1 /*
   2  * Copyright (c) 2018, 2019, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 package jdk.test.lib.containers.cgroup;
  25 
  26 import java.io.File;
  27 import java.io.FileNotFoundException;
  28 import java.io.IOException;
  29 import java.math.BigInteger;
  30 import java.nio.file.Files;
  31 import java.nio.file.Path;
  32 import java.nio.file.Paths;
  33 import java.util.Arrays;
  34 import java.util.HashMap;
  35 import java.util.HashSet;
  36 import java.util.Map;
  37 import java.util.Scanner;
  38 import java.util.Set;
  39 import java.util.stream.Collectors;
  40 import java.util.stream.IntStream;
  41 import java.util.stream.LongStream;
  42 import java.util.stream.Stream;
  43 import jdk.internal.platform.Metrics;
  44 
  45 public class MetricsTester {
  46 
  47     private static final double ERROR_MARGIN = 0.1;
  48     private static long unlimited_minimum = 0x7FFFFFFFFF000000L;
  49     long startSysVal;
  50     long startUserVal;
  51     long startUsage;
  52     long startPerCpu[];
  53 
  54     enum SubSystem {
  55         MEMORY("memory"),
  56         CPUSET("cpuset"),
  57         CPU("cpu"),
  58         CPUACCT("cpuacct"),
  59         BLKIO("blkio");
  60 
  61         private String value;
  62 
  63         SubSystem(String value) {
  64             this.value = value;
  65         }
  66 
  67         public String value() {
  68             return value;
  69         }
  70     }
  71 
  72     private static final Set<String> allowedSubSystems =
  73             Stream.of(SubSystem.values()).map(SubSystem::value).collect(Collectors.toSet());
  74 
  75     private static final Map<String, String[]> subSystemPaths = new HashMap<>();
  76 
  77     private static void setPath(String[] line) {
  78         String cgroupPath = line[2];
  79         String[] subSystems = line[1].split(",");
  80 
  81         for (String subSystem : subSystems) {
  82             if (allowedSubSystems.contains(subSystem)) {
  83                 String[] paths = subSystemPaths.get(subSystem);
  84                 String finalPath = "";
  85                 String root = paths[0];
  86                 String mountPoint = paths[1];
  87                 if (root != null && cgroupPath != null) {
  88                     if (root.equals("/")) {
  89                         if (!cgroupPath.equals("/")) {
  90                             finalPath = mountPoint + cgroupPath;
  91                         } else {
  92                             finalPath = mountPoint;
  93                         }
  94                     } else {
  95                         if (root.equals(cgroupPath)) {
  96                             finalPath = mountPoint;
  97                         } else {
  98                             if (cgroupPath.startsWith(root)) {
  99                                 if (cgroupPath.length() > root.length()) {
 100                                     String cgroupSubstr = cgroupPath.substring(root.length());
 101                                     finalPath = mountPoint + cgroupSubstr;
 102                                 }
 103                             }
 104                         }
 105                     }
 106                 }
 107                 subSystemPaths.put(subSystem, new String[]{finalPath, mountPoint});
 108             }
 109         }
 110     }
 111 
 112     private static void createSubsystems(String[] line) {
 113         if (line.length < 5) return;
 114         Path p = Paths.get(line[4]);
 115         String subsystemName = p.getFileName().toString();
 116         if (subsystemName != null) {
 117             for (String subSystem : subsystemName.split(",")) {
 118                 if (allowedSubSystems.contains(subSystem)) {
 119                     subSystemPaths.put(subSystem, new String[]{line[3], line[4]});
 120                 }
 121             }
 122         }
 123     }
 124 
 125     public void setup() {
 126         Metrics metrics = Metrics.systemMetrics();
 127         // Initialize CPU usage metrics before we do any testing.
