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Thermal simulation period adjustment mechanism implemented.

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This commit is contained in:
Éder F. Zulian
2015-10-02 17:33:10 +02:00
parent 43b576dffa
commit 63eae4d1ee
7 changed files with 193 additions and 106 deletions
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35
DRAMSys/simulator/resources/configs/temperature_sim/power_thresholds.xml
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@@ -1,8 +1,33 @@
<power_thresholds>
<cpu id="0" value="1.0" />
<cpu id="1" value="2.0" />
<gpu id="0" value="2.0" />
<dram id="2" value="5.0" />
<dram id="3" value="1.0" />
<!-- TODO Maybe change this file format -->
<CPUs id="0" value="1.0" />
<GPU id="1" value="1.0" />
<BASEBAND1 id="2" value="1.0" />
<BASEBAND2 id="3" value="1.0" />
<LLCACHE id="4" value="1.0" />
<DRAMCTRL1 id="5" value="1.0" />
<DRAMCTRL2 id="6" value="1.0" />
<TSVs id="7" value="1.0" />
<ACELLERATORS id="8" value="1.0" />
<C0 id="9" value="1.0" />
<C1 id="10" value="1.0" />
<C2 id="11" value="1.0" />
<C3 id="12" value="1.0" />
<TSVs id="13" value="1.0" />
<C0 id="14" value="1.0" />
<C1 id="15" value="1.0" />
<C2 id="16" value="1.0" />
<C3 id="17" value="1.0" />
<TSVs id="18" value="1.0" />
<C0 id="19" value="1.0" />
<C1 id="20" value="1.0" />
<C2 id="21" value="1.0" />
<C3 id="22" value="1.0" />
<TSVs id="23" value="1.0" />
<C0 id="24" value="1.0" />
<C1 id="25" value="1.0" />
<C2 id="26" value="1.0" />
<C3 id="27" value="1.0" />
<TSVs id="28" value="1.0" />
</power_thresholds>

2
DRAMSys/simulator/src/controller/core/configuration/Configuration.cpp
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@@ -156,7 +156,7 @@ void Configuration::setParameter(std::string name, std::string value)
else if (name == "StaticTemperatureDefaultValue")
temperatureSim.StaticTemperatureDefaultValue = string2int(value);
else if (name == "DynTemperatureSimPeriod")
temperatureSim.DynTemperatureSimPeriod = string2int(value);
temperatureSim.DynTemperatureSimPeriod = std::stod(value.c_str());
else if (name == "DynTemperatureSimUnit")
temperatureSim.DynTemperatureSimUnit = string2TimeUnit(value);
else if (name == "PowerThresholdsFile") {

38
DRAMSys/simulator/src/controller/core/configuration/temperatureSimConfig.h
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@@ -51,15 +51,13 @@ struct TemperatureSimConfig {
int StaticTemperatureDefaultValue;
// Dynamic Temeperature Simulation parameters
unsigned int DynTemperatureSimPeriod;
double DynTemperatureSimPeriod;
enum sc_time_unit DynTemperatureSimUnit;
std::string IceServerIp;
unsigned int IceServerPort;
std::string powerThresholdsFile;
std::map<int, float> cpuPowerThresholds;
std::map<int, float> gpuPowerThresholds;
std::map<int, float> dramPowerThresholds;
std::vector<float> powerThresholds;
void parsePowerThresholdsFile()
{
@@ -68,9 +66,9 @@ struct TemperatureSimConfig {
// Load the XML file into memory and parse it
tinyxml2::XMLDocument xml;
loadXML(powerThresholdsFile, xml);
tinyxml2::XMLElement *powerThresholds = xml.FirstChildElement("power_thresholds");
tinyxml2::XMLElement *powThrElem = xml.FirstChildElement("power_thresholds");
if (powerThresholds == NULL) {
if (powThrElem == NULL) {
// Invalid file
std::string errormsg = "Invalid Power Thresholds File " + powerThresholdsFile;
printDebugMessage(errormsg);
@@ -78,24 +76,10 @@ struct TemperatureSimConfig {
throw;
}
for (tinyxml2::XMLElement *e = powerThresholds->FirstChildElement(); e != NULL; e = e->NextSiblingElement()) {
std::string id_str = e->Attribute("id");
for (tinyxml2::XMLElement *e = powThrElem->FirstChildElement(); e != NULL; e = e->NextSiblingElement()) {
std::string thr_str = e->Attribute("value");
int id = std::stoi(id_str);
float thr = std::stof(thr_str);
std::string name = e->Name();
if (name == "cpu") {
cpuPowerThresholds.insert(std::map<int, float>::value_type(id, thr));
} else if (name == "gpu") {
gpuPowerThresholds.insert(std::map<int, float>::value_type(id, thr));
} else if (name == "dram") {
dramPowerThresholds.insert(std::map<int, float>::value_type(id, thr));
} else {
printDebugMessage("Unknown element ignored: " + name);
}
powerThresholds.push_back(thr);
}
showTemperatureSimConfig();
@@ -103,12 +87,10 @@ struct TemperatureSimConfig {
void showTemperatureSimConfig()
{
for (auto e : cpuPowerThresholds)
printDebugMessage("CPU[" + std::to_string(e.first) + "] threshold: " + std::to_string(e.second));
for (auto e : gpuPowerThresholds)
printDebugMessage("GPU[" + std::to_string(e.first) + "] threshold: " + std::to_string(e.second));
for (auto e : dramPowerThresholds)
printDebugMessage("DRAM[" + std::to_string(e.first) + "] threshold: " + std::to_string(e.second));
int i = 0;
for (auto e : powerThresholds) {
printDebugMessage("powerThreshold[" + std::to_string(i++) + "]: " + std::to_string(e));
}
}
void printDebugMessage(std::string message)

