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536 lines (468 loc) · 19.7 KB
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#define BOOST_FILESYSTEM_VERSION 3
#include "ssd.h"
#include <fstream>
#include <sstream>
#include <unistd.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <sys/stat.h>
#include <stdio.h> /* defines FILENAME_MAX */
#include <iostream>
#define SIZE 2
using namespace ssd;
const string Experiment::markers[] = {"circle", "square", "triangle", "diamond", "cross", "plus", "star", "star2", "star3", "star4", "flower"};
const bool Experiment::REMOVE_GLE_SCRIPTS_AGAIN = false;
const double Experiment::M = 1000000.0; // One million
const double Experiment::K = 1000.0; // One thousand
double Experiment::calibration_precision = 1.0; // microseconds
double Experiment::calibration_starting_point = 15.00; // microseconds
string Experiment::base_folder = get_current_dir_name();
Experiment::Experiment()
: d_variable(NULL), d_min(0), d_max(0), d_incr(0),
i_variable(NULL), i_min(0), i_max(0), i_incr(0),
io_limit(NUMBER_OF_ADDRESSABLE_PAGES()),
workload(NULL), calibration_workload(NULL),
calibrate_for_each_point(false),
results(),
generate_trace_file(false),
alternate_location_for_results_file("")
{}
void Experiment::unify_under_one_statistics_gatherer(vector<Thread*> threads, StatisticsGatherer* statistics_gatherer) {
for (uint i = 0; i < threads.size(); ++i) {
threads[i]->set_statistics_gatherer(statistics_gatherer);
unify_under_one_statistics_gatherer(threads[i]->get_follow_up_threads(), statistics_gatherer); // Recurse
}
}
void Experiment::set_variable(double* variable, double low, double high, double incr, string name) {
d_variable = variable;
d_min = low;
d_max = high;
d_incr = incr;
variable_name = name;
}
void Experiment::set_variable(int* variable, int low, int high, int incr, string name) {
i_variable = variable;
i_min = low;
i_max = high;
i_incr = incr;
variable_name = name;
}
void Experiment::run(string name) {
Thread::set_record_internal_statistics(true);
StatisticsGatherer::set_record_statistics(true);
if (MAX_REPEATED_COPY_BACKS_ALLOWED > 0) {
fprintf(stderr, "The simulation parameter MAX_REPEATED_COPY_BACKS_ALLOWED is greater than 0. This is still buggy, and so we fail.\nSet this parameter to 0 to remove this error message.\n");
}
if (i_variable == NULL && d_variable == NULL) {
run_single_point(name);
}
else if (d_variable != NULL) {
simple_experiment_double(name, d_variable, d_min, d_max, d_incr);
}
else if (i_variable != NULL) {
simple_experiment_double(name, i_variable, i_min, i_max, i_incr);
}
}
void Experiment::run_single_point(string name) {
string data_folder = base_folder + name + "/";
mkdir(data_folder.c_str(), 0755);
StatisticsGatherer::set_record_statistics(true);
Thread::set_record_internal_statistics(true);
Experiment_Result global_result(name, data_folder, "Global/", "");
Individual_Threads_Statistics::init();
global_result.start_experiment();
Free_Space_Meter::init();
Free_Space_Per_LUN_Meter::init();
if (generate_trace_file) {
VisualTracer::init(data_folder);
} else {
VisualTracer::init();
}
write_config_file(data_folder);
Queue_Length_Statistics::init();
printf("calibration_file : %s\n", calibration_file.c_str());
OperatingSystem* os = calibration_file.empty() ? new OperatingSystem() : load_state(calibration_file);
//os->set_progress_meter_granularity(10);
if (workload != NULL) {
vector<Thread*> experiment_threads = workload->generate_instance();
os->set_threads(experiment_threads);
}
os->set_num_writes_to_stop_after(io_limit);
os->run();
StatisticsGatherer::get_global_instance()->print();
StatisticsGatherer::get_global_instance()->print_mapping_info();
StatisticsGatherer::get_global_instance()->print_gc_info();
Utilization_Meter::print();
//Individual_Threads_Statistics::print();
//Queue_Length_Statistics::print_distribution();
//Queue_Length_Statistics::print_avg();