 128         startSysVal = metrics.getCpuSystemUsage();
 129         startUserVal = metrics.getCpuUserUsage();
 130         startUsage = metrics.getCpuUsage();
 131         startPerCpu = metrics.getPerCpuUsage();
 132 
 133         try {
 134             Stream<String> lines = Files.lines(Paths.get("/proc/self/mountinfo"));
 135             lines.filter(line -> line.contains(" - cgroup cgroup "))
 136                     .map(line -> line.split(" "))
 137                     .forEach(MetricsTester::createSubsystems);
 138             lines.close();
 139 
 140             lines = Files.lines(Paths.get("/proc/self/cgroup"));
 141             lines.map(line -> line.split(":"))
 142                     .filter(line -> (line.length >= 3))
 143                     .forEach(MetricsTester::setPath);
 144             lines.close();
 145         } catch (IOException e) {
 146         }
 147     }
 148 
 149     private static String getFileContents(SubSystem subSystem, String fileName) {
 150         String fname = subSystemPaths.get(subSystem.value())[0] + File.separator + fileName;
 151         try {
 152             return new Scanner(new File(fname)).useDelimiter("\\Z").next();
 153         } catch (FileNotFoundException e) {
 154             System.err.println("Unable to open : " + fname);
 155             return "";
 156         }
 157     }
 158 
 159     private static long getLongValueFromFile(SubSystem subSystem, String fileName) {
 160         String data = getFileContents(subSystem, fileName);
 161         return data.isEmpty() ? 0L : convertStringToLong(data);
 162     }
 163 
 164     private static long convertStringToLong(String strval) {
 165         long retval = 0;
 166         if (strval == null) return 0L;
 167 
 168         try {
 169             retval = Long.parseLong(strval);
 170         } catch (NumberFormatException e) {
 171             // For some properties (e.g. memory.limit_in_bytes) we may overflow the range of signed long.
 172             // In this case, return Long.MAX_VALUE
 173             BigInteger b = new BigInteger(strval);
 174             if (b.compareTo(BigInteger.valueOf(Long.MAX_VALUE)) > 0) {
 175                 return Long.MAX_VALUE;
 176             }
 177         }
 178         return retval;
 179     }
 180 
 181     private static long getLongValueFromFile(SubSystem subSystem, String metric, String subMetric) {
 182         String stats = getFileContents(subSystem, metric);
 183         String[] tokens = stats.split("[\\r\\n]+");
 184         for (int i = 0; i < tokens.length; i++) {
 185             if (tokens[i].startsWith(subMetric)) {
 186                 String strval = tokens[i].split("\\s+")[1];
 187                 return convertStringToLong(strval);
 188             }
 189         }
 190         return 0L;
 191     }
 192 
 193     private static double getDoubleValueFromFile(SubSystem subSystem, String fileName) {
 194         String data = getFileContents(subSystem, fileName);
 195         return data.isEmpty() ? 0.0 : Double.parseDouble(data);
 196     }
 197 
 198     private boolean compareWithErrorMargin(long oldVal, long newVal) {
 199         return Math.abs(oldVal - newVal) <= Math.abs(oldVal * ERROR_MARGIN);
 200     }
 201 
 202     private boolean compareWithErrorMargin(double oldVal, double newVal) {
 203         return Math.abs(oldVal - newVal) <= Math.abs(oldVal * ERROR_MARGIN);
 204     }
 205 
 206     private static void fail(SubSystem system, String metric, long oldVal, long testVal) {
 207         throw new RuntimeException("Test failed for - " + system.value + ":"
 208                 + metric + ", expected [" + oldVal + "], got [" + testVal + "]");
 209     }
 210 
 211     private static void fail(SubSystem system, String metric, String oldVal, String testVal) {
 212         throw new RuntimeException("Test failed for - " + system.value + ":"
 213                 + metric + ", expected [" + oldVal + "], got [" + testVal + "]");
 214     }
 215 
 216     private static void fail(SubSystem system, String metric, double oldVal, double testVal) {
 217         throw new RuntimeException("Test failed for - " + system.value + ":"
 218                 + metric + ", expected [" + oldVal + "], got [" + testVal + "]");
