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 "cpu/activity.hh"
32
33#include <string>
34
35#include "cpu/timebuf.hh"
36#include "debug/Activity.hh"
37
38using namespace std;
39
40ActivityRecorder::ActivityRecorder(const string &name, int num_stages,
41 int longest_latency, int activity)
42 : _name(name), activityBuffer(longest_latency, 0),
43 longestLatency(longest_latency), activityCount(activity),
44 numStages(num_stages)
45{
46 stageActive = new bool[numStages];
47 std::memset(stageActive, 0, numStages);
48}
49
50ActivityRecorder::~ActivityRecorder()
51{
52 delete[] stageActive;
53}
54
55void
56ActivityRecorder::activity()
57{
58 // If we've already recorded activity for this cycle, we don't
59 // want to increment the count any more.
60 if (activityBuffer[0]) {
61 return;
62 }
63
64 activityBuffer[0] = true;
65
66 ++activityCount;
67
68 DPRINTF(Activity, "Activity: %i\n", activityCount);
69}
70
71void
72ActivityRecorder::advance()
73{
74 // If there's a 1 in the slot that is about to be erased once the
75 // time buffer advances, then decrement the activityCount.
76 if (activityBuffer[-longestLatency]) {
77 --activityCount;
78
79 assert(activityCount >= 0);
80
81 DPRINTF(Activity, "Activity: %i\n", activityCount);
82
83 if (activityCount == 0) {
84 DPRINTF(Activity, "No activity left!\n");
85 }
86 }
87
88 activityBuffer.advance();
89}
90
91void
92ActivityRecorder::activateStage(const int idx)
93{
94 // Increment the activity count if this stage wasn't already active.
95 if (!stageActive[idx]) {
96 ++activityCount;
97
98 stageActive[idx] = true;
99
100 DPRINTF(Activity, "Activity: %i\n", activityCount);
101 } else {
102 DPRINTF(Activity, "Stage %i already active.\n", idx);
103 }
104
105// assert(activityCount < longestLatency + numStages + 1);
106}
107
108void
109ActivityRecorder::deactivateStage(const int idx)
110{
111 // Decrement the activity count if this stage was active.
112 if (stageActive[idx]) {
113 --activityCount;
114
115 stageActive[idx] = false;
116
117 DPRINTF(Activity, "Activity: %i\n", activityCount);
118 } else {
119 DPRINTF(Activity, "Stage %i already inactive.\n", idx);
120 }
121
122 assert(activityCount >= 0);
123}
124
125void
126ActivityRecorder::reset()
127{
128 activityCount = 0;
129 std::memset(stageActive, 0, numStages);
130 for (int i = 0; i < longestLatency + 1; ++i)
131 activityBuffer.advance();
132}
133
134void
135ActivityRecorder::dump()
136{
137 for (int i = 0; i <= longestLatency; ++i) {
138 cprintf("[Idx:%i %i] ", i, activityBuffer[-i]);
139 }
140
141 cprintf("\n");
142
143 for (int i = 0; i < numStages; ++i) {
144 cprintf("[Stage:%i %i]\n", i, stageActive[i]);
145 }
146
147 cprintf("\n");
148
149 cprintf("Activity count: %i\n", activityCount);
150}
151
152void
153ActivityRecorder::validate()
154{
155 int count = 0;
156 for (int i = 0; i <= longestLatency; ++i) {
157 if (activityBuffer[-i]) {
158 count++;
159 }
160 }
161
162 for (int i = 0; i < numStages; ++i) {
163 if (stageActive[i]) {
164 count++;
165 }
166 }
167
168 assert(count == activityCount);
169}