Free_Space_Meter::print();
Free_Space_Per_LUN_Meter::print();
global_result.collect_stats("0", StatisticsGatherer::get_global_instance());
write_results_file(data_folder);
if (!alternate_location_for_results_file.compare("") == 0) {
printf("writing results in %s\n", alternate_location_for_results_file.c_str());
write_results_file(alternate_location_for_results_file);
}
global_result.end_experiment();
vector<Experiment_Result> result;
result.push_back(global_result);
results.push_back(result);
delete os;
}
template <class T>
void Experiment::simple_experiment_double(string name, T* var, T min, T max, T inc) {
string data_folder = base_folder + name + "/";
mkdir(data_folder.c_str(), 0755);
Experiment_Result global_result(name, data_folder, "Global/", variable_name);
global_result.start_experiment();
T& variable = *var;
for (variable = min; variable <= max; ) {
printf("----------------------------------------------------------------------------------------------------------\n");
printf("%s : %s \n", name.c_str(), to_string(variable).c_str());
printf("----------------------------------------------------------------------------------------------------------\n");
string point_folder_name = data_folder + to_string(variable) + "/";
mkdir(point_folder_name.c_str(), 0755);
if (generate_trace_file) {
VisualTracer::init(data_folder);
} else {
VisualTracer::init();
}
write_config_file(point_folder_name);
Queue_Length_Statistics::init();
Free_Space_Meter::init();
Free_Space_Per_LUN_Meter::init();
OperatingSystem* os;
if (calibrate_for_each_point && calibration_workload != NULL) {
string calib_file_name = "calib-" + name + "-" + to_string(variable) + ".txt";
Experiment::calibrate_and_save(calibration_workload, calib_file_name, NUMBER_OF_ADDRESSABLE_PAGES() * 8);
os = load_state(calib_file_name);
//StateVisualiser::print_page_status();
} else if (!calibration_file.empty()) {
os = load_state(calibration_file);
} else {
os = new OperatingSystem();
}
if (workload != NULL) {
vector<Thread*> experiment_threads = workload->generate_instance();
os->set_threads(experiment_threads);
}
StatisticsGatherer::set_record_statistics(true);
os->set_num_writes_to_stop_after(io_limit);
os->run();
StatisticsGatherer::get_global_instance()->print();
//StatisticsGatherer::get_global_instance()->print_gc_info();
//Utilization_Meter::print();
//Queue_Length_Statistics::print_avg();
//Free_Space_Meter::print();
//Free_Space_Per_LUN_Meter::print();
stringstream var_str;
var_str << variable;
global_result.collect_stats(var_str.str(), StatisticsGatherer::get_global_instance());
StatisticData::init();
write_results_file(point_folder_name);
delete os;
if (exponential_increase) {
variable *= inc;
}
else {
variable += inc;
}
}
global_result.end_experiment();
vector<Experiment_Result> result;
result.push_back(global_result);
results.push_back(result);
}
vector<Experiment_Result> Experiment::random_writes_on_the_side_experiment(Workload_Definition* workload, int write_threads_min, int write_threads_max, int write_threads_inc, string name, int IO_limit, double used_space, int random_writes_min_lba, int random_writes_max_lba) {
string data_folder = base_folder + name;
mkdir(data_folder.c_str(), 0755);
Experiment_Result global_result (name, data_folder, "Global/", "Number of concurrent random write threads");
Experiment_Result experiment_result (name, data_folder, "Experiment_Threads/", "Number of concurrent random write threads");
Experiment_Result write_threads_result(name, data_folder, "Noise_Threads/", "Number of concurrent random write threads");
global_result.start_experiment();
experiment_result.start_experiment();
write_threads_result.start_experiment();
for (int random_write_threads = write_threads_min; random_write_threads <= write_threads_max; random_write_threads += write_threads_inc) {
printf("----------------------------------------------------------------------------------------------------------\n");
