112396SRiken.Gohil@arm.com/* 212396SRiken.Gohil@arm.com * Copyright (c) 2012-2013, 2016-2017 ARM Limited 312396SRiken.Gohil@arm.com * All rights reserved 412396SRiken.Gohil@arm.com * 512396SRiken.Gohil@arm.com * The license below extends only to copyright in the software and shall 612396SRiken.Gohil@arm.com * not be construed as granting a license to any other intellectual 712396SRiken.Gohil@arm.com * property including but not limited to intellectual property relating 812396SRiken.Gohil@arm.com * to a hardware implementation of the functionality of the software 912396SRiken.Gohil@arm.com * licensed here under. You may use the software subject to the license 1012396SRiken.Gohil@arm.com * terms below provided that you ensure that this notice is replicated 1112396SRiken.Gohil@arm.com * unmodified and in its entirety in all distributions of the software, 1212396SRiken.Gohil@arm.com * modified or unmodified, in source code or in binary form. 1312396SRiken.Gohil@arm.com * 1412396SRiken.Gohil@arm.com * Redistribution and use in source and binary forms, with or without 1512396SRiken.Gohil@arm.com * modification, are permitted provided that the following conditions are 1612396SRiken.Gohil@arm.com * met: redistributions of source code must retain the above copyright 1712396SRiken.Gohil@arm.com * notice, this list of conditions and the following disclaimer; 1812396SRiken.Gohil@arm.com * redistributions in binary form must reproduce the above copyright 1912396SRiken.Gohil@arm.com * notice, this list of conditions and the following disclaimer in the 2012396SRiken.Gohil@arm.com * documentation and/or other materials provided with the distribution; 2112396SRiken.Gohil@arm.com * neither the name of the copyright holders nor the names of its 2212396SRiken.Gohil@arm.com * contributors may be used to endorse or promote products derived from 2312396SRiken.Gohil@arm.com * this software without specific prior written permission. 2412396SRiken.Gohil@arm.com * 2512396SRiken.Gohil@arm.com * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 2612396SRiken.Gohil@arm.com * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 2712396SRiken.Gohil@arm.com * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 2812396SRiken.Gohil@arm.com * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 2912396SRiken.Gohil@arm.com * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 3012396SRiken.Gohil@arm.com * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 3112396SRiken.Gohil@arm.com * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 3212396SRiken.Gohil@arm.com * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 3312396SRiken.Gohil@arm.com * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 3412396SRiken.Gohil@arm.com * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 3512396SRiken.Gohil@arm.com * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 3612396SRiken.Gohil@arm.com * 3712396SRiken.Gohil@arm.com * Authors: Thomas Grass 3812396SRiken.Gohil@arm.com * Andreas Hansson 3912396SRiken.Gohil@arm.com * Sascha Bischoff 4012396SRiken.Gohil@arm.com * Neha Agarwal 4112396SRiken.Gohil@arm.com */ 4212396SRiken.Gohil@arm.com 4312396SRiken.Gohil@arm.com#include "cpu/testers/traffic_gen/random_gen.hh" 4412396SRiken.Gohil@arm.com 4512396SRiken.Gohil@arm.com#include <algorithm> 4612396SRiken.Gohil@arm.com 4712396SRiken.Gohil@arm.com#include "base/random.hh" 4812396SRiken.Gohil@arm.com#include "base/trace.hh" 