vg_profiler.h

   1 #ifndef VG_PROFILER_H
   2 #define VG_PROFILER_H
   3
   4 #define VG_GAME
   5 #include "vg.h"
   6 #include "vg_platform.h"
   7
   8 #define VG_PROFILE_SAMPLE_COUNT 128
   9
  10 static int vg_profiler = 0;
  11
  12 struct vg_profile
  13 {
  14    const char *name;
  15
  16    u64    samples[ VG_PROFILE_SAMPLE_COUNT ];
  17    u32    buffer_count, buffer_current;
  18
  19    enum profile_mode
  20    {
  21       k_profile_mode_frame,
  22       k_profile_mode_accum
  23    }
  24    mode;
  25
  26    u64 start;
  27 };
  28
  29 static void vg_profile_begin( struct vg_profile *profile )
  30 {
  31    profile->start = SDL_GetPerformanceCounter();
  32 }
  33
  34 static void vg_profile_increment( struct vg_profile *profile )
  35 {
  36    profile->buffer_current ++;
  37
  38    if( profile->buffer_count < VG_PROFILE_SAMPLE_COUNT )
  39       profile->buffer_count ++;
  40
  41    if( profile->buffer_current >= VG_PROFILE_SAMPLE_COUNT )
  42       profile->buffer_current = 0;
  43
  44    profile->samples[ profile->buffer_current ] = 0;
  45 }
  46
  47 static void vg_profile_end( struct vg_profile *profile )
  48 {
  49    u64 time_end = SDL_GetPerformanceCounter(),
  50        delta    = time_end - profile->start;
  51
  52    if( profile->mode == k_profile_mode_frame ){
  53       profile->samples[ profile->buffer_current ] = delta;
  54       vg_profile_increment( profile );
  55    }
  56    else{
  57       profile->samples[ profile->buffer_current ] += delta;
  58    }
  59 }
  60
  61 static void vg_profile_drawn( struct vg_profile **profiles, u32 count,
  62                               float budget, ui_rect panel, u32 colour_offset,
  63                               int dir )
  64 {
  65    if( panel[2] == 0 )
  66       panel[2] = 256;
  67
  68    if( panel[3] == 0 )
  69       panel[3] = VG_PROFILE_SAMPLE_COUNT * 2;
  70
  71    f32 sh = (f32)panel[3^dir] / (f32)VG_PROFILE_SAMPLE_COUNT,
  72        sw = (f32)panel[2^dir];
  73
  74    ui_fill( panel, 0xa0000000 );
  75
  76    assert( count <= 8 );
  77    f64 avgs[8];
  78    int ptrs[8];
  79
  80    for( int i=0; i<count; i++ ){
  81 #if 0
  82       ptrs[i] = profiles[i]->buffer_current;
  83 #else
  84       ptrs[i] = 0;
  85 #endif
  86       avgs[i] = 0.0f;
  87    }
  88
  89    u32 colours[] = { 0xff0000ff, 0xff00ff00, 0xff00ffff, 0xffff0000,
  90                      0xffff00ff, 0xffffff00 };
  91
  92    f64 rate_mul = 1000.0 / (f64)SDL_GetPerformanceFrequency();
  93
  94    for( int i=0; i<VG_PROFILE_SAMPLE_COUNT-1; i++ ){
  95       f64 total = 0.0;
  96
  97       for( int j=0; j<count; j++ ){
  98 #if 0
  99          ptrs[j] --;
 100
 101          if( ptrs[j] < 0 )
 102             ptrs[j] = VG_PROFILE_SAMPLE_COUNT-1;
 103 #else
 104          ptrs[j] ++;
 105 #endif
 106
 107          f64 sample  = (f64)profiles[j]->samples[ptrs[j]] * rate_mul,
 108                 px   = (total  / (budget)) * sw,
 109                 wx   = (sample / (budget)) * sw;
 110
 111          ui_rect block;
 112          block[0^dir] = panel[0^dir] + px;
 113          block[1^dir] = panel[1^dir] + (f32)i*sh;
 114          block[2^dir] = wx;
 115          block[3^dir] = ceilf(sh)-1;
 116
 117          u32 colour = colours[ (j+colour_offset) % vg_list_size(colours) ];
 118          ui_fill( block, colour );
 119
 120          total += sample;
 121          avgs[j] += sample;
 122       }
 123    }
 124
 125    char infbuf[64];
 126
 127    snprintf( infbuf, 64, "accuracy: %.7fms", rate_mul );
 128    ui_text( (ui_rect){ panel[0] + 4,
 129                        panel[1] + panel[3] - 14, 500, 30 },
 130                        infbuf,
 131                        1,
 132                        k_ui_align_left, 0 );
 133
 134    for( int i=0; i<count; i++ ){
 135       snprintf( infbuf, 64, "%.4fms %s",
 136                         avgs[i] * (1.0f/(VG_PROFILE_SAMPLE_COUNT-1)),
 137                         profiles[i]->name );
 138
 139       ui_text( (ui_rect){ panel[0] + panel[2] + 4,
 140                           panel[1] + i * 14, 0, 0 },
 141                           infbuf,
 142                           1,
 143                           k_ui_align_left, 0 );
 144    }
 145 }
 146
 147 static void vg_profiler_init(void)
 148 {
 149    VG_VAR_I32( vg_profiler, flags=VG_VAR_PERSISTENT );
 150 }
 151
 152 #endif /* VG_PROFILER_H */