printf("%s : Experiment with max %d concurrent random writes threads.\n", name.c_str(), random_write_threads);
printf("----------------------------------------------------------------------------------------------------------\n");
StatisticsGatherer* experiment_statistics_gatherer = new StatisticsGatherer();
StatisticsGatherer* random_writes_statics_gatherer = new StatisticsGatherer();
Thread* initial_write = new Asynchronous_Sequential_Writer(0, used_space);
if (workload != NULL) {
vector<Thread*> experiment_threads = workload->generate_instance();
unify_under_one_statistics_gatherer(experiment_threads, experiment_statistics_gatherer);
initial_write->add_follow_up_threads(experiment_threads);
}
for (int i = 0; i < random_write_threads; i++) {
ulong randseed = (i*3)+537;
Simple_Thread* random_writes = new Synchronous_Random_Writer(random_writes_min_lba, random_writes_max_lba, randseed);
Simple_Thread* random_reads = new Synchronous_Random_Reader(random_writes_min_lba, random_writes_max_lba, randseed+461);
/*if (workload == NULL) {
random_writes->set_experiment_thread(true);
random_reads->set_experiment_thread(true);
}*/
random_writes->set_num_ios(INFINITE);
random_reads->set_num_ios(INFINITE);
random_writes->set_statistics_gatherer(random_writes_statics_gatherer);
random_reads->set_statistics_gatherer(random_writes_statics_gatherer);
initial_write->add_follow_up_thread(random_writes);
initial_write->add_follow_up_thread(random_reads);
}
vector<Thread*> threads;
threads.push_back(initial_write);
OperatingSystem* os = new OperatingSystem();
os->set_threads(threads);
os->set_num_writes_to_stop_after(IO_limit);
os->run();
stringstream var_str;
var_str << random_write_threads;
// Collect statistics from this experiment iteration (save in csv files)
global_result.collect_stats (var_str.str(), StatisticsGatherer::get_global_instance());
experiment_result.collect_stats (var_str.str(), experiment_statistics_gatherer);
write_threads_result.collect_stats(var_str.str(), random_writes_statics_gatherer);
if (workload == NULL) {
StatisticsGatherer::get_global_instance()->print();
} else {
experiment_statistics_gatherer->print();
}
//StatisticsGatherer::get_global_instance()->print();
//random_writes_statics_gatherer->print();
if (PRINT_LEVEL >= 1) {
StateVisualiser::print_page_status();
StateVisualiser::print_block_ages();
}
delete os;
delete experiment_statistics_gatherer;
delete random_writes_statics_gatherer;
}
global_result.end_experiment();
experiment_result.end_experiment();
write_threads_result.end_experiment();
vector<Experiment_Result> results;
results.push_back(global_result);
results.push_back(experiment_result);
results.push_back(write_threads_result);
if (workload != NULL)
delete workload;
return results;
}
Experiment_Result Experiment::copyback_experiment(vector<Thread*> (*experiment)(int highest_lba), int used_space, int max_copybacks, string data_folder, string name, int IO_limit) {
Experiment_Result experiment_result(name, data_folder, "", "CopyBacks allowed before ECC check");
experiment_result.start_experiment();
const int num_pages = NUMBER_OF_ADDRESSABLE_BLOCKS() * BLOCK_SIZE;
for (int copybacks_allowed = 0; copybacks_allowed <= max_copybacks; copybacks_allowed += 1) {
int highest_lba = (int) ((double) num_pages * used_space / 100);
printf("---------------------------------------\n");
printf("Experiment with %d copybacks allowed.\n", copybacks_allowed);
printf("---------------------------------------\n");
MAX_REPEATED_COPY_BACKS_ALLOWED = copybacks_allowed;
// Run experiment
vector<Thread*> threads = experiment(highest_lba);
OperatingSystem* os = new OperatingSystem();
os->set_threads(threads);
os->set_num_writes_to_stop_after(IO_limit);
os->run();
stringstream var_str;
var_str << copybacks_allowed;
// Collect statistics from this experiment iteration (save in csv files)
