1 /*******************************************************************************
2 * Copyright (c) 2012, 2014 Ericsson
4 * All rights reserved. This program and the accompanying materials are
5 * made available under the terms of the Eclipse Public License v1.0 which
6 * accompanies this distribution, and is available at
7 * http://www.eclipse.org/legal/epl-v10.html
10 * Matthew Khouzam - Initial API and implementation
11 * Alexandre Montplaisir - Convert to a org.eclipse.test.performance test
12 *******************************************************************************/
14 package org
.eclipse
.linuxtools
.ctf
.core
.tests
.perf
.trace
;
16 import static org
.junit
.Assert
.fail
;
17 import static org
.junit
.Assume
.assumeTrue
;
19 import java
.util
.LinkedList
;
20 import java
.util
.List
;
21 import java
.util
.Random
;
23 import org
.eclipse
.linuxtools
.ctf
.core
.event
.EventDefinition
;
24 import org
.eclipse
.linuxtools
.ctf
.core
.tests
.shared
.CtfTestTrace
;
25 import org
.eclipse
.linuxtools
.ctf
.core
.trace
.CTFReaderException
;
26 import org
.eclipse
.linuxtools
.ctf
.core
.trace
.CTFTrace
;
27 import org
.eclipse
.linuxtools
.ctf
.core
.trace
.CTFTraceReader
;
28 import org
.eclipse
.test
.performance
.Dimension
;
29 import org
.eclipse
.test
.performance
.Performance
;
30 import org
.eclipse
.test
.performance
.PerformanceMeter
;
31 import org
.junit
.Test
;
34 * Tests for performance regressions of the ctf reader. It only tests the ctf
37 * This test runs in 3 passes.
39 * <li>first it opens a trace</li>
40 * <li>then it reads the trace completely</li>
41 * <li>then it randomly (seeded) seeks NB_SEEKS locations in the trace and reads one
42 * event at each position.</li>
45 * @author Matthew Khouzam
46 * @author Alexandre Montplaisir
48 public class TraceSeekBenchmark
{
50 private static final Random RND
= new Random(1000);
52 private static final int LOOP_COUNT
= 25;
53 private static final int NB_SEEKS
= 500;
54 private static final String TEST_SUITE_NAME
= "CTF Read & Seek Benchmark (" + NB_SEEKS
+ " seeks)";
55 private static final String TEST_ID
= "org.eclipse.linuxtools#" + TEST_SUITE_NAME
;
58 * Run the benchmark scenario for the trace "kernel"
61 public void testKernelTrace() {
62 readAndSeekTrace(CtfTestTrace
.KERNEL
, "trace-kernel", true);
65 private static void readAndSeekTrace(CtfTestTrace testTrace
, String testName
, boolean inGlobalSummary
) {
66 assumeTrue(testTrace
.exists());
68 Performance perf
= Performance
.getDefault();
69 PerformanceMeter pm
= perf
.createPerformanceMeter(TEST_ID
+ '#' + testName
);
70 perf
.tagAsSummary(pm
, TEST_SUITE_NAME
+ ':' + testName
, Dimension
.CPU_TIME
);
72 if (inGlobalSummary
) {
73 perf
.tagAsGlobalSummary(pm
, TEST_SUITE_NAME
+ ':' + testName
, Dimension
.CPU_TIME
);
76 for (int loop
= 0; loop
< LOOP_COUNT
; loop
++) {
77 try (CTFTrace trace
= testTrace
.getTrace();
78 CTFTraceReader traceReader
= new CTFTraceReader(trace
);) {
80 /* Read the whole trace to find out the start and end times */
81 EventDefinition firstEvent
= traceReader
.getCurrentEventDef();
82 final long startTime
= firstEvent
.getTimestamp();
83 long endTime
= startTime
;
84 while (traceReader
.hasMoreEvents()) {
85 EventDefinition ev
= traceReader
.getCurrentEventDef();
86 endTime
= ev
.getTimestamp();
87 traceReader
.advance();
90 /* Generate the timestamps we will seek to */
91 List
<Long
> seekTimestamps
= new LinkedList
<>();
92 final long range
= endTime
- startTime
;
93 for (int i
= 0; i
< NB_SEEKS
; i
++) {
94 long delta
= (RND
.nextLong() % range
);
98 seekTimestamps
.add(startTime
+ delta
);
101 /* Benchmark seeking to the generated timestamps */
103 for (Long ts
: seekTimestamps
) {
104 traceReader
.seek(ts
);
105 traceReader
.advance();
109 } catch (CTFReaderException e
) {
110 /* Should not happen if assumeTrue() passed above */
111 fail("Test failed at iteration " + loop
+ ':' + e
.getMessage());