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/* Ergo, version 3.8.2, a program for linear scaling electronic structure
* calculations.
* Copyright (C) 2023 Elias Rudberg, Emanuel H. Rubensson, Pawel Salek,
* and Anastasia Kruchinina.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Primary academic reference:
* Ergo: An open-source program for linear-scaling electronic structure
* calculations,
* Elias Rudberg, Emanuel H. Rubensson, Pawel Salek, and Anastasia
* Kruchinina,
* SoftwareX 7, 107 (2018),
* <http://dx.doi.org/10.1016/j.softx.2018.03.005>
*
* For further information about Ergo, see <http://www.ergoscf.org>.
*/
/** @file utilities.h
@brief Basic OS access utilities.
@author: Elias Rudberg <em>responsible</em>
*/
#ifndef UTILITIES_HEADER
#define UTILITIES_HEADER
#include <time.h>
#include <sys/time.h>
#include <sys/resource.h>
#define MAX_HOST_NAME_LEN 100
typedef struct
{
char s[MAX_HOST_NAME_LEN];
} host_name_struct;
#define MAX_WORKING_DIRECTORY_LEN 800
typedef struct
{
char s[MAX_WORKING_DIRECTORY_LEN];
} working_directory_struct;
void get_host_name(host_name_struct* result);
void get_working_directory(working_directory_struct* result);
int get_memory_usage_by_ps(double* virtualMemoryGigaBytes, double* residentMemoryGigaBytes);
int get_memory_usage_by_procfile(double* virtualMemGigaBytes,
double* residentMemGigaBytes,
double* virtualMemPeakGigaBytes);
int generate_unique_random_filename(char* result, unsigned n);
long int get_file_size(const char* fileName);
#include <stdexcept>
#include "output.h"
#include "realtype.h"
namespace Util {
/** Time-measuring class. Measures the time between the
construction of the object and the call of the print method. */
class TimeMeter {
private:
double startTimeCPU_sys;
double startTimeCPU_usr;
double startTimeWall;
public:
double get_start_time_wall_seconds() const {
return startTimeWall;
}
static double get_wall_seconds() {
struct timeval tv;
if(gettimeofday(&tv, NULL) != 0)
throw std::runtime_error("Error in get_wall_seconds(), in gettimeofday().");
double seconds = tv.tv_sec + (double)tv.tv_usec / 1000000;
return seconds;
}
static void get_current_cpu_times(double & seconds_usr, double & seconds_sys) {
struct rusage usage;
if(getrusage (RUSAGE_SELF, &usage) != 0)
throw std::runtime_error("Error in get_current_cpu_times(), in getrusage().");
seconds_usr = usage.ru_utime.tv_sec + (double)usage.ru_utime.tv_usec / 1000000;
seconds_sys = usage.ru_stime.tv_sec + (double)usage.ru_stime.tv_usec / 1000000;
}
TimeMeter() {
startTimeWall = get_wall_seconds();
get_current_cpu_times(startTimeCPU_usr, startTimeCPU_sys);
}
double get_elapsed_wall_seconds() {
double endTimeWall = get_wall_seconds();
return endTimeWall - startTimeWall;
}
void print(int area, const char *routine) {
double endTimeWall = get_wall_seconds();
double secondsTakenWall = endTimeWall - startTimeWall;
double seconds_usr, seconds_sys;
get_current_cpu_times(seconds_usr, seconds_sys);
double secondsTakenCPU_usr = seconds_usr - startTimeCPU_usr;
double secondsTakenCPU_sys = seconds_sys - startTimeCPU_sys;
do_output(LOG_CAT_TIMINGS, area, "%s took %9.2f usr cpu s %9.2f sys cpu s %9.2f wall s",
routine, secondsTakenCPU_usr, secondsTakenCPU_sys, secondsTakenWall);
}
};
}
#endif /* UTILITIES_HEADER */
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