experiment_result.collect_stats(var_str.str());
StatisticsGatherer::get_global_instance()->print();
if (PRINT_LEVEL >= 1) {
StateVisualiser::print_page_status();
StateVisualiser::print_block_ages();
}
delete os;
}
experiment_result.end_experiment();
return experiment_result;
}
Experiment_Result Experiment::copyback_map_experiment(vector<Thread*> (*experiment)(int highest_lba), int cb_map_min, int cb_map_max, int cb_map_inc, int used_space, string data_folder, string name, int IO_limit) {
Experiment_Result experiment_result(name, data_folder, "", "Max copyback map size");
experiment_result.start_experiment();
const int num_pages = NUMBER_OF_ADDRESSABLE_BLOCKS() * BLOCK_SIZE;
for (int copyback_map_size = cb_map_min; copyback_map_size <= cb_map_max; copyback_map_size += cb_map_inc) {
int highest_lba = (int) ((double) num_pages * used_space / 100);
printf("-------------------------------------------------------\n");
printf("Experiment with %d copybacks allowed in copyback map. \n", copyback_map_size);
printf("-------------------------------------------------------\n");
MAX_ITEMS_IN_COPY_BACK_MAP = copyback_map_size;
// Run experiment
vector<Thread*> threads = experiment(highest_lba);
OperatingSystem* os = new OperatingSystem();
os->set_threads(threads);
os->set_num_writes_to_stop_after(IO_limit);
os->run();
stringstream var_str;
var_str << copyback_map_size;
// Collect statistics from this experiment iteration (save in csv files)
experiment_result.collect_stats(var_str.str());
StatisticsGatherer::get_global_instance()->print();
if (PRINT_LEVEL >= 1) {
StateVisualiser::print_page_status();
StateVisualiser::print_block_ages();
}
delete os;
}
experiment_result.end_experiment();
return experiment_result;
}
// currently, this method checks if there if a file already exists, and if so, assumes it is valid.
// ideally, a check should be made to ensure the saved SSD state matches with the state of the current global parameters
void Experiment::calibrate_and_save(Workload_Definition* workload, string name, int num_IOs, bool force) {
//string file_name = base_folder + "calibrated_state.txt";
string file_name = base_folder + name;
std::ifstream ifile(file_name.c_str());
if (ifile && !force) {
return; // file exists
}
StatisticsGatherer::set_record_statistics(false);
//StatisticsGatherer::get_global_instance()->init();
Thread::set_record_internal_statistics(false);
VisualTracer::init();
//Free_Space_Meter::init();
//Free_Space_Per_LUN_Meter::init();
printf("Creating calibrated SSD state.\n");
OperatingSystem* os = new OperatingSystem();
//num_IOs /= 2;
os->set_num_writes_to_stop_after(num_IOs);
vector<Thread*> init_threads = workload->generate_instance();
os->set_threads(init_threads);
os->set_progress_meter_granularity(1000);
os->run();
os->get_ssd()->execute_all_remaining_events();
//Block_Manager_Tag_Groups* bm = (Block_Manager_Tag_Groups*) os->get_ssd()->get_scheduler()->get_bm();
//bm->print();
save_state(os, file_name);
//StateVisualiser::print_page_status();
//StatisticsGatherer::get_global_instance()->print();
//Free_Space_Meter::print();
//Free_Space_Per_LUN_Meter::print();
delete os;
}
void Experiment::write_config_file(string folder_name) {
string file_name = folder_name + "configuration.txt";
FILE* file = fopen(file_name.c_str() , "w");
print_config(file);
fclose(file);
}
void Experiment::write_results_file(string folder_name) {
string file_name = folder_name + "results.txt";
printf("Writing results file in: %s\n", file_name.c_str());
FILE* file = fopen(file_name.c_str() , "w");
StatisticsGatherer::get_global_instance()->print_simple(file);
double channel_util = Utilization_Meter::get_avg_channel_utilization();
fprintf(file, "channel util:\t%f\n", channel_util);
double LUN_util = Utilization_Meter::get_avg_LUN_utilization();
fprintf(file, "LUN util:\t%f\n\n", LUN_util);
for (int i = 0; i < SSD_SIZE; i++) {
