progs/tests/api_speed.c

   1 /*
   2  * (C) Copyright IBM Corporation 2002
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * on the rights to use, copy, modify, merge, publish, distribute, sub
   9  * license, and/or sell copies of the Software, and to permit persons to whom
  10  * the Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
  19  * VA LINUX SYSTEM, IBM AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  20  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  21  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  22  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 /**
  26  * \file api_speed.c
  27  * Simple test to measure the overhead of making GL calls.
  28  *
  29  * The main purpose of this test is to measure the difference in calling
  30  * overhead of different dispatch methods.  Since it uses asm/timex.h to
  31  * access the Pentium's cycle counters, it will probably only compile on
  32  * Linux (though most architectures have a get_cycles function in timex.h).
  33  * That is why it isn't in the default Makefile.
  34  *
  35  * \author Ian Romanick <idr@us.ibm.com>
  36  */
  37
  38 #include <stdio.h>
  39 #include <stdlib.h>
  40 #include <GL/glew.h>
  41 #include <GL/glut.h>
  42
  43 #define inline __inline__
  44 #include <asm/timex.h>
  45
  46 static float Width = 400;
  47 static float Height = 400;
  48 static unsigned count = 1000000;
  49
  50
  51 static void Idle( void )
  52 {
  53    glutPostRedisplay();
  54 }
  55
  56 #define DO_FUNC(f,p) \
  57    do { \
  58       t0 = get_cycles(); \
  59       for ( i = 0 ; i < count ; i++ ) { \
  60          f p ; \
  61       } \
  62       t1 = get_cycles(); \
  63       printf("%u calls to % 20s required %llu cycles.\n", count, # f, t1 - t0); \
  64    } while( 0 )
  65
  66 /**
  67  * Main display function.  This is the place to add more API calls.
  68  */
  69 static void Display( void )
  70 {
  71    int i;
  72    const float v[3] = { 1.0, 0.0, 0.0 };
  73    cycles_t t0;
  74    cycles_t t1;
  75
  76    glBegin(GL_TRIANGLE_STRIP);
  77
  78    DO_FUNC( glColor3fv, (v) );
  79    DO_FUNC( glNormal3fv, (v) );
  80    DO_FUNC( glTexCoord2fv, (v) );
  81    DO_FUNC( glTexCoord3fv, (v) );
  82    DO_FUNC( glMultiTexCoord2fv, (GL_TEXTURE0, v) );
  83    DO_FUNC( glMultiTexCoord2f, (GL_TEXTURE0, 0.0, 0.0) );
  84    DO_FUNC( glFogCoordfvEXT, (v) );
  85    DO_FUNC( glFogCoordfEXT, (0.5) );
  86
  87    glEnd();
  88
  89    exit(0);
  90 }
  91
  92
  93 static void Reshape( int width, int height )
  94 {
  95    Width = width;
  96    Height = height;
  97    glViewport( 0, 0, width, height );
  98    glMatrixMode( GL_PROJECTION );
  99    glLoadIdentity();
 100    glOrtho(0.0, width, 0.0, height, -1.0, 1.0);
 101    glMatrixMode( GL_MODELVIEW );
 102    glLoadIdentity();
 103 }
 104
 105
 106 static void Key( unsigned char key, int x, int y )
 107 {
 108    (void) x;
 109    (void) y;
 110    switch (key) {
 111       case 27:
 112          exit(0);
 113          break;
 114    }
 115    glutPostRedisplay();
 116 }
 117
 118
 119 int main( int argc, char *argv[] )
 120 {
 121    glutInit( &argc, argv );
 122    glutInitWindowSize( (int) Width, (int) Height );
 123    glutInitWindowPosition( 0, 0 );
 124
 125    glutInitDisplayMode( GLUT_RGB );
 126
 127    glutCreateWindow( argv[0] );
 128    glewInit();
 129
 130    if ( argc > 1 ) {
 131       count = strtoul( argv[1], NULL, 0 );
 132       if ( count == 0 ) {
 133          fprintf( stderr, "Usage: %s [iterations]\n", argv[0] );
 134          exit(1);
 135       }
 136    }
 137
 138    glutReshapeFunc( Reshape );
 139    glutKeyboardFunc( Key );
 140    glutDisplayFunc( Display );
 141    glutIdleFunc( Idle );
 142
 143    glutMainLoop();
 144    return 0;
 145 }