--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/runtime/containers/docker/CPUSetsReader.java	Thu Nov 16 19:01:01 2017 -0800
@@ -0,0 +1,141 @@
+/*
+ * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.io.FileReader;
+import java.util.ArrayList;
+import java.util.Optional;
+import java.util.List;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+import jdk.test.lib.Asserts;
+
+
+// A simple CPU sets reader and parser
+public class CPUSetsReader {
+    public static String PROC_SELF_STATUS_PATH="/proc/self/status";
+
+    // Test the parser
+    public static void test() {
+        assertParse("0-7", "0,1,2,3,4,5,6,7");
+        assertParse("1,3,6", "1,3,6");
+        assertParse("0,2-4,6,10-11", "0,2,3,4,6,10,11");
+        assertParse("0", "0");
+    }
+
+
+    private static void assertParse(String cpuSet, String expectedResult) {
+        Asserts.assertEquals(listToString(parseCpuSet(cpuSet)), expectedResult);
+    }
+
+
+    public static String readFromProcStatus(String setType) {
+        String path = PROC_SELF_STATUS_PATH;
+        Optional<String> o = Optional.empty();
+
+        System.out.println("readFromProcStatus() entering for: " + setType);
+
+        try (Stream<String> stream = Files.lines(Paths.get(path))) {
+            o = stream
+                .filter(line -> line.contains(setType))
+                .findFirst();
+        } catch (IOException e) {
+            return null;
+        }
+
+        if (!o.isPresent()) {
+            return null;    // entry not found
+        }
+
+        String[] parts = o.get().replaceAll("\\s","").split(":");
+
+        // Should be 2 parts, before and after ":"
+        Asserts.assertEquals(parts.length, 2);
+
+        String result = parts[1];
+        System.out.println("readFromProcStatus() returning: " + result);
+        return result;
+    }
+
+
+    public static List<Integer> parseCpuSet(String value) {
+        ArrayList<Integer> result = new ArrayList<Integer>();
+
+        try {
+            String[] commaSeparated = value.split(",");
+
+            for (String item : commaSeparated) {
+                if (item.contains("-")) {
+                    addRange(result, item);
+                } else {
+                    result.add(Integer.parseInt(item));
+                }
+            }
+        } catch (Exception e) {
+            System.err.println("Exception in getMaxCpuSets(): " + e);
+            return null;
+        }
+
+        return result;
+    }
+
+
+    private static void addRange(ArrayList<Integer> list, String s) {
+        String[] range = s.split("-");
+        if ( range.length != 2 ) {
+            throw new RuntimeException("Range should only contain two items, but contains "
+                                       + range.length + " items");
+        }
+
+        int min = Integer.parseInt(range[0]);
+        int max = Integer.parseInt(range[1]);
+
+        if (min >= max) {
+            String msg = String.format("min is greater or equals to max, min = %d, max = %d",
+                                       min, max);
+            throw new RuntimeException(msg);
+        }
+
+        for (int i = min; i <= max; i++) {
+            list.add(i);
+        }
+    }
+
+
+    // Convert list of integers to string with comma-separated values
+    public static String listToString(List<Integer> list) {
+        return listToString(list, Integer.MAX_VALUE);
+    }
+
+    // Convert list of integers to a string with comma-separated values;
+    // include up to maxCount.
+    public static String listToString(List<Integer> list, int maxCount) {
+        return list.stream()
+            .limit(maxCount)
+            .map(Object::toString)
+            .collect(Collectors.joining(","));
+    }
+}