1/*
2 * Copyright (c) 2006 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Authors: Kevin Lim
29 */
30
31#include <string>
32
33#include "cpu/activity.hh"
34#include "cpu/timebuf.hh"
35#include "debug/Activity.hh"
36
37using namespace std;
38
39ActivityRecorder::ActivityRecorder(const string &name, int num_stages,
40 int longest_latency, int activity)
41 : _name(name), activityBuffer(longest_latency, 0),
42 longestLatency(longest_latency), activityCount(activity),
43 numStages(num_stages)
44{
45 stageActive = new bool[numStages];
46 std::memset(stageActive, 0, numStages);
47}
48
49ActivityRecorder::~ActivityRecorder()
50{
51 delete[] stageActive;
52}
53
54void
55ActivityRecorder::activity()
56{
57 // If we've already recorded activity for this cycle, we don't
58 // want to increment the count any more.
59 if (activityBuffer[0]) {
60 return;
61 }
62
63 activityBuffer[0] = true;
64
65 ++activityCount;
66
67 DPRINTF(Activity, "Activity: %i\n", activityCount);
68}
69
70void
71ActivityRecorder::advance()
72{
73 // If there's a 1 in the slot that is about to be erased once the
74 // time buffer advances, then decrement the activityCount.
75 if (activityBuffer[-longestLatency]) {
76 --activityCount;
77
78 assert(activityCount >= 0);
79
80 DPRINTF(Activity, "Activity: %i\n", activityCount);
81
82 if (activityCount == 0) {
83 DPRINTF(Activity, "No activity left!\n");
84 }
85 }
86
87 activityBuffer.advance();
88}
89
90void
91ActivityRecorder::activateStage(const int idx)
92{
93 // Increment the activity count if this stage wasn't already active.
94 if (!stageActive[idx]) {
95 ++activityCount;
96
97 stageActive[idx] = true;
98
99 DPRINTF(Activity, "Activity: %i\n", activityCount);
100 } else {
101 DPRINTF(Activity, "Stage %i already active.\n", idx);
102 }
103
104// assert(activityCount < longestLatency + numStages + 1);
105}
106
107void
108ActivityRecorder::deactivateStage(const int idx)
109{
110 // Decrement the activity count if this stage was active.
111 if (stageActive[idx]) {
112 --activityCount;
113
114 stageActive[idx] = false;
115
116 DPRINTF(Activity, "Activity: %i\n", activityCount);
117 } else {
118 DPRINTF(Activity, "Stage %i already inactive.\n", idx);
119 }
120
121 assert(activityCount >= 0);
122}
123
124void
125ActivityRecorder::reset()
126{
127 activityCount = 0;
128 std::memset(stageActive, 0, numStages);
129 for (int i = 0; i < longestLatency + 1; ++i)
130 activityBuffer.advance();
131}
132
133void
134ActivityRecorder::dump()
135{
136 for (int i = 0; i <= longestLatency; ++i) {
137 cprintf("[Idx:%i %i] ", i, activityBuffer[-i]);
138 }
139
140 cprintf("\n");
141
142 for (int i = 0; i < numStages; ++i) {
143 cprintf("[Stage:%i %i]\n", i, stageActive[i]);
144 }
145
146 cprintf("\n");
147
148 cprintf("Activity count: %i\n", activityCount);
149}
150
151void
152ActivityRecorder::validate()
153{
154 int count = 0;
155 for (int i = 0; i <= longestLatency; ++i) {
156 if (activityBuffer[-i]) {
157 count++;
158 }
159 }
160
161 for (int i = 0; i < numStages; ++i) {
162 if (stageActive[i]) {
163 count++;
164 }
165 }
166
167 assert(count == activityCount);
168}