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Polished error model

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This commit is contained in:
Matthias Jung
2015-08-05 09:16:31 +02:00
parent 8be4d8077c
commit dbf3f71589
2 changed files with 114 additions and 75 deletions
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188
DRAMSys/dramSys/src/error/errormodel.cpp
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@@ -34,6 +34,7 @@
*/
#include "errormodel.h"
#include "../common/DebugManager.h"
#include <random>
#include <chrono>
#include <bitset>
@@ -95,11 +96,13 @@ errorModel::errorModel()
// X X X
// X 1 1
// X 1 1
//setTemperature(89);
//weakCells[0].bit = 0;
//weakCells[0].col = 0;
//weakCells[0].row = 0;
//weakCells[0].dependent = true;
setTemperature(89);
markBitFlips();
}
errorModel::~errorModel()
@@ -121,7 +124,7 @@ errorModel::~errorModel()
// Clean list of weak cells:
delete [] weakCells;
// If an access happened to a bank the numner of errors should be shown:
// If an access happened to a bank the numner of error events should be shown:
if(myChannel != -1 && myBank != -1 && myBankgroup != -1 && myRank != -1 )
{
std::cout << name
@@ -132,6 +135,9 @@ errorModel::~errorModel()
void errorModel::store(tlm::tlm_generic_payload &trans)
{
// Check wich bits have flipped during the last access and mark them as flipped:
markBitFlips();
// Get the key for the dataMap from the transaction's address:
DecodedAddress key = xmlAddressDecoder::getInstance().decodeAddress(trans.get_address());
@@ -161,6 +167,7 @@ void errorModel::store(tlm::tlm_generic_payload &trans)
memcpy(data, trans.get_data_ptr()+i, bytesPerColumn);
// Save part of the burst in the dataMap
// TODO: Check if we can have double entries, is key unique?
dataMap.insert(std::pair<DecodedAddress, unsigned char*>(key,data));
// Reset flipped weak cells in this area, since they are rewritten now
@@ -183,12 +190,14 @@ void errorModel::store(tlm::tlm_generic_payload &trans)
// Check that there is no column overfow:
assert(key.column <= numberOfColumns);
}
}
void errorModel::load(tlm::tlm_generic_payload &trans)
{
// Check wich bits have flipped during the last access and mark them as flipped:
markBitFlips();
// Get the key for the dataMap from the transaction's address:
DecodedAddress key = xmlAddressDecoder::getInstance().decodeAddress(trans.get_address());
@@ -218,6 +227,33 @@ void errorModel::load(tlm::tlm_generic_payload &trans)
}
}
void errorModel::markBitFlips()
{
for(unsigned int row = 0; row < Configuration::getInstance().memSpec.NumberOfRows; row++)
{
// Get the time interval between now and the last acivate/refresh
sc_time interval = sc_time_stamp() - lastRowAccess[row];
// Obtain the number of bit flips for the current temperature and the time interval:
unsigned int n = getNumberOfFlips(temperature, interval);
// Check if the current row is in the range of bit flips for this interval
// and temperature, if yes mark it as flipped:
for (unsigned int i=0; i<n; i++)
{
// Check if Bit has marked as flipped yet, if yes mark it as flipped
if(weakCells[i].flipped == false && weakCells[i].row == row)
{
std::stringstream msg;
msg << "Maked weakCell[" << i << "] as flipped" << std::endl;
DebugManager::getInstance().printDebugMessage(name, msg.str());
weakCells[i].flipped = true;
}
}
}
}
void errorModel::refresh(unsigned int row)
{
// A refresh is internally composed of ACT and PRE that are executed
@@ -227,29 +263,14 @@ void errorModel::refresh(unsigned int row)
void errorModel::activate(unsigned int row)
{
// Check wich bits have flipped during the last access and mark them as flipped:
markBitFlips();
// The Activate command is responsible that an retention error is manifested.
