1 /*
2 * Copyright (c) 2015, 2016, 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. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
25
26 package com.sun.marlin.stats;
27
28 /**
29 * Generic histogram based on long statistics
30 */
31 public final class Histogram extends StatLong {
32
33 static final int BUCKET = 2;
34 static final int MAX = 20;
35 static final int LAST = MAX - 1;
36 static final int[] STEPS = new int[MAX];
37
38 static {
39 STEPS[0] = 0;
40 STEPS[1] = 1;
41
42 for (int i = 2; i < MAX; i++) {
43 STEPS[i] = STEPS[i - 1] * BUCKET;
44 }
45 // System.out.println("Histogram.STEPS = " + Arrays.toString(STEPS));
46 }
47
48 static int bucket(int val) {
49 for (int i = 1; i < MAX; i++) {
50 if (val < STEPS[i]) {
51 return i - 1;
52 }
53 }
54 return LAST;
55 }
56
57 private final StatLong[] stats = new StatLong[MAX];
58
59 public Histogram(final String name) {
60 super(name);
61 for (int i = 0; i < MAX; i++) {
62 stats[i] = new StatLong(String.format("%5s .. %5s", STEPS[i],
63 ((i + 1 < MAX) ? STEPS[i + 1] : "~")));
64 }
65 }
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1 /*
2 * Copyright (c) 2015, 2018, 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. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
25
26 package com.sun.marlin.stats;
27
28 /**
29 * Generic histogram based on long statistics
30 */
31 public final class Histogram extends StatLong {
32
33 static final int BUCKET = 2;
34 static final int MAX = 20;
35 static final int LAST = MAX - 1;
36 static final int[] STEPS = new int[MAX];
37
38 static {
39 STEPS[0] = 0;
40 STEPS[1] = 1;
41
42 for (int i = 2; i < MAX; i++) {
43 STEPS[i] = STEPS[i - 1] * BUCKET;
44 }
45 }
46
47 static int bucket(int val) {
48 for (int i = 1; i < MAX; i++) {
49 if (val < STEPS[i]) {
50 return i - 1;
51 }
52 }
53 return LAST;
54 }
55
56 private final StatLong[] stats = new StatLong[MAX];
57
58 public Histogram(final String name) {
59 super(name);
60 for (int i = 0; i < MAX; i++) {
61 stats[i] = new StatLong(String.format("%5s .. %5s", STEPS[i],
62 ((i + 1 < MAX) ? STEPS[i + 1] : "~")));
63 }
64 }
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