File size: 2,776 Bytes
23d354c | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 | // OpenSTA, Static Timing Analyzer
// Copyright (c) 2025, Parallax Software, Inc.
//
// 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 <https://www.gnu.org/licenses/>.
//
// The origin of this software must not be misrepresented; you must not
// claim that you wrote the original software.
//
// Altered source versions must be plainly marked as such, and must not be
// misrepresented as being the original software.
//
// This notice may not be removed or altered from any source distribution.
#include "Machine.hh"
#include <cstdio>
#include <cstdlib>
#include <sys/resource.h>
#include <sys/time.h>
#include <thread>
#include <unistd.h>
#include "Format.hh"
#include "StaConfig.hh"
#include "StringUtil.hh"
namespace sta {
static struct timeval elapsed_begin_time_;
int
processorCount()
{
return std::thread::hardware_concurrency();
}
void
initElapsedTime()
{
struct timezone tz;
gettimeofday(&elapsed_begin_time_, &tz);
}
double
elapsedRunTime()
{
static struct timeval time;
struct timezone tz;
gettimeofday(&time, &tz);
return time.tv_sec - elapsed_begin_time_.tv_sec
+ (time.tv_usec - elapsed_begin_time_.tv_usec) * 1E-6;
}
double
userRunTime()
{
struct rusage rusage;
getrusage(RUSAGE_SELF, &rusage);
return rusage.ru_utime.tv_sec + rusage.ru_utime.tv_usec * 1e-6;
}
double
systemRunTime()
{
struct rusage rusage;
getrusage(RUSAGE_SELF, &rusage);
return rusage.ru_stime.tv_sec + rusage.ru_stime.tv_usec * 1e-6;
}
// rusage->ru_maxrss is not set in linux so read it from /proc.
size_t
memoryUsage()
{
std::string proc_filename = sta::format("/proc/{}/status", getpid());
size_t memory = 0;
FILE *status = fopen(proc_filename.c_str(), "r");
if (status) {
constexpr size_t line_length = 128;
char line[line_length];
while (fgets(line, line_length, status) != nullptr) {
char *field = strtok(line, " \t");
if (field && stringEq(field, "VmRSS:")) {
char *size = strtok(nullptr, " \t");
if (size) {
char *ignore;
// VmRSS is in kilobytes.
memory = strtol(size, &ignore, 10) * 1000;
break;
}
}
}
fclose(status);
}
return memory;
}
} // namespace sta
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