 219     }
 220 
 221     private static void fail(SubSystem system, String metric, boolean oldVal, boolean testVal) {
 222         throw new RuntimeException("Test failed for - " + system.value + ":"
 223                 + metric + ", expected [" + oldVal + "], got [" + testVal + "]");
 224     }
 225 
 226     private static void warn(SubSystem system, String metric, long oldVal, long testVal) {
 227         System.err.println("Warning - " + system.value + ":" + metric
 228                 + ", expected [" + oldVal + "], got [" + testVal + "]");
 229     }
 230 
 231     public void testMemorySubsystem() {
 232         Metrics metrics = Metrics.systemMetrics();
 233 
 234         // User Memory
 235         long oldVal = metrics.getMemoryFailCount();
 236         long newVal = getLongValueFromFile(SubSystem.MEMORY, "memory.failcnt");
 237         if (!compareWithErrorMargin(oldVal, newVal)) {
 238             fail(SubSystem.MEMORY, "memory.failcnt", oldVal, newVal);
 239         }
 240 
 241         oldVal = metrics.getMemoryLimit();
 242         newVal = getLongValueFromFile(SubSystem.MEMORY, "memory.limit_in_bytes");
 243         newVal = newVal > unlimited_minimum ? -1L : newVal;
 244         if (!compareWithErrorMargin(oldVal, newVal)) {
 245             fail(SubSystem.MEMORY, "memory.limit_in_bytes", oldVal, newVal);
 246         }
 247 
 248         oldVal = metrics.getMemoryMaxUsage();
 249         newVal = getLongValueFromFile(SubSystem.MEMORY, "memory.max_usage_in_bytes");
 250         if (!compareWithErrorMargin(oldVal, newVal)) {
 251             fail(SubSystem.MEMORY, "memory.max_usage_in_bytes", oldVal, newVal);
 252         }
 253 
 254         oldVal = metrics.getMemoryUsage();
 255         newVal = getLongValueFromFile(SubSystem.MEMORY, "memory.usage_in_bytes");
 256         if (!compareWithErrorMargin(oldVal, newVal)) {
 257             fail(SubSystem.MEMORY, "memory.usage_in_bytes", oldVal, newVal);
 258         }
 259 
 260         // Kernel memory
 261         oldVal = metrics.getKernelMemoryFailCount();
 262         newVal = getLongValueFromFile(SubSystem.MEMORY, "memory.kmem.failcnt");
 263         if (!compareWithErrorMargin(oldVal, newVal)) {
 264             fail(SubSystem.MEMORY, "memory.kmem.failcnt", oldVal, newVal);
 265         }
 266 
 267         oldVal = metrics.getKernelMemoryLimit();
 268         newVal = getLongValueFromFile(SubSystem.MEMORY, "memory.kmem.limit_in_bytes");
 269         newVal = newVal > unlimited_minimum ? -1L : newVal;
 270         if (!compareWithErrorMargin(oldVal, newVal)) {
 271             fail(SubSystem.MEMORY, "memory.kmem.limit_in_bytes", oldVal, newVal);
 272         }
 273 
 274         oldVal = metrics.getKernelMemoryMaxUsage();
 275         newVal = getLongValueFromFile(SubSystem.MEMORY, "memory.kmem.max_usage_in_bytes");
 276         if (!compareWithErrorMargin(oldVal, newVal)) {
 277             fail(SubSystem.MEMORY, "memory.kmem.max_usage_in_bytes", oldVal, newVal);
 278         }
 279 
 280         oldVal = metrics.getKernelMemoryUsage();
 281         newVal = getLongValueFromFile(SubSystem.MEMORY, "memory.kmem.usage_in_bytes");
 282         if (!compareWithErrorMargin(oldVal, newVal)) {
 283             fail(SubSystem.MEMORY, "memory.kmem.usage_in_bytes", oldVal, newVal);
 284         }
 285 
 286         //TCP Memory
 287         oldVal = metrics.getTcpMemoryFailCount();
 288         newVal = getLongValueFromFile(SubSystem.MEMORY, "memory.kmem.tcp.failcnt");
 289         if (!compareWithErrorMargin(oldVal, newVal)) {
 290             fail(SubSystem.MEMORY, "memory.kmem.tcp.failcnt", oldVal, newVal);
 291         }
 292 
 293         oldVal = metrics.getTcpMemoryLimit();
 294         newVal = getLongValueFromFile(SubSystem.MEMORY, "memory.kmem.tcp.limit_in_bytes");
 295         newVal = newVal > unlimited_minimum ? -1L : newVal;
 296         if (!compareWithErrorMargin(oldVal, newVal)) {
 297             fail(SubSystem.MEMORY, "memory.kmem.tcp.limit_in_bytes", oldVal, newVal);
 298         }
 299 
 300         oldVal = metrics.getTcpMemoryMaxUsage();
 301         newVal = getLongValueFromFile(SubSystem.MEMORY, "memory.kmem.tcp.max_usage_in_bytes");
