changeset 48369:08b8cc40cb61

8193509: Test dynamic path to retrieve active processor count. Reviewed-by: dholmes, mdoerr
author goetz
date Thu, 14 Dec 2017 12:57:21 +0100
parents f82e79958beb
children 7969cc1b94ee
files test/hotspot/jtreg/runtime/os/TestUseCpuAllocPath.java
diffstat 1 files changed, 53 insertions(+), 0 deletions(-) [+]
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/runtime/os/TestUseCpuAllocPath.java	Thu Dec 14 12:57:21 2017 +0100
@@ -0,0 +1,53 @@
+/*
+ * 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 jdk.test.lib.process.ProcessTools;
+import jdk.test.lib.process.OutputAnalyzer;
+
+/**
+ * @test
+ * @summary If #processors > 1024 os_linux.cpp uses special coding.
+ *   Excercise this by forcing usage of this coding. If this fails, this
+ *   VM was either compiled on a platform which does not define CPU_ALLOC,
+ *   or it is executed on a platform that does not support it.
+ * @requires os.family == "linux"
+ * @modules java.base/jdk.internal.misc
+ * @library /test/lib
+ * @run driver TestUseCpuAllocPath
+ */
+public class TestUseCpuAllocPath {
+
+    static final String SUCCESS_STRING = "active_processor_count: using dynamic path (forced)";
+
+    public static void main(String[] args) throws Exception {
+        ProcessBuilder pb =
+            ProcessTools.createJavaProcessBuilder(false,
+                                                  "-Xlog:os=trace",
+                                                  "-XX:+UnlockDiagnosticVMOptions",
+                                                  "-XX:+UseCpuAllocPath",
+                                                  "-version");
+
+        OutputAnalyzer output = new OutputAnalyzer(pb.start());
+        output.shouldContain(SUCCESS_STRING);
+    }
+}