ |
| public TimingsTraceAndSlog(@NonNull String tag) { |
| this(tag, Trace.TRACE_TAG_SYSTEM_SERVER); |
| } |
| |
| /** |
| * Custom constructor. |
| * |
| * @param tag {@code logcat} tag |
| * @param traceTag {@code atrace} tag |
| */ |
| public TimingsTraceAndSlog(@NonNull String tag, long traceTag) { |
| super(tag, traceTag); |
| mTag = tag; |
| } |
| |
| @Override |
| public void traceBegin(@NonNull String name) { |
| Slog.i(mTag, name); |
| super.traceBegin(name); |
| } |
| |
| @Override |
| public void logDuration(String name, long timeMs) { |
| super.logDuration(name, timeMs); |
| if (BOTTLENECK_DURATION_MS > 0 && timeMs >= BOTTLENECK_DURATION_MS) { |
| Slog.w(mTag, "Slow duration for " + name + ": " + timeMs + "ms"); |
| } |
| } |
| |
| @Override |
| public String toString() { |
| return "TimingsTraceAndSlog[" + mTag + "]"; |
| } |
| } |