check_thread_affinity.c 2.79 KB
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//    Copyright 2021, A. Marek
//
//    This file is part of ELPA.
//
//    The ELPA library was originally created by the ELPA consortium,
//    consisting of the following organizations:
//
//    - Max Planck Computing and Data Facility (MPCDF), formerly known as
//      Rechenzentrum Garching der Max-Planck-Gesellschaft (RZG),
//    - Bergische Universität Wuppertal, Lehrstuhl für angewandte
//      Informatik,
//    - Technische Universität München, Lehrstuhl für Informatik mit
//      Schwerpunkt Wissenschaftliches Rechnen ,
//    - Fritz-Haber-Institut, Berlin, Abt. Theorie,
//    - Max-Plack-Institut für Mathematik in den Naturwissenschaften,
//      Leipzig, Abt. Komplexe Strukutren in Biologie und Kognition,
//      and
//    - IBM Deutschland GmbH
//
//
//    This particular source code file contains additions, changes and
//    enhancements authored by Intel Corporation which is not part of
//    the ELPA consortium.
//
//    More information can be found here:
//    http://elpa.mpcdf.mpg.de/
//
//    ELPA is free software: you can redistribute it and/or modify
//    it under the terms of the version 3 of the license of the
//    GNU Lesser General Public License as published by the Free
//    Software Foundation.
//
//    ELPA 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 Lesser General Public License for more details.
//
//    You should have received a copy of the GNU Lesser General Public License
//    along with ELPA. If not, see <http://www.gnu.org/licenses/>
//
//    ELPA reflects a substantial effort on the part of the original
//    ELPA consortium, and we ask you to respect the spirit of the
//    license that we chose: i.e., please contribute any changes you
//    may have back to the original ELPA library distribution, and keep
//    any derivatives of ELPA under the same license that we chose for
//    the original distribution, the GNU Lesser General Public License.
//
// Author: Andreas Marek, MPCDF

#define  _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <sched.h>
#include <sys/types.h>
#include <unistd.h>


void get_thread_affinity(int *cpu_id) {
  *cpu_id = sched_getcpu();
}

void get_process_affinity(int cpu_id) {
  cpu_set_t set;
  int ret, i;
  int cpu;
  cpu_id = 9999999 ;
  ret = sched_getaffinity(0, sizeof(cpu_set_t), &set);
  for (i=0; i < CPU_SETSIZE; i++)
    {
      cpu = CPU_ISSET(i, &set);
      if (cpu == 1) { cpu_id = i; }
    }
}

void get_process_id(int *process_id, int *pprocess_id) {
  int id;
  *process_id = 0;
  *pprocess_id = 0;
  id = getpid();
  *process_id = id ;
  id = getppid();
  *pprocess_id = id ; 
  //printf("My pid %d \n",*process_id);
  //printf("My ppid %d \n",*pprocess_id);
}