2
DRAMSys/simulator/src/error/errormodel.cpp
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@@ -495,7 +495,7 @@ unsigned int errorModel::getBit(int row, int column, int byteInColumn, int bitIn
double errorModel::getTemperature()
{
double temperature = TemperatureController::getInstance().getTemperature();
double temperature = TemperatureController::getInstance().getTemperature(0, 0);
return temperature;
}

141
DRAMSys/simulator/src/simulation/TemperatureController.cpp
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@@ -34,77 +34,104 @@
* Matthias Jung
*/
#include <cmath>
#include "TemperatureController.h"
#include "../controller/core/configuration/Configuration.h"
void TemperatureController::setTemperature(double t)
double TemperatureController::getTemperature(int deviceId, float currentPower)
{
// XXX
// mutex for dynamic temperature simulation
temperature = t;
if (dynamicTempSimEnabled == true) {
// XXX do I need a mutex here?
currentPowerValues.at(deviceId) = currentPower;
return temperatureValues.at(deviceId);
} else {
printDebugMessage("Temperature is " + std::to_string(staticTemperature));
return staticTemperature;
}
}
double TemperatureController::getTemperature()
void TemperatureController::updateTemperatures()
{
printDebugMessage("Temperature is " + std::to_string(temperature));
return temperature;
thermalSimulation->sendPowerValues(&currentPowerValues);
thermalSimulation->simulate();
thermalSimulation->getTemperature(temperaturesBuffer, TDICE_OUTPUT_INSTANT_SLOT, TDICE_OUTPUT_TYPE_TCELL, TDICE_OUTPUT_QUANTITY_NONE);
// save values just obtained for posterior use
temperatureValues = temperaturesBuffer;
// clear the buffer, otherwise it will grow every request
temperaturesBuffer.clear();
}
double TemperatureController::adjustThermalSimPeriod()
{
// Temperature Simulation Period Dynamic Adjustment
//
// 1. Adjustment is requierd when:
//
// 1.1. The power dissipation of one or more devices change considerably
// (reaches the configured threshold for that device in any direction,
// i.e. increases or decreases substantially) during the current
// simulaiton period.
//
// 1.1.1. The simulation period will be reduced by a factor of 'n' so the
// simulation occurs 'n' times more often.
//
// 1.1.2. The step 1.1.1 will be repeated until the point that there are
// no sustantial changes in power dissipation between two consecutive
// executions of the thermal simulation, i.e. all changes for all devices
// are less than the configured threshold.
//
// 1.2. The current simulation period differs from the target period
// defined in the configuration by the user.
//
// 1.2.1 The situation period will be kept for a number of simulation
// executions 'ne' and after ne' the period will be increased again in
// steps of 'n/2' until it achieves the desired value given by
// configuration or the described in 1.1 occurs.
bool decreaseSimPeriod = false;
for (unsigned i = 0; i < currentPowerValues.size(); i++) {
if (std::abs(lastPowerValues.at(i) - currentPowerValues.at(i)) > powerThresholds.at(i)) {
cyclesSinceLastPeriodAdjust = 0;
decreaseSimPeriod = true;
}
}
lastPowerValues = currentPowerValues;
if (decreaseSimPeriod == true) {
period = period / periodAdjustFactor;
printDebugMessage("Thermal Simulation period reduced to " + std::to_string(period) + ". Target is " + std::to_string(targetPeriod));
} else {
if (period != targetPeriod) {
cyclesSinceLastPeriodAdjust++;
if (cyclesSinceLastPeriodAdjust >= nPowStableCyclesToIncreasePeriod) {
cyclesSinceLastPeriodAdjust = 0;
period = period * (periodAdjustFactor / 2);
printDebugMessage("Thermal Simulation period increased to " + std::to_string(period) + ". Target is " + std::to_string(targetPeriod));
if (period > targetPeriod)
period = targetPeriod;
}
}
}
return period;
}
void TemperatureController::temperatureThread()
{
unsigned int period = Configuration::getInstance().temperatureSim.DynTemperatureSimPeriod;
enum sc_time_unit t_unit = Configuration::getInstance().temperatureSim.DynTemperatureSimUnit;
std::vector<float> powerValues = {
0, // 1: CPUs
0, // 2: GPU
1, // 3: BASEBAND1
0, // 4: BASEBAND2
0, // 5: LLCACHE
0, // 6: DRAMCTRL1
0, // 7: DRAMCTRL2
0, // 8: TSVs
0, // 9: ACELLERATORS
1, //10: C0
0, //11: C1
0, //12: C2
0, //13: C3
0, //14: TSVs
0, //10: C0
0, //11: C1
0, //12: C2
0, //13: C3
0, //14: TSVs
0, //10: C0
0, //11: C1
0, //12: C2
0, //13: C3
0, //14: TSVs
0, //10: C0
0, //11: C1
0, //12: C2
0, //13: C3
0 //14: TSVs
};
while (true) {
std::vector<float> temperatureValues;
updateTemperatures();
double p = adjustThermalSimPeriod();
thermalSimulation->sendPowerValues(&powerValues);
int i = 0;
for (auto t : temperatureValues) {
printDebugMessage("Temperature[" + std::to_string(i++) + "] is " + std::to_string(t));
}
printDebugMessage("Thermal simulation period is " + std::to_string(p));
thermalSimulation->simulate();
thermalSimulation->getTemperature(temperatureValues, TDICE_OUTPUT_INSTANT_SLOT, TDICE_OUTPUT_TYPE_TCELL, TDICE_OUTPUT_QUANTITY_NONE);
for (auto t : temperatureValues)
printDebugMessage("Temperature is " + std::to_string(t));
// TODO
// store temperatures
// evaluate thresholds
// take a look in all the available getTemperature() options
wait(sc_time(period, t_unit));
wait(sc_time(p, t_unit));
}
}

