activity.cc revision 3918
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 <cstring> 32 33#include "base/timebuf.hh" 34#include "cpu/activity.hh" 35 36ActivityRecorder::ActivityRecorder(int num_stages, int longest_latency, 37 int activity) 38 : activityBuffer(longest_latency, 0), longestLatency(longest_latency), 39 activityCount(activity), numStages(num_stages) 40{ 41 stageActive = new bool[numStages]; 42 std::memset(stageActive, 0, numStages); 43} 44 45void 46ActivityRecorder::activity() 47{ 48 // If we've already recorded activity for this cycle, we don't 49 // want to increment the count any more. 50 if (activityBuffer[0]) { 51 return; 52 } 53 54 activityBuffer[0] = true; 55 56 ++activityCount; 57 58 DPRINTF(Activity, "Activity: %i\n", activityCount); 59} 60 61void 62ActivityRecorder::advance() 63{ 64 // If there's a 1 in the slot that is about to be erased once the 65 // time buffer advances, then decrement the activityCount. 66 if (activityBuffer[-longestLatency]) { 67 --activityCount; 68 69 assert(activityCount >= 0); 70 71 DPRINTF(Activity, "Activity: %i\n", activityCount); 72 73 if (activityCount == 0) { 74 DPRINTF(Activity, "No activity left!\n"); 75 } 76 } 77 78 activityBuffer.advance(); 79} 80 81void 82ActivityRecorder::activateStage(const int idx) 83{ 84 // Increment the activity count if this stage wasn't already active. 85 if (!stageActive[idx]) { 86 ++activityCount; 87 88 stageActive[idx] = true; 89 90 DPRINTF(Activity, "Activity: %i\n", activityCount); 91 } else { 92 DPRINTF(Activity, "Stage %i already active.\n", idx); 93 } 94 95// assert(activityCount < longestLatency + numStages + 1); 96} 97 98void 99ActivityRecorder::deactivateStage(const int idx) 100{ 101 // Decrement the activity count if this stage was active. 102 if (stageActive[idx]) { 103 --activityCount; 104 105 stageActive[idx] = false; 106 107 DPRINTF(Activity, "Activity: %i\n", activityCount); 108 } else { 109 DPRINTF(Activity, "Stage %i already inactive.\n", idx); 110 } 111 112 assert(activityCount >= 0); 113} 114 115void 116ActivityRecorder::reset() 117{ 118 activityCount = 0; 119 std::memset(stageActive, 0, numStages); 120 for (int i = 0; i < longestLatency + 1; ++i) 121 activityBuffer.advance(); 122} 123 124void 125ActivityRecorder::dump() 126{ 127 for (int i = 0; i <= longestLatency; ++i) { 128 cprintf("[Idx:%i %i] ", i, activityBuffer[-i]); 129 } 130 131 cprintf("\n"); 132 133 for (int i = 0; i < numStages; ++i) { 134 cprintf("[Stage:%i %i]\n", i, stageActive[i]); 135 } 136 137 cprintf("\n"); 138 139 cprintf("Activity count: %i\n", activityCount); 140} 141 142void 143ActivityRecorder::validate() 144{ 145 int count = 0; 146 for (int i = 0; i <= longestLatency; ++i) { 147 if (activityBuffer[-i]) { 148 count++; 149 } 150 } 151 152 for (int i = 0; i < numStages; ++i) { 153 if (stageActive[i]) { 154 count++; 155 } 156 } 157 158 assert(count == activityCount); 159} 160