 302         if (!compareWithErrorMargin(oldVal, newVal)) {
 303             fail(SubSystem.MEMORY, "memory.kmem.tcp.max_usage_in_bytes", oldVal, newVal);
 304         }
 305 
 306         oldVal = metrics.getTcpMemoryUsage();
 307         newVal = getLongValueFromFile(SubSystem.MEMORY, "memory.kmem.tcp.usage_in_bytes");
 308         if (!compareWithErrorMargin(oldVal, newVal)) {
 309             fail(SubSystem.MEMORY, "memory.kmem.tcp.usage_in_bytes", oldVal, newVal);
 310         }
 311 
 312         //  Memory and Swap
 313         oldVal = metrics.getMemoryAndSwapFailCount();
 314         newVal = getLongValueFromFile(SubSystem.MEMORY, "memory.memsw.failcnt");
 315         if (!compareWithErrorMargin(oldVal, newVal)) {
 316             fail(SubSystem.MEMORY, "memory.memsw.failcnt", oldVal, newVal);
 317         }
 318 
 319         oldVal = metrics.getMemoryAndSwapLimit();
 320         newVal = getLongValueFromFile(SubSystem.MEMORY, "memory.memsw.limit_in_bytes");
 321         newVal = newVal > unlimited_minimum ? -1L : newVal;
 322         if (!compareWithErrorMargin(oldVal, newVal)) {
 323             fail(SubSystem.MEMORY, "memory.memsw.limit_in_bytes", oldVal, newVal);
 324         }
 325 
 326         oldVal = metrics.getMemoryAndSwapMaxUsage();
 327         newVal = getLongValueFromFile(SubSystem.MEMORY, "memory.memsw.max_usage_in_bytes");
 328         if (!compareWithErrorMargin(oldVal, newVal)) {
 329             fail(SubSystem.MEMORY, "memory.memsw.max_usage_in_bytes", oldVal, newVal);
 330         }
 331 
 332         oldVal = metrics.getMemoryAndSwapUsage();
 333         newVal = getLongValueFromFile(SubSystem.MEMORY, "memory.memsw.usage_in_bytes");
 334         if (!compareWithErrorMargin(oldVal, newVal)) {
 335             fail(SubSystem.MEMORY, "memory.memsw.usage_in_bytes", oldVal, newVal);
 336         }
 337 
 338         oldVal = metrics.getMemorySoftLimit();
 339         newVal = getLongValueFromFile(SubSystem.MEMORY, "memory.soft_limit_in_bytes");
 340         newVal = newVal > unlimited_minimum ? -1L : newVal;
 341         if (!compareWithErrorMargin(oldVal, newVal)) {
 342             fail(SubSystem.MEMORY, "memory.soft_limit_in_bytes", oldVal, newVal);
 343         }
 344 
 345         boolean oomKillEnabled = metrics.isMemoryOOMKillEnabled();
 346         boolean newOomKillEnabled = getLongValueFromFile(SubSystem.MEMORY,
 347                 "memory.oom_control", "oom_kill_disable") == 0L ? true : false;
 348         if (oomKillEnabled != newOomKillEnabled) {
 349             throw new RuntimeException("Test failed for - " + SubSystem.MEMORY.value + ":"
 350                     + "memory.oom_control:oom_kill_disable" + ", expected ["
 351                     + oomKillEnabled + "], got [" + newOomKillEnabled + "]");
 352         }
 353     }
 354 
 355     public void testCpuAccounting() {
 356         Metrics metrics = Metrics.systemMetrics();
 357         long oldVal = metrics.getCpuUsage();
 358         long newVal = getLongValueFromFile(SubSystem.CPUACCT, "cpuacct.usage");
 359 
 360         if (!compareWithErrorMargin(oldVal, newVal)) {
 361             warn(SubSystem.CPUACCT, "cpuacct.usage", oldVal, newVal);
 362         }
 363 
 364         Long[] newVals = Stream.of(getFileContents(SubSystem.CPUACCT, "cpuacct.usage_percpu")
 365                 .split("\\s+"))
 366                 .map(Long::parseLong)
 367                 .toArray(Long[]::new);
 368         Long[] oldVals = LongStream.of(metrics.getPerCpuUsage()).boxed().toArray(Long[]::new);
 369         for (int i = 0; i < oldVals.length; i++) {
 370             if (!compareWithErrorMargin(oldVals[i], newVals[i])) {
 371                 warn(SubSystem.CPUACCT, "cpuacct.usage_percpu", oldVals[i], newVals[i]);
 372             }
 373         }
 374 
 375         oldVal = metrics.getCpuUserUsage();
 376         newVal = getLongValueFromFile(SubSystem.CPUACCT, "cpuacct.stat", "user");
 377         if (!compareWithErrorMargin(oldVal, newVal)) {
 378             warn(SubSystem.CPUACCT, "cpuacct.usage - user", oldVal, newVal);
 379         }
 380 
 381         oldVal = metrics.getCpuSystemUsage();
 382         newVal = getLongValueFromFile(SubSystem.CPUACCT, "cpuacct.stat", "system");
