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.
|
29 */ 30 31#include "base/timebuf.hh" 32#include "cpu/activity.hh" 33 34ActivityRecorder::ActivityRecorder(int num_stages, int longest_latency, 35 int activity) 36 : activityBuffer(longest_latency, 0), longestLatency(longest_latency), 37 activityCount(activity), numStages(num_stages) 38{ 39 stageActive = new bool[numStages]; 40 memset(stageActive, 0, numStages); 41} 42 43void 44ActivityRecorder::activity() 45{ 46 // If we've already recorded activity for this cycle, we don't 47 // want to increment the count any more. 48 if (activityBuffer[0]) { 49 return; 50 } 51 52 activityBuffer[0] = true; 53 54 ++activityCount; 55 56 DPRINTF(Activity, "Activity: %i\n", activityCount); 57} 58 59void 60ActivityRecorder::advance() 61{ 62 // If there's a 1 in the slot that is about to be erased once the 63 // time buffer advances, then decrement the activityCount. 64 if (activityBuffer[-longestLatency]) { 65 --activityCount; 66 67 assert(activityCount >= 0); 68 69 DPRINTF(Activity, "Activity: %i\n", activityCount); 70 71 if (activityCount == 0) { 72 DPRINTF(Activity, "No activity left!\n"); 73 } 74 } 75 76 activityBuffer.advance(); 77} 78 79void 80ActivityRecorder::activateStage(const int idx) 81{ 82 // Increment the activity count if this stage wasn't already active. 83 if (!stageActive[idx]) { 84 ++activityCount; 85 86 stageActive[idx] = true; 87 88 DPRINTF(Activity, "Activity: %i\n", activityCount); 89 } else { 90 DPRINTF(Activity, "Stage %i already active.\n", idx); 91 } 92 93// assert(activityCount < longestLatency + numStages + 1); 94} 95 96void 97ActivityRecorder::deactivateStage(const int idx) 98{ 99 // Decrement the activity count if this stage was active. 100 if (stageActive[idx]) { 101 --activityCount; 102 103 stageActive[idx] = false; 104 105 DPRINTF(Activity, "Activity: %i\n", activityCount); 106 } else { 107 DPRINTF(Activity, "Stage %i already inactive.\n", idx); 108 } 109 110 assert(activityCount >= 0); 111} 112 113void 114ActivityRecorder::reset() 115{ 116 activityCount = 0; 117 memset(stageActive, 0, numStages); 118 for (int i = 0; i < longestLatency + 1; ++i) 119 activityBuffer.advance(); 120} 121 122void 123ActivityRecorder::dump() 124{ 125 for (int i = 0; i <= longestLatency; ++i) { 126 cprintf("[Idx:%i %i] ", i, activityBuffer[-i]); 127 } 128 129 cprintf("\n"); 130 131 for (int i = 0; i < numStages; ++i) { 132 cprintf("[Stage:%i %i]\n", i, stageActive[i]); 133 } 134 135 cprintf("\n"); 136 137 cprintf("Activity count: %i\n", activityCount); 138} 139 140void 141ActivityRecorder::validate() 142{ 143 int count = 0; 144 for (int i = 0; i <= longestLatency; ++i) { 145 if (activityBuffer[-i]) { 146 count++; 147 } 148 } 149 150 for (int i = 0; i < numStages; ++i) { 151 if (stageActive[i]) { 152 count++; 153 } 154 } 155 156 assert(count == activityCount); 157}
|