diff options
| author | Brian Paul <[email protected]> | 2009-09-16 19:33:01 -0600 |
|---|---|---|
| committer | Brian Paul <[email protected]> | 2009-09-16 19:33:01 -0600 |
| commit | 9abbedad09c2501285d2edb00cba7e8e6549c5ba (patch) | |
| tree | 113ca0f873db469d6ec47aae9e4eba9081b52f01 /progs/perf/vbo.c | |
| parent | 4df2f7af5e9b2c00ead92fe0ae49ed8491aef1d0 (diff) | |
progs/perf: initial set of simple performance test programs
Initial tests include:
drawoverhead - measure overhead of state changes w.r.t drawing commands
teximage - measure glTexImage2D() and glTexSubImage2D() speed
vbo - measure glBufferData() and glBufferSubData() speed
vertexrate - measure vertex rate for immediate mode, glDrawArrays, VBOs, etc.
Diffstat (limited to 'progs/perf/vbo.c')
| -rw-r--r-- | progs/perf/vbo.c | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/progs/perf/vbo.c b/progs/perf/vbo.c new file mode 100644 index 00000000000..8545a33b7e3 --- /dev/null +++ b/progs/perf/vbo.c @@ -0,0 +1,138 @@ +/*
+ * Copyright (C) 2009 VMware, Inc. All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * VMWARE BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/**
+ * Measure VBO upload speed.
+ * That is, measure glBufferDataARB() and glBufferSubDataARB().
+ *
+ * Brian Paul
+ * 16 Sep 2009
+ */
+
+#include <string.h>
+#include "glmain.h"
+#include "common.h"
+
+
+int WinWidth = 100, WinHeight = 100;
+
+static GLuint VBO;
+
+static GLsizei VBOSize = 0;
+static GLubyte *VBOData = NULL;
+
+static const GLboolean DrawPoint = GL_TRUE;
+static const GLboolean BufferSubDataInHalves = GL_TRUE;
+
+static const GLfloat Vertex0[2] = { 0.0, 0.0 };
+
+
+/** Called from test harness/main */
+void
+PerfInit(void)
+{
+ /* setup VBO */
+ glGenBuffersARB(1, &VBO);
+ glBindBufferARB(GL_ARRAY_BUFFER_ARB, VBO);
+ glVertexPointer(2, GL_FLOAT, sizeof(Vertex0), (void *) 0);
+ glEnableClientState(GL_VERTEX_ARRAY);
+}
+
+
+static void
+UploadVBO(unsigned count)
+{
+ unsigned i;
+ for (i = 0; i < count; i++) {
+ glBufferDataARB(GL_ARRAY_BUFFER, VBOSize, VBOData, GL_STREAM_DRAW_ARB);
+
+ if (DrawPoint)
+ glDrawArrays(GL_POINTS, 0, 1);
+ }
+ glFinish();
+}
+
+
+static void
+UploadSubVBO(unsigned count)
+{
+ unsigned i;
+ for (i = 0; i < count; i++) {
+ if (BufferSubDataInHalves) {
+ GLsizei half = VBOSize / 2;
+ glBufferSubDataARB(GL_ARRAY_BUFFER, 0, half, VBOData);
+ glBufferSubDataARB(GL_ARRAY_BUFFER, half, half, VBOData + half);
+ }
+ else {
+ glBufferSubDataARB(GL_ARRAY_BUFFER, 0, VBOSize, VBOData);
+ }
+
+ if (DrawPoint)
+ glDrawArrays(GL_POINTS, 0, 1);
+ }
+ glFinish();
+}
+
+
+static const GLsizei Sizes[] = {
+ 64,
+ 1024,
+ 16*1024,
+ 256*1024,
+ 1024*1024,
+ 16*1024*1024,
+ 0 /* end of list */
+};
+
+
+/** Called from test harness/main */
+void
+PerfDraw(void)
+{
+ double rate, mbPerSec;
+ int sub, sz;
+
+ /* loop over whole/sub buffer upload */
+ for (sub = 0; sub < 2; sub++) {
+
+ /* loop over VBO sizes */
+ for (sz = 0; Sizes[sz]; sz++) {
+ VBOSize = Sizes[sz];
+
+ VBOData = malloc(VBOSize);
+ memcpy(VBOData, Vertex0, sizeof(Vertex0));
+
+ if (sub)
+ rate = PerfMeasureRate(UploadSubVBO);
+ else
+ rate = PerfMeasureRate(UploadVBO);
+
+ mbPerSec = rate * VBOSize / (1024.0 * 1024.0);
+
+ printf(" glBuffer%sDataARB(size = %d): %.1f MB/sec\n",
+ (sub ? "Sub" : ""), VBOSize, mbPerSec);
+
+ free(VBOData);
+ }
+ }
+
+ exit(0);
+}
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