 383         if (!compareWithErrorMargin(oldVal, newVal)) {
 384             warn(SubSystem.CPUACCT, "cpuacct.usage - system", oldVal, newVal);
 385         }
 386     }
 387 
 388     public void testCpuSchedulingMetrics() {
 389         Metrics metrics = Metrics.systemMetrics();
 390         long oldVal = metrics.getCpuPeriod();
 391         long newVal = getLongValueFromFile(SubSystem.CPUACCT, "cpu.cfs_period_us");
 392         if (!compareWithErrorMargin(oldVal, newVal)) {
 393             fail(SubSystem.CPUACCT, "cpu.cfs_period_us", oldVal, newVal);
 394         }
 395 
 396         oldVal = metrics.getCpuQuota();
 397         newVal = getLongValueFromFile(SubSystem.CPUACCT, "cpu.cfs_quota_us");
 398         if (!compareWithErrorMargin(oldVal, newVal)) {
 399             fail(SubSystem.CPUACCT, "cpu.cfs_quota_us", oldVal, newVal);
 400         }
 401 
 402         oldVal = metrics.getCpuShares();
 403         newVal = getLongValueFromFile(SubSystem.CPUACCT, "cpu.shares");
 404         if (newVal == 0 || newVal == 1024) newVal = -1;
 405         if (!compareWithErrorMargin(oldVal, newVal)) {
 406             fail(SubSystem.CPUACCT, "cpu.shares", oldVal, newVal);
 407         }
 408 
 409         oldVal = metrics.getCpuNumPeriods();
 410         newVal = getLongValueFromFile(SubSystem.CPUACCT, "cpu.stat", "nr_periods");
 411         if (!compareWithErrorMargin(oldVal, newVal)) {
 412             fail(SubSystem.CPUACCT, "cpu.stat - nr_periods", oldVal, newVal);
 413         }
 414 
 415         oldVal = metrics.getCpuNumThrottled();
 416         newVal = getLongValueFromFile(SubSystem.CPUACCT, "cpu.stat", "nr_throttled");
 417         if (!compareWithErrorMargin(oldVal, newVal)) {
 418             fail(SubSystem.CPUACCT, "cpu.stat - nr_throttled", oldVal, newVal);
 419         }
 420 
 421         oldVal = metrics.getCpuThrottledTime();
 422         newVal = getLongValueFromFile(SubSystem.CPUACCT, "cpu.stat", "throttled_time");
 423         if (!compareWithErrorMargin(oldVal, newVal)) {
 424             fail(SubSystem.CPUACCT, "cpu.stat - throttled_time", oldVal, newVal);
 425         }
 426     }
 427 
 428     public void testCpuSets() {
 429         Metrics metrics = Metrics.systemMetrics();
 430         Integer[] oldVal = Arrays.stream(metrics.getCpuSetCpus()).boxed().toArray(Integer[]::new);
 431         Arrays.sort(oldVal);
 432 
 433         String cpusstr = getFileContents(SubSystem.CPUSET, "cpuset.cpus");
 434         // Parse range string in the format 1,2-6,7
 435         Integer[] newVal = Stream.of(cpusstr.split(",")).flatMap(a -> {
 436             if (a.contains("-")) {
 437                 String[] range = a.split("-");
 438                 return IntStream.rangeClosed(Integer.parseInt(range[0]),
 439                         Integer.parseInt(range[1])).boxed();
 440             } else {
 441                 return Stream.of(Integer.parseInt(a));
 442             }
 443         }).toArray(Integer[]::new);
 444         Arrays.sort(newVal);
 445         if (Arrays.compare(oldVal, newVal) != 0) {
 446             fail(SubSystem.CPUSET, "cpuset.cpus", Arrays.toString(oldVal),
 447                 Arrays.toString(newVal));
 448         }
 449 
 450         int [] cpuSets = metrics.getEffectiveCpuSetCpus();
 451 
 452         // Skip this test if this metric is supported on this platform
 453         if (cpuSets.length != 0) {
 454             oldVal = Arrays.stream(cpuSets).boxed().toArray(Integer[]::new);
 455             Arrays.sort(oldVal);
 456             cpusstr = getFileContents(SubSystem.CPUSET, "cpuset.effective_cpus");
 457             newVal = Stream.of(cpusstr.split(",")).flatMap(a -> {
 458                 if (a.contains("-")) {
 459                     String[] range = a.split("-");
 460                     return IntStream.rangeClosed(Integer.parseInt(range[0]),
 461                             Integer.parseInt(range[1])).boxed();
 462                 } else {
 463                     return Stream.of(Integer.parseInt(a));
 464                 }
 465             }).toArray(Integer[]::new);
 466             Arrays.sort(newVal);
 467             if (Arrays.compare(oldVal, newVal) != 0) {