79
DRAMSys/simulator/src/simulation/TemperatureController.h
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@@ -62,32 +62,85 @@ public:
std::string ip = Configuration::getInstance().temperatureSim.IceServerIp;
unsigned int port = Configuration::getInstance().temperatureSim.IceServerPort;
thermalSimulation = new IceWrapper(ip, port);
printDebugMessage("Dynamic temperature simulation. Server @ " + ip + ":" + std::to_string(port));
thermalSimulation = new IceWrapper(ip, port);
// get from config the initial power dissipation value
currentPowerValues = {
0, // 1: CPUs
0, // 2: GPU
1, // 3: BASEBAND1
0, // 4: BASEBAND2
0, // 5: LLCACHE
0, // 6: DRAMCTRL1
0, // 7: DRAMCTRL2
0, // 8: TSVs
0, // 9: ACELLERATORS
1, //10: C0
0, //11: C1
0, //12: C2
0, //13: C3
0, //14: TSVs
0, //10: C0
0, //11: C1
0, //12: C2
0, //13: C3
0, //14: TSVs
0, //10: C0
0, //11: C1
0, //12: C2
0, //13: C3
0, //14: TSVs
0, //10: C0
0, //11: C1
0, //12: C2
0, //13: C3
0 //14: TSVs
};
lastPowerValues = currentPowerValues;
powerThresholds = Configuration::getInstance().temperatureSim.powerThresholds;
periodAdjustFactor = 10;
nPowStableCyclesToIncreasePeriod = 5;
cyclesSinceLastPeriodAdjust = 0;
targetPeriod = Configuration::getInstance().temperatureSim.DynTemperatureSimPeriod;
period = targetPeriod;
t_unit = Configuration::getInstance().temperatureSim.DynTemperatureSimUnit;
SC_THREAD(temperatureThread);
} else {
double temperature = Configuration::getInstance().temperatureSim.StaticTemperatureDefaultValue;
setTemperature(temperature);
printDebugMessage("Static temperature simulation. Temperature set to " + std::to_string(temperature));
staticTemperature = Configuration::getInstance().temperatureSim.StaticTemperatureDefaultValue;
printDebugMessage("Static temperature simulation. Temperature set to " + std::to_string(staticTemperature));
}
}
// TODO
// Implement many signatures for getTemperature():
// - by (x,y,z) coordinates
// - device average temperature
double getTemperature();
double getTemperature(int deviceId, float currentPower);
private:
IceWrapper *thermalSimulation;
double temperature;
double staticTemperature;
bool dynamicTempSimEnabled;
void setTemperature(double t);
IceWrapper *thermalSimulation;
std::vector<float> temperaturesBuffer;
std::vector<float> temperatureValues;
std::vector<float> currentPowerValues;
std::vector<float> lastPowerValues;
std::vector<float> powerThresholds;
double targetPeriod;
double period;
enum sc_time_unit t_unit;
void temperatureThread();
void updateTemperatures();
double adjustThermalSimPeriod();
unsigned int periodAdjustFactor;
unsigned int cyclesSinceLastPeriodAdjust;
unsigned int nPowStableCyclesToIncreasePeriod;
void printDebugMessage(std::string message);
};

2
README.md
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@@ -249,7 +249,7 @@ Below are listed the configuration sections and configuration fields.
- **Temperature Simulator Configuration**
- *StaticTemperatureDefaultValue* (int)
- Temperature value for simulations with static temperature
- *DynTemperatureSimPeriod* (unsigned int)
- *DynTemperatureSimPeriod* (double)
- Period of the dynamic temperature simulation
- *DynTemperatureSimUnit* (string)
- "s": seconds