// Get the time interval between now and the last acivate/refresh
sc_time interval = sc_time_stamp() - lastRowAccess[row];
// Obtain the number of bit flips for the current temperature and the time interval:
unsigned int n = getNumberOfFlips(temperature, interval);
// Mark the the first n Bits in the list of weak cells as flipped:
for (unsigned int i=0; i<n; i++)
{
// Check if Bit has marked as flipped yet, if yes mark it as flipped
if(weakCells[i].flipped == false)
{
//std::cout << "Maked weakCell[" << i << "] as flipped" << std::endl;
weakCells[i].flipped = true;
}
}
// Flip the bit in the data structure if it is marked as flipped
// Therefore, Flip the bit in the data structure if it is marked as flipped
// and if it is a one. Transisitons from 0 to 1 are only happening
// in DRAM with anticells. This behavior is not implemented yet.
for (unsigned int i=0; i<n; i++)
for (unsigned int i=0; i < maxNumberOfWeakCells; i++)
{
if(weakCells[i].flipped == true && weakCells[i].row == row)
{
@@ -268,7 +289,7 @@ void errorModel::activate(unsigned int row)
// Bit position in byte:
unsigned int bitInByte = weakCells[i].bit % 8;
// Check if the bit is 1 (onlue 1->0 transitions are supported)
// Check if the bit is 1 (only 1->0 transitions are supported)
// DRAMs based on anti cells are not supported yet by this model
if(getBit(key,byte,bitInByte) == 1)
{
@@ -287,11 +308,13 @@ void errorModel::activate(unsigned int row)
// Flip the bit:
tempByte = (tempByte & mask);
std::cout << "--- Bit Flipped:"
<< " row: " << key.row
<< " col: " << key.column
<< " bit: " << weakCells[i].bit
<< " ---"<< std::endl;
// Output on the Console:
std::stringstream msg;
msg << "Bit Flipped!"
<< " row: " << key.row
<< " col: " << key.column
<< " bit: " << weakCells[i].bit;
DebugManager::getInstance().printDebugMessage(name, msg.str());
numberOfBitErrorEvents++;
@@ -338,24 +361,31 @@ void errorModel::activate(unsigned int row)
// Copy the modified byte back to the dataMap:
memcpy(dataMap[key]+byte, &tempByte, 1);
std::cout << "--- Dependent Bit Flipped:"
<< " row: " << key.row
<< " col: " << key.column
<< " bit: " << weakCells[i].bit
<< " sum: " << sum
<< " ---"<< std::endl;
std::cout << grid[0] << grid[1] << grid[2] << std::endl;
std::cout << grid[3] << grid[4] << grid[5] << std::endl;
std::cout << grid[6] << grid[7] << grid[8] << std::endl;
// Output on the Console:
std::stringstream msg;
msg << "Dependent Bit Flipped!"
<< " row: " << key.row
<< " col: " << key.column
<< " bit: " << weakCells[i].bit
<< " sum: " << sum << std::endl
<< grid[0] << grid[1] << grid[2] << std::endl
<< grid[3] << grid[4] << grid[5] << std::endl
<< grid[6] << grid[7] << grid[8];
DebugManager::getInstance().printDebugMessage(name, msg.str());
}
else
{
std::cout << "--- Dependent Bit NOT Flipped:"
<< " row: " << key.row
<< " col: " << key.column
<< " bit: " << weakCells[i].bit
<< " sum: " << sum
<< " ---"<< std::endl;
// Output on the Console:
std::stringstream msg;
msg << "Dependent Bit NOT Flipped!"
