text: /*
   * BSD LICENSE
   *
   * Copyright(c) 2016-2018 Intel Corporation. All rights reserved.
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   *   * Redistributions of source code must retain the above copyright
   *     notice, this list of conditions and the following disclaimer.
   *   * Redistributions in binary form must reproduce the above copyright
   *     notice, this list of conditions and the following disclaimer in
   *     the documentation and/or other materials provided with the
   *     distribution.
   *   * Neither the name of Intel Corporation nor the names of its
   *     contributors may be used to endorse or promote products derived
   *     from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #include <stdio.h>   /* vsnprintf() */
  #include <stdarg.h>  /* va_start(), va_end() */
  #include <limits.h>  /* ULONG_MAX */
  #include <string.h>  /* memset() */
  #include "tsc.h"
  
  static const double __measurement_cost = 0;
  
  void tsc_init(struct tsc_prof *p, const char *name, ...)
  {
          va_list ap;
  
          va_start(ap, name);
          memset(p->name, 0, sizeof(p->name));
          vsnprintf(p->name, sizeof(p->name) - 1, name, ap);
          va_end(ap);
  
          p->clk_avg = 0;
          p->clk_avgc = 0;
          p->clk_result = 0.0;
          p->clk_max = 0.0;
          p->clk_min = (double) ULONG_MAX;
          p->cost = __measurement_cost;
  }
  
  void tsc_print(struct tsc_prof *p)
  {
          tsc_get_avg(p);
  
          printf("[%s] work items %llu; cycles per work item: "
                 "avg=%.3f min=%.3f max=%.3f jitter=%.3f\n",
                 p->name, (unsigned long long)p->clk_avgc,
                 p->clk_result, p->clk_min, p->clk_max, p->clk_max - p->clk_min);
  }
  