Generalized trace test added. Can be useful for profiling.

1 files changed, 79 insertions, 0 deletions

diff --git a/lttng/org.eclipse.linuxtools.ctf.core.tests/src/org/eclipse/linuxtools/ctf/core/tests/headless/ReadTrace.java b/lttng/org.eclipse.linuxtools.ctf.core.tests/src/org/eclipse/linuxtools/ctf/core/tests/headless/ReadTrace.java
new file mode 100644
index 0000000..a6b5aff
--- a/dev/null
+++ b/lttng/org.eclipse.linuxtools.ctf.core.tests/src/org/eclipse/linuxtools/ctf/core/tests/headless/ReadTrace.java
@@ -0,0 +1,79 @@
+/*******************************************************************************
+ * Copyright (c) 2012 Ericsson
+ *
+ * All rights reserved. This program and the accompanying materials are
+ * made available under the terms of the Eclipse Public License v1.0 which
+ * accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *   Matthew Khouzam - Initial API and implementation
+ *******************************************************************************/
+
+package org.eclipse.linuxtools.ctf.core.tests.headless;
+
+import java.text.DateFormat;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+
+import org.eclipse.linuxtools.ctf.core.event.EventDefinition;
+import org.eclipse.linuxtools.ctf.core.trace.CTFReaderException;
+import org.eclipse.linuxtools.ctf.core.trace.CTFTrace;
+import org.eclipse.linuxtools.ctf.core.trace.CTFTraceReader;
+
+public class ReadTrace {
+
+    /**
+     * @param args
+     */
+    @SuppressWarnings("nls")
+    public static void main(String[] args) {
+        final String TRACE_PATH = "Tests/traces/trace20m";
+
+        // Change this to enable text output
+        final boolean USE_TEXT = false;
+
+        // Work variables
+        Long nbEvent = 0L;
+        CTFTrace trace = null;
+        try {
+            trace = new CTFTrace(TRACE_PATH);
+        } catch (CTFReaderException e) {
+
+            nbEvent = (long) -1;
+        }
+        long start, stop;
+        start = System.nanoTime();
+        if (nbEvent != -1) {
+            CTFTraceReader traceReader = new CTFTraceReader(trace);
+
+            start = System.nanoTime();
+            while (traceReader.hasMoreEvents()) {
+                EventDefinition ed = traceReader.getCurrentEventDef();
+                nbEvent++;
+                if (USE_TEXT) {
+                    String output = formatDate(ed.timestamp + trace.getOffset());
+                    System.out.println("Event " + nbEvent + " Time " + output
+                            + " type " + ed.getDeclaration().getName()
+                            + " on CPU " + ed.getCPU());
+                }
+                traceReader.advance();
+            }
+        }
+        stop = System.nanoTime();
+        System.out.println("Time taken for " + nbEvent + " " + (stop - start)
+                + "ns ");
+        System.out.println(((stop - start) / nbEvent) + "ns/event ");
+    }
+
+    /**
+     * @param timestamp the timestamp in UTC to convert to nanoseconds.
+     * @return formatted string.
+     */
+    private static String formatDate(long timestamp) {
+        Date d = new Date(timestamp / 1000000);
+        DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss."); //$NON-NLS-1$
+        String output = df.format(d) + (timestamp % 1000000000);
+        return output;
+    }
+}