mdw@git.distorted.org.uk Git - mLib/blob - test/bench.h

   1 /* -*-c-*-
   2  *
   3  * Benchmarking support
   4  *
   5  * (c) 2023 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 #ifndef MLIB_BENCH_H
  29 #define MLIB_BENCH_H
  30
  31 #ifdef __cplusplus
  32   extern "C" {
  33 #endif
  34
  35 /*----- Header files ------------------------------------------------------*/
  36
  37 #ifndef MLIB_BITS_H
  38 #  include "bits.h"
  39 #endif
  40
  41 /*----- Data structures ---------------------------------------------------*/
  42
  43 struct bench_time {
  44   unsigned f;
  45 #define BTF_TIMEOK 1u
  46 #define BTF_CYOK 2u
  47 #define BTF_ANY (BTF_TIMEOK | BTF_CYOK)
  48   kludge64 s; uint32 ns;
  49   kludge64 cy;
  50 };
  51
  52 struct bench_timing {
  53   unsigned f;
  54   double n, t, cy;
  55 };
  56
  57 struct bench_timer { const struct bench_timerops *ops; };
  58
  59 struct bench_timerops {
  60   void (*now)(struct bench_timer */*bt*/, struct bench_time */*t_out*/);
  61   void (*destroy)(struct bench_timer */*bt*/);
  62 };
  63
  64 struct bench_state {
  65   struct bench_timer *tm;
  66   double target_s;
  67   unsigned f;
  68   struct { double m, c; } clk, cy;
  69 };
  70
  71 typedef void bench_fn(unsigned long /*n*/, void */*p*/);
  72
  73 /*----- Functions provided ------------------------------------------------*/
  74
  75 extern struct bench_timer *bench_createtimer(void);
  76
  77 extern void bench_init(struct bench_state */*b*/,
  78                        struct bench_timer */*tm*/);
  79
  80 extern void bench_destroy(struct bench_state */*b*/);
  81
  82 extern int bench_calibrate(struct bench_state */*b*/);
  83
  84 extern int bench_measure(struct bench_timing */*t_out*/,
  85                          struct bench_state */*b*/,
  86                          double /*base*/, bench_fn */*fn*/, void */*p*/);
  87
  88 /*----- That's all, folks -------------------------------------------------*/
  89
  90 #ifdef __cplusplus
  91   }
  92 #endif
  93
  94 #endif