<< " row: " << key.row
<< " col: " << key.column
<< " bit: " << weakCells[i].bit
<< " sum: " << sum << std::endl
<< grid[0] << grid[1] << grid[2] << std::endl
<< grid[3] << grid[4] << grid[5] << std::endl
<< grid[6] << grid[7] << grid[8];
DebugManager::getInstance().printDebugMessage(name, msg.str());
}
}
}
@@ -382,10 +412,15 @@ unsigned int errorModel::getBit(DecodedAddress key, unsigned int byteInColumn, u
unsigned char mask = pow(2, bitInByte);
unsigned int result = (tempByte & mask) >> bitInByte;
std::bitset<8> x(mask);
std::cout << "mask = " << x
<< " bitInByte = " << bitInByte
<< " tempByte = " << (unsigned int)tempByte
<< " result = " << result << std::endl;
std::stringstream msg;
msg << "mask = " << x
<< " bitInByte = " << bitInByte
<< " tempByte = " << (unsigned int)tempByte
<< " result = " << result;
DebugManager::getInstance().printDebugMessage(name, msg.str());
return result;
}
}
@@ -447,7 +482,7 @@ unsigned int errorModel::getBit(int row, int column, int byteInColumn, int bitIn
key.column = column;
key.row = row;
getBit(key, byteInColumn, bitInByte);
return getBit(key, byteInColumn, bitInByte);
}
void errorModel::setTemperature(double t)
@@ -460,8 +495,6 @@ void errorModel::parseInputData()
std::string fileName = Configuration::getInstance().ErrorCSVFile;
std::ifstream inputFile(fileName);
std::cout << std::endl << name <<", Parsing Error File: " << fileName << std::endl;
if(inputFile.is_open())
{
std::string line;
@@ -483,7 +516,7 @@ void errorModel::parseInputData()
>> str_mu_dependent
>> str_sigma_dependent;
double temperature = std::stod(str_temperature.c_str(), 0);
double temp = std::stod(str_temperature.c_str(), 0);
sc_time retentionTime = sc_time(std::stod(str_retentionTime.c_str(),0),SC_MS);
unsigned int mu_independent = std::stod(str_mu_independent.c_str(),0);
@@ -506,16 +539,16 @@ void errorModel::parseInputData()
e.dependent = ceil(distribution2(generator2));
// Store parsed data to the errorMap:
errorMap[temperature][retentionTime] = e;
errorMap[temp][retentionTime] = e;
std::cout << "Temperature = " << temperature
<< " Time = " << retentionTime
<< " independent = " << errorMap[temperature][retentionTime].independent
<< " dependent = " << errorMap[temperature][retentionTime].dependent
<< std::endl;
std::stringstream msg;
msg << "Temperature = " << temp
<< " Time = " << retentionTime
<< " independent = " << errorMap[temp][retentionTime].independent
<< " dependent = " << errorMap[temp][retentionTime].dependent;
DebugManager::getInstance().printDebugMessage(name, msg.str());
}
std::cout << std::endl;
inputFile.close();
}
else
@@ -594,7 +627,8 @@ void errorModel::prepareWeakCells()
}
}
// If a cell was already choosen as weak we have to roll the dice again:
if(found == true) {
if(found == true)
{
i--;
}
else
@@ -627,11 +661,13 @@ void errorModel::prepareWeakCells()
// Debug output where the weak cells are located:
for (unsigned int i=0; i<maxNumberOfWeakCells; i++)
{
std::cout << "row=" << weakCells[i].row
<< "\tcol=" << weakCells[i].col
<< "\tbit=" << weakCells[i].bit
<< "\tflip=" << weakCells[i].flipped
<< "\tdep=" << weakCells[i].dependent << std::endl;
std::stringstream msg;
msg << "row=" << weakCells[i].row
<< " col=" << weakCells[i].col
<< " bit=" << weakCells[i].bit
<< " flip=" << weakCells[i].flipped
<< " dep=" << weakCells[i].dependent;
DebugManager::getInstance().printDebugMessage(name, msg.str());
}
}
@@ -674,17 +710,19 @@ unsigned int errorModel::getNumberOfFlips(double temp, sc_time time)
errors e = errorMap[nearestTemperature][nearestTime];
// Find nearest time:
/*
std::cout << "ACT/REF temp:" << temp
<< " time:" << time
<< " nearestTemp:" << nearestTemperature
<< " nearestTime:" << nearestTime
<< " ind:" << e.independent
<< " dep:" << e.dependent << std::endl;
*/
//std::stringstream msg;
//msg << "ACT/REF temp:" << temp
// << " time:" << time
// << " nearestTemp:" << nearestTemperature
// << " nearestTime:" << nearestTime
// << " ind:" << e.independent
// << " dep:" << e.dependent;
//DebugManager::getInstance().printDebugMessage(name, msg.str());
return e.independent + e.dependent;
}
return 0;
}
void errorModel::setContext(DecodedAddress addr)

1
DRAMSys/dramSys/src/error/errormodel.h
View File

@@ -71,6 +71,7 @@ class errorModel
// Private Methods:
void parseInputData();
void prepareWeakCells();
void markBitFlips();
unsigned int getNumberOfFlips(double temp, sc_time time);
void setContext(DecodedAddress addr);
unsigned int getBit(DecodedAddress key, unsigned int byte, unsigned int bitInByte);