fprintf(file, "Channel util for package %d:\t%f\n", i, Utilization_Meter::get_channel_utilization(i) );
}
fprintf(file, "\n");
for (int i = 0; i < SSD_SIZE * PACKAGE_SIZE; i++) {
fprintf(file, "LUN util for LUN %d:\t%f\n", i, Utilization_Meter::get_LUN_utilization(i) );
}
fprintf(file, "\n");
//Individual_Threads_Statistics::print();
for (int i = 0; i < Individual_Threads_Statistics::size(); i++) {
StatisticsGatherer* sg = Individual_Threads_Statistics::get_stats_for_thread(i);
if (sg != NULL) {
int num_reads = sg->total_reads();
int num_writes = sg->total_writes();
fprintf(file, "Thread reads %d: %d\n", i, num_reads);
fprintf(file, "Thread writes %d: %d\n", i, num_writes);
}
}
fclose(file);
}
void Experiment::save_state(OperatingSystem* os, string file_name) {
vector<Thread*> threads = os->get_non_finished_threads();
std::ofstream file(file_name.c_str());
printf("%s\n", file_name.c_str());
boost::archive::text_oarchive oa(file);
oa.register_type<FtlImpl_Page>( );
oa.register_type<FAST>( );
oa.register_type<DFTL>( );
oa.register_type<Block_manager_parallel>( );
oa.register_type<Sequential_Locality_BM>( );
oa.register_type<Block_Manager_Tag_Groups>( );
oa.register_type<File_Manager>( );
oa.register_type<Simple_Thread>( );
oa.register_type<Random_IO_Pattern>( );
oa.register_type<Sequential_IO_Pattern>( );
oa.register_type<WRITES>( );
oa.register_type<TRIMS>( );
oa.register_type<READS>( );
oa.register_type<READS_OR_WRITES>();
oa.register_type<Asynchronous_Random_Writer>();
oa.register_type<Asynchronous_Random_Reader>();
oa.register_type<Synchronous_Random_Writer>( );
oa.register_type<MTRand>();
oa.register_type<MTRand_closed>();
oa.register_type<MTRand_open>();
oa.register_type<MTRand53>();
oa.register_type<Garbage_Collector_Greedy>();
//oa.register_type<Garbage_Collector_LRU>();
oa << os;
oa << threads;
file.close();
}
OperatingSystem* Experiment::load_state(string name) {
string file_name = base_folder + name;
printf("loading calibration file: %s\n", file_name.c_str());
std::ifstream file(file_name.c_str());
boost::archive::text_iarchive ia(file);
ia.register_type<FtlImpl_Page>( );
ia.register_type<FAST>();
ia.register_type<DFTL>();
ia.register_type<Block_manager_parallel>();
ia.register_type<Sequential_Locality_BM>( );
ia.register_type<File_Manager>( );
ia.register_type<Simple_Thread>( );
ia.register_type<Random_IO_Pattern>( );
ia.register_type<Sequential_IO_Pattern>( );
ia.register_type<WRITES>( );
ia.register_type<TRIMS>( );
ia.register_type<READS>( );
ia.register_type<READS_OR_WRITES>();
ia.register_type<Asynchronous_Random_Writer>();
ia.register_type<Asynchronous_Random_Reader>();
ia.register_type<Synchronous_Random_Writer>( );
ia.register_type<MTRand>();
ia.register_type<MTRand_closed>();
ia.register_type<MTRand_open>();
ia.register_type<MTRand53>();
ia.register_type<Garbage_Collector_Greedy>();
//ia.register_type<Garbage_Collector_LRU>();
OperatingSystem* os;
ia >> os;
vector<Thread*> threads;
ia >> threads;
Individual_Threads_Statistics::init();
for (auto t : threads) {
//Individual_Threads_Statistics::register_thread(t, "");
}
os->set_threads(threads);
//os->init_threads();
IOScheduler* scheduler = os->get_ssd()->get_scheduler();
scheduler->init();
Block_manager_parent* bm = Block_manager_parent::get_new_instance();
bm->copy_state(scheduler->get_bm());
delete scheduler->get_bm();
scheduler->set_block_manager(bm);
FtlParent* ftl = os->get_ssd()->get_ftl();
//delete ftl->get_block_manager();
ftl->set_block_manager(bm);
Migrator* m = scheduler->get_migrator();
m->set_block_manager(bm);
Garbage_Collector* gc = m->get_garbage_collector();
gc->set_block_manager(bm);
return os;
}
void Experiment::create_base_folder(string name) {
string exp_folder = get_current_dir_name() + name;
printf("creating exp folder: %s\n", get_current_dir_name());
base_folder = exp_folder;
mkdir(base_folder.c_str(), 0755);
}
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