/*    Filename: chng_cpu.stp
 *      Author: Ankita Garg <ankita@in.ibm.com>
 * Description: Captures information on the number of times an executable
 * switches cpu
 *
 * 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 2 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.
 *
 * Copyright (C) IBM Corp. 2009.  All Rights Reserved.
 *
 */

global threads

probe scheduler.cpu_on
{
  if ((threads[tid()] != cpu()) && (tid() != 0) && (execname() == @1)) {
    printf("thread %d (%s) context switched on %d \n",
           tid(), execname(), cpu());
    printf("state: %d\n", task_state(task_current()))
    print_stack(backtrace())
  }
  threads[tid()] = cpu();
}