chiark - git - mdw - mLib/blob - test/example/bench.c

   1 /* -*-c-*-
   2  *
   3  * Demonstration of standalone benchmarking
   4  *
   5  * (c) 2024 Straylight/Edgeware
   6  */
   7
   8 /*----- Licensing notice --------------------------------------------------*
   9  *
  10  * This file is part of the mLib utilities library.
  11  *
  12  * mLib is free software: you can redistribute it and/or modify it under
  13  * the terms of the GNU Library General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or (at
  15  * your option) any later version.
  16  *
  17  * mLib is distributed in the hope that it will be useful, but WITHOUT
  18  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  19  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
  20  * License for more details.
  21  *
  22  * You should have received a copy of the GNU Library General Public
  23  * License along with mLib.  If not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  25  * USA.
  26  */
  27
  28 /*----- Header files ------------------------------------------------------*/
  29
  30 #include <stdio.h>
  31 #include <stdlib.h>
  32
  33 #include "macros.h"
  34 #include "report.h"
  35 #include "tvec.h"
  36 #include "tvec-adhoc.h"
  37 #include "tvec-bench.h"
  38 #include "tvec-types.h"
  39
  40 #include "example.h"
  41
  42 /*----- Macro from the manpage --------------------------------------------*/
  43
  44 #define BENCHMARK_DECLS                                                 \
  45   struct bench_timing _bmark_t;                                         \
  46   int _bmark_rc;                                                        \
  47   BENCH_MEASURE_DECLS
  48
  49 #define BENCHMARK_TAG(tag, b, unit, base)                               \
  50   MC_BEFORE(tag##__benchmark_before, { fflush(stdout); })               \
  51   MC_AFTER(tag##__benchmark_after, {                                    \
  52     if (_bmark_rc)                                                      \
  53       printf(": FAILED\n");                                             \
  54     else {                                                              \
  55       fputs(": ", stdout);                                              \
  56       bench_report(&file_printops, stdout, (unit), &_bmark_t);          \
  57       putchar('\n');                                                    \
  58     }                                                                   \
  59   })                                                                    \
  60   BENCH_MEASURE_TAG(tag##__benchmark_measure,                           \
  61                     (b), _bmark_rc, &_bmark_t, (base))
  62 #define BENCHMARK(b, unit, base) BENCHMARK_TAG(bench, b, unit, base)
  63
  64 /*----- Main code ---------------------------------------------------------*/
  65
  66 int main(void)
  67 {
  68   struct bench_state b;
  69   BENCHMARK_DECLS;
  70
  71   if (bench_init(&b, 0))
  72     { fprintf(stderr, "timer setup failed\n"); exit(2); }
  73   if (bench_calibrate(&b, 0))
  74     { fprintf(stderr, "timer calibration failed\n"); exit(2); }
  75
  76   printf("recfib, n = %u", RECFIBLIMIT);
  77   BENCHMARK(&b, BTU_OP, 1)
  78     while (_bench_n--) ADMIRE(recfib(RECFIBLIMIT));
  79
  80   printf("iterfib, n = %u", FIBLIMIT);
  81   BENCHMARK(&b, BTU_OP, 1)
  82     while (_bench_n--) ADMIRE(iterfib(FIBLIMIT));
  83
  84   printf("expfib, n = %u", FIBLIMIT);
  85   BENCHMARK(&b, BTU_OP, 1)
  86     while (_bench_n--) ADMIRE(expfib(FIBLIMIT));
  87
  88   return (0);
  89 }
  90
  91 /*----- That's all, folks -------------------------------------------------*/