4912396SRiken.Gohil@arm.com#include "debug/TrafficGen.hh" 5012396SRiken.Gohil@arm.com 5112396SRiken.Gohil@arm.comvoid 5212396SRiken.Gohil@arm.comRandomGen::enter() 5312396SRiken.Gohil@arm.com{ 5412396SRiken.Gohil@arm.com // reset the counter to zero 5512396SRiken.Gohil@arm.com dataManipulated = 0; 5612396SRiken.Gohil@arm.com} 5712396SRiken.Gohil@arm.com 5812396SRiken.Gohil@arm.comPacketPtr 5912396SRiken.Gohil@arm.comRandomGen::getNextPacket() 6012396SRiken.Gohil@arm.com{ 6112396SRiken.Gohil@arm.com // choose if we generate a read or a write here 6212396SRiken.Gohil@arm.com bool isRead = readPercent != 0 && 6312396SRiken.Gohil@arm.com (readPercent == 100 || random_mt.random(0, 100) < readPercent); 6412396SRiken.Gohil@arm.com 6512396SRiken.Gohil@arm.com assert((readPercent == 0 && !isRead) || (readPercent == 100 && isRead) || 6612396SRiken.Gohil@arm.com readPercent != 100); 6712396SRiken.Gohil@arm.com 6812396SRiken.Gohil@arm.com // address of the request 6912396SRiken.Gohil@arm.com Addr addr = random_mt.random(startAddr, endAddr - 1); 7012396SRiken.Gohil@arm.com 7112396SRiken.Gohil@arm.com // round down to start address of block 7212396SRiken.Gohil@arm.com addr -= addr % blocksize; 7312396SRiken.Gohil@arm.com 7412396SRiken.Gohil@arm.com DPRINTF(TrafficGen, "RandomGen::getNextPacket: %c to addr %x, size %d\n", 7512396SRiken.Gohil@arm.com isRead ? 'r' : 'w', addr, blocksize); 7612396SRiken.Gohil@arm.com 7712396SRiken.Gohil@arm.com // add the amount of data manipulated to the total 7812396SRiken.Gohil@arm.com dataManipulated += blocksize; 7912396SRiken.Gohil@arm.com 8012396SRiken.Gohil@arm.com // create a new request packet 8112396SRiken.Gohil@arm.com return getPacket(addr, blocksize, 8212396SRiken.Gohil@arm.com isRead ? MemCmd::ReadReq : MemCmd::WriteReq); 8312396SRiken.Gohil@arm.com} 8412396SRiken.Gohil@arm.com 8512396SRiken.Gohil@arm.comTick 8612396SRiken.Gohil@arm.comRandomGen::nextPacketTick(bool elastic, Tick delay) const 8712396SRiken.Gohil@arm.com{ 8812396SRiken.Gohil@arm.com // Check to see if we have reached the data limit. If dataLimit is 8912396SRiken.Gohil@arm.com // zero we do not have a data limit and therefore we will keep 9012396SRiken.Gohil@arm.com // generating requests for the entire residency in this state. 9112396SRiken.Gohil@arm.com if (dataLimit && dataManipulated >= dataLimit) 9212396SRiken.Gohil@arm.com { 9312396SRiken.Gohil@arm.com DPRINTF(TrafficGen, "Data limit for RandomGen reached.\n"); 9412396SRiken.Gohil@arm.com // No more requests. Return MaxTick. 9512396SRiken.Gohil@arm.com return MaxTick; 9612396SRiken.Gohil@arm.com } else { 9712396SRiken.Gohil@arm.com // return the time when the next request should take place 9812396SRiken.Gohil@arm.com Tick wait = random_mt.random(minPeriod, maxPeriod); 9912396SRiken.Gohil@arm.com 10012396SRiken.Gohil@arm.com // compensate for the delay experienced to not be elastic, by 10112396SRiken.Gohil@arm.com // default the value we generate is from the time we are 10212396SRiken.Gohil@arm.com // asked, so the elasticity happens automatically 10312396SRiken.Gohil@arm.com if (!elastic) { 10412396SRiken.Gohil@arm.com if (wait < delay) 10512396SRiken.Gohil@arm.com wait = 0; 10612396SRiken.Gohil@arm.com else 10712396SRiken.Gohil@arm.com wait -= delay; 10812396SRiken.Gohil@arm.com } 10912396SRiken.Gohil@arm.com 11012396SRiken.Gohil@arm.com return curTick() + wait; 11112396SRiken.Gohil@arm.com } 11212396SRiken.Gohil@arm.com} 113