109 lines
2.7 KiB
C++
109 lines
2.7 KiB
C++
// OpenSTA, Static Timing Analyzer
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// Copyright (c) 2025, Parallax Software, Inc.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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//
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// The origin of this software must not be misrepresented; you must not
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// claim that you wrote the original software.
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//
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// Altered source versions must be plainly marked as such, and must not be
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// misrepresented as being the original software.
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//
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// This notice may not be removed or altered from any source distribution.
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#include "Machine.hh"
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#include <stdlib.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#include <thread>
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#include "StaConfig.hh"
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#include "StringUtil.hh"
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namespace sta {
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static struct timeval elapsed_begin_time_;
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int
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processorCount()
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{
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return std::thread::hardware_concurrency();
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}
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void
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initElapsedTime()
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{
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struct timezone tz;
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gettimeofday(&elapsed_begin_time_, &tz);
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}
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double
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elapsedRunTime()
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{
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static struct timeval time;
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struct timezone tz;
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gettimeofday(&time, &tz);
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return time.tv_sec - elapsed_begin_time_.tv_sec
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+ (time.tv_usec - elapsed_begin_time_.tv_usec) * 1E-6;
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}
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double
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userRunTime()
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{
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struct rusage rusage;
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getrusage(RUSAGE_SELF, &rusage);
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return rusage.ru_utime.tv_sec + rusage.ru_utime.tv_usec * 1e-6;
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}
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double
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systemRunTime()
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{
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struct rusage rusage;
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getrusage(RUSAGE_SELF, &rusage);
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return rusage.ru_stime.tv_sec + rusage.ru_stime.tv_usec * 1e-6;
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}
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// rusage->ru_maxrss is not set in linux so read it from /proc.
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size_t
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memoryUsage()
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{
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std::string proc_filename;
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stringPrint(proc_filename, "/proc/%d/status", getpid());
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size_t memory = 0;
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FILE *status = fopen(proc_filename.c_str(), "r");
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if (status) {
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constexpr size_t line_length = 128;
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char line[line_length];
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while (fgets(line, line_length, status) != nullptr) {
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char *field = strtok(line, " \t");
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if (field && stringEq(field, "VmRSS:")) {
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char *size = strtok(nullptr, " \t");
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if (size) {
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char *ignore;
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// VmRSS is in kilobytes.
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memory = strtol(size, &ignore, 10) * 1000;
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break;
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}
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}
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}
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fclose(status);
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}
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return memory;
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}
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} // namespace
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