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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 matInclude.cc
\brief Some utilities related to hierarchical matrix library.
*/
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>
#include <stdexcept>
#include <cstring>
#include <cstdio>
#include "matInclude.h"
namespace mat {
#ifdef _OPENMP
unsigned int Params::nProcs = 0;
unsigned int Params::matrixParallelLevel = 0;
#endif
normType getNormType(const char* normStr) {
if ( strcmp(normStr, "eucl") == 0)
return mat::euclNorm;
if ( strcmp(normStr, "frob") == 0)
return mat::frobNorm;
if ( strcmp(normStr, "mixed") == 0)
return mat::mixedNorm;
throw "Error in mat::getNormType: Unknown norm type string.";
}
std::string getNormTypeString(normType nType) {
switch(nType) {
case mat::euclNorm: return "eucl";
case mat::frobNorm: return "frob";
case mat::mixedNorm: return "mixed";
}
throw "Error in mat::getNormTypeString: Unknown norm type.";
}
// Class "Time" implementation starts here!
double Time::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;
}
Time::Time():ticTime(0) { }
void Time::tic() {
ticTime = get_wall_seconds();
}
float Time::toc() {
double returnValue = get_wall_seconds() - ticTime;
return (float)returnValue;
}
// Class "MemUsage" implementation starts here!
int MemUsage::getNumberFromBuffer(const char* buffer, const char* s) {
const char* p = buffer;
int slen = strlen(s);
while(1) {
if(*p == '\0')
return -11;
/* now p points to the beginning of a new line. */
if(memcmp(p, s, slen) == 0)
{
int number;
/* string found! */
/* skip until blank or tab */
while(*p != ' ' && *p != '\t' && *p != '\n' && *p != '\0')
p++;
/* skip blanks and tabs */
while(*p == ' ' || *p == '\t')
p++;
/* get number */
number = atoi(p);
/* skip until blank or tab */
while(*p != ' ' && *p != '\t' && *p != '\n' && *p != '\0')
p++;
/* skip blanks and tabs */
while(*p == ' ' || *p == '\t')
p++;
/* now p should point to "kB" */
if(memcmp(p, "kB", 2) != 0)
return -22;
return number;
}
/* skip to next line */
while(*p != '\n' && *p != '\0')
p++;
p++;
}
return -33;
}
void MemUsage::getMemUsage(Values & values) {
char fileName[888];
const size_t PROCFILESIZE = 8888;
char buffer[PROCFILESIZE];
values.virt = 0;
values.res = 0;
values.peak = 0;
int pid = getpid();
sprintf(fileName, "/proc/%i/status", pid);
memset(buffer, 0, PROCFILESIZE);
FILE* f = fopen(fileName, "rt");
// Elias note 2011-01-19: Earlier an exception was thown here, but now we just return with zero result, to make it work on Mac.
if(f == NULL)
return;
size_t noOfBytesRead = fread(buffer, 1, PROCFILESIZE, f);
fclose(f);
if(noOfBytesRead <= 0)
throw std::runtime_error("Error reading proc status file to get mem usage.");
if(noOfBytesRead >= PROCFILESIZE)
throw std::runtime_error("Error reading proc status file to get mem usage: (noOfBytesRead >= PROCFILESIZE).");
int VmSize_kB = getNumberFromBuffer(buffer, "VmSize:");
int VmRSS_kB = getNumberFromBuffer(buffer, "VmRSS:");
int VmPeak_kB = getNumberFromBuffer(buffer, "VmPeak:");
if(VmSize_kB <= 0 || VmRSS_kB <= 0)
throw std::runtime_error("error getting VmSize_kB or VmRSS_kB.");
values.virt = (float)VmSize_kB / 1000000;
values.res = (float)VmRSS_kB / 1000000;
if(VmPeak_kB > 0)
values.peak = (float)VmPeak_kB / 1000000;
else
values.peak = 0;
}
} // end namespace mat
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