 468                 fail(SubSystem.CPUSET, "cpuset.effective_cpus", Arrays.toString(oldVal),
 469                         Arrays.toString(newVal));
 470             }
 471         }
 472 
 473         oldVal = Arrays.stream(metrics.getCpuSetMems()).boxed().toArray(Integer[]::new);
 474         Arrays.sort(oldVal);
 475         cpusstr = getFileContents(SubSystem.CPUSET, "cpuset.mems");
 476         newVal = Stream.of(cpusstr.split(",")).flatMap(a -> {
 477             if (a.contains("-")) {
 478                 String[] range = a.split("-");
 479                 return IntStream.rangeClosed(Integer.parseInt(range[0]),
 480                         Integer.parseInt(range[1])).boxed();
 481             } else {
 482                 return Stream.of(Integer.parseInt(a));
 483             }
 484         }).toArray(Integer[]::new);
 485         Arrays.sort(newVal);
 486         if (Arrays.compare(oldVal, newVal) != 0) {
 487             fail(SubSystem.CPUSET, "cpuset.mems", Arrays.toString(oldVal),
 488                     Arrays.toString(newVal));
 489         }
 490 
 491         int [] cpuSetMems = metrics.getEffectiveCpuSetMems();
 492 
 493         // Skip this test if this metric is supported on this platform
 494         if (cpuSetMems.length != 0) {
 495             oldVal = Arrays.stream(cpuSetMems).boxed().toArray(Integer[]::new);
 496             Arrays.sort(oldVal);
 497             cpusstr = getFileContents(SubSystem.CPUSET, "cpuset.effective_mems");
 498             newVal = Stream.of(cpusstr.split(",")).flatMap(a -> {
 499                 if (a.contains("-")) {
 500                     String[] range = a.split("-");
 501                     return IntStream.rangeClosed(Integer.parseInt(range[0]),
 502                             Integer.parseInt(range[1])).boxed();
 503                 } else {
 504                     return Stream.of(Integer.parseInt(a));
 505                 }
 506             }).toArray(Integer[]::new);
 507             Arrays.sort(newVal);
 508             if (Arrays.compare(oldVal, newVal) != 0) {
 509                 fail(SubSystem.CPUSET, "cpuset.effective_mems", Arrays.toString(oldVal),
 510                         Arrays.toString(newVal));
 511             }
 512         }
 513 
 514         double oldValue = metrics.getCpuSetMemoryPressure();
 515         double newValue = getDoubleValueFromFile(SubSystem.CPUSET, "cpuset.memory_pressure");
 516         if (!compareWithErrorMargin(oldValue, newValue)) {
 517             fail(SubSystem.CPUSET, "cpuset.memory_pressure", oldValue, newValue);
 518         }
 519 
 520         boolean oldV = metrics.isCpuSetMemoryPressureEnabled();
 521         boolean newV = getLongValueFromFile(SubSystem.CPUSET,
 522                 "cpuset.memory_pressure_enabled") == 1 ? true : false;
 523         if (oldV != newV) {
 524             fail(SubSystem.CPUSET, "cpuset.memory_pressure_enabled", oldV, newV);
 525         }
 526     }
 527 
 528     public void testBlkIO() {
 529         Metrics metrics = Metrics.systemMetrics();
 530             long oldVal = metrics.getBlkIOServiceCount();
 531         long newVal = getLongValueFromFile(SubSystem.BLKIO,
 532                 "blkio.throttle.io_service_bytes", "Total");
 533         if (!compareWithErrorMargin(oldVal, newVal)) {
 534             fail(SubSystem.BLKIO, "blkio.throttle.io_service_bytes - Total",
 535                     oldVal, newVal);
 536         }
 537 
 538         oldVal = metrics.getBlkIOServiced();
 539         newVal = getLongValueFromFile(SubSystem.BLKIO, "blkio.throttle.io_serviced", "Total");
 540         if (!compareWithErrorMargin(oldVal, newVal)) {
 541             fail(SubSystem.BLKIO, "blkio.throttle.io_serviced - Total", oldVal, newVal);
 542         }
 543     }
 544 
 545     public void testCpuConsumption() throws IOException, InterruptedException {
 546         Metrics metrics = Metrics.systemMetrics();
 547         // make system call
 548         long newSysVal = metrics.getCpuSystemUsage();
 549         long newUserVal = metrics.getCpuUserUsage();
 550         long newUsage = metrics.getCpuUsage();
 551         long[] newPerCpu = metrics.getPerCpuUsage();
 552 
 553         // system/user CPU usage counters may be slowly increasing.
