| // Copyright 2022 The Bazel Authors. All rights reserved. |
| // |
| // 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.google.devtools.build.lib.profiler; |
| |
| import static java.nio.charset.StandardCharsets.UTF_8; |
| |
| import com.google.auto.value.AutoValue; |
| import com.google.common.base.Splitter; |
| import com.google.devtools.build.lib.jni.JniLoader; |
| import com.google.devtools.build.lib.util.OS; |
| import java.io.IOException; |
| import java.nio.file.Files; |
| import java.nio.file.Paths; |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| |
| /** Utility class for query system network stats. */ |
| public class SystemNetworkStats { |
| private static final Splitter SPLITTER = Splitter.on(" ").omitEmptyStrings().trimResults(); |
| |
| static { |
| JniLoader.loadJni(); |
| } |
| |
| private SystemNetworkStats() {} |
| |
| /** Value class for network IO counters. */ |
| @AutoValue |
| public abstract static class NetIoCounter { |
| public static NetIoCounter create( |
| long bytesSent, long bytesRecv, long packetsSent, long packetsRecv) { |
| return new AutoValue_SystemNetworkStats_NetIoCounter( |
| bytesSent, bytesRecv, packetsSent, packetsRecv); |
| } |
| |
| // Number of bytes sent. |
| public abstract long bytesSent(); |
| // Number of bytes received. |
| public abstract long bytesRecv(); |
| // Number of packets sent. |
| public abstract long packetsSent(); |
| // Number of packets received. |
| public abstract long packetsRecv(); |
| } |
| |
| public static Map<String, NetIoCounter> getNetIoCounters() throws IOException { |
| Map<String, NetIoCounter> counters = new HashMap<>(); |
| switch (OS.getCurrent()) { |
| case LINUX: |
| getNetIoCountersLinux(counters); |
| break; |
| default: |
| getNetIoCountersNative(counters); |
| } |
| return counters; |
| } |
| |
| private static void getNetIoCountersLinux(Map<String, NetIoCounter> counters) throws IOException { |
| List<String> lines = Files.readAllLines(Paths.get("/proc/net/dev"), UTF_8); |
| |
| // skip table header (first 2 lines) |
| for (String line : lines.subList(2, lines.size())) { |
| int colonAt = line.indexOf(':'); |
| if (colonAt < 0) { |
| continue; |
| } |
| String name = line.substring(0, colonAt).strip(); |
| long[] fields = |
| SPLITTER.splitToStream(line.substring(colonAt + 1)).mapToLong(Long::parseLong).toArray(); |
| if (fields.length > 9) { |
| long bytesRecv = fields[0]; |
| long packetsRecv = fields[1]; |
| long bytesSent = fields[8]; |
| long packetsSent = fields[9]; |
| counters.put(name, NetIoCounter.create(bytesSent, bytesRecv, packetsSent, packetsRecv)); |
| } |
| } |
| } |
| |
| /** Value class for network interface address. */ |
| @AutoValue |
| public abstract static class NetIfAddr { |
| /** Address family for the address. */ |
| public enum Family { |
| AF_INET, |
| AF_INET6, |
| UNKNOWN, |
| } |
| |
| public static NetIfAddr create(String name, Family family, String ipAddr) { |
| return new AutoValue_SystemNetworkStats_NetIfAddr(name, family, ipAddr); |
| } |
| |
| // Name of the interface. |
| public abstract String name(); |
| |
| public abstract Family family(); |
| |
| // IP address for this interface if the family is AF_INET or AF_INET6. |
| public abstract String ipAddr(); |
| } |
| |
| public static Map<String, List<NetIfAddr>> getNetIfAddrs() throws IOException { |
| List<NetIfAddr> addrs = new ArrayList<>(); |
| getNetIfAddrsNative(addrs); |
| |
| Map<String, List<NetIfAddr>> result = new HashMap<>(); |
| for (NetIfAddr addr : addrs) { |
| result.computeIfAbsent(addr.name(), ignored -> new ArrayList<>()).add(addr); |
| } |
| return result; |
| } |
| |
| private static native void getNetIoCountersNative(Map<String, NetIoCounter> countersOut) |
| throws IOException; |
| |
| private static native void getNetIfAddrsNative(List<NetIfAddr> addrsOut) throws IOException; |
| } |