 554         // allow for equal values for a pass
 555         if (newSysVal < startSysVal) {
 556             fail(SubSystem.CPU, "getCpuSystemUsage", newSysVal, startSysVal);
 557         }
 558 
 559         // system/user CPU usage counters may be slowly increasing.
 560         // allow for equal values for a pass
 561         if (newUserVal < startUserVal) {
 562             fail(SubSystem.CPU, "getCpuUserUsage", newUserVal, startUserVal);
 563         }
 564 
 565         if (newUsage <= startUsage) {
 566             fail(SubSystem.CPU, "getCpuUsage", newUsage, startUsage);
 567         }
 568 
 569         boolean success = false;
 570         for (int i = 0; i < startPerCpu.length; i++) {
 571             if (newPerCpu[i] > startPerCpu[i]) {
 572                 success = true;
 573                 break;
 574             }
 575         }
 576 
 577         if(!success) fail(SubSystem.CPU, "getPerCpuUsage", Arrays.toString(newPerCpu),
 578                 Arrays.toString(startPerCpu));
 579     }
 580 
 581     public void testMemoryUsage() throws Exception {
 582         Metrics metrics = Metrics.systemMetrics();
 583         long memoryMaxUsage = metrics.getMemoryMaxUsage();
 584         long memoryUsage = metrics.getMemoryUsage();
 585         long newMemoryMaxUsage = 0, newMemoryUsage = 0;
 586 
 587         // allocate memory in a loop and check more than once for new values
 588         // otherwise we might see seldom the effect of decreasing new memory values
 589         // e.g. because the system could free up memory
 590         byte[][] bytes = new byte[32][];
 591         for (int i = 0; i < 32; i++) {
 592             bytes[i] = new byte[8*1024*1024];
 593             newMemoryUsage = metrics.getMemoryUsage();
 594             if (newMemoryUsage > memoryUsage) {
 595                 break;
 596             }
 597         }
 598         newMemoryMaxUsage = metrics.getMemoryMaxUsage();
 599 
 600         if (newMemoryMaxUsage < memoryMaxUsage) {
 601             fail(SubSystem.MEMORY, "getMemoryMaxUsage", memoryMaxUsage,
 602                     newMemoryMaxUsage);
 603         }
 604 
 605         if (newMemoryUsage < memoryUsage) {
 606             fail(SubSystem.MEMORY, "getMemoryUsage", memoryUsage, newMemoryUsage);
 607         }
 608     }
 609 
 610     public static void main(String[] args) throws Exception {
 611         // If cgroups is not configured, report success
 612         Metrics metrics = Metrics.systemMetrics();
 613         if (metrics == null) {
 614             System.out.println("TEST PASSED!!!");
 615             return;
 616         }
 617 
 618         MetricsTester metricsTester = new MetricsTester();
 619         metricsTester.setup();
 620         metricsTester.testCpuAccounting();
 621         metricsTester.testCpuSchedulingMetrics();
 622         metricsTester.testCpuSets();
 623         metricsTester.testMemorySubsystem();
 624         metricsTester.testBlkIO();
 625         metricsTester.testCpuConsumption();
 626         metricsTester.testMemoryUsage();
 627         System.out.println("TEST PASSED!!!");
 628     }
 629 }