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Cleanups to deferred shading workload

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This commit is contained in:
Matt Pharr
2011-09-30 20:35:42 -07:00
parent 9de34eb22c
commit 65c50b60fc
5 changed files with 87 additions and 49 deletions
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73
examples/deferred/main.cpp
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@@ -58,10 +58,45 @@
#include "deferred.h"
#include "kernels_ispc.h"
#include "../timing.h"
#include "../cpuid.h"
///////////////////////////////////////////////////////////////////////////
// Make sure that the vector ISA used during compilation is supported by
// the processor. The ISPC_TARGET_* macro is set in the ispc-generated
// header file that we include above.
static void
ensureTargetISAIsSupported() {
#if defined(ISPC_TARGET_SSE2)
bool isaSupported = CPUSupportsSSE2();
const char *target = "SSE2";
#elif defined(ISPC_TARGET_SSE4)
bool isaSupported = CPUSupportsSSE4();
const char *target = "SSE4";
#elif defined(ISPC_TARGET_AVX)
bool isaSupported = CPUSupportsAVX();
const char *target = "AVX";
#else
#error "Unknown ISPC_TARGET_* value"
#endif
if (!isaSupported) {
fprintf(stderr, "***\n*** Error: the ispc-compiled code uses the %s instruction "
"set, which isn't\n*** supported by this computer's CPU!\n", target);
fprintf(stderr, "***\n*** Please modify the "
#ifdef _MSC_VER
"MSVC project file "
#else
"Makefile "
#endif
"to select another target (e.g. sse2)\n***\n");
exit(1);
}
}
int main(int argc, char** argv) {
ensureTargetISAIsSupported();
if (argc != 2) {
printf("usage: deferred_shading <input_file (e.g. data/pp1280x720.bin)>\n");
return 1;
@@ -77,9 +112,9 @@ int main(int argc, char** argv) {
input->header.framebufferHeight);
InitDynamicC(input);
#ifdef __cilkplusplus
#ifdef __cilk
InitDynamicCilk(input);
#endif // __cilkplusplus
#endif // __cilk
int nframes = 5;
double ispcCycles = 1e30;
@@ -98,20 +133,7 @@ int main(int argc, char** argv) {
input->header.framebufferWidth, input->header.framebufferHeight);
WriteFrame("deferred-ispc-static.ppm", input, framebuffer);
double serialCycles = 1e30;
for (int i = 0; i < 5; ++i) {
framebuffer.clear();
reset_and_start_timer();
for (int j = 0; j < nframes; ++j)
DispatchDynamicC(input, &framebuffer);
double mcycles = get_elapsed_mcycles() / nframes;
serialCycles = std::min(serialCycles, mcycles);
}
printf("[C++ serial dynamic, 1 core]:\t[%.3f] million cycles\n",
serialCycles);
WriteFrame("deferred-serial-dynamic.ppm", input, framebuffer);
#ifdef __cilkplusplus
#ifdef __cilk
double dynamicCilkCycles = 1e30;
for (int i = 0; i < 5; ++i) {
framebuffer.clear();
@@ -121,15 +143,30 @@ int main(int argc, char** argv) {
double mcycles = get_elapsed_mcycles() / nframes;
dynamicCilkCycles = std::min(dynamicCilkCycles, mcycles);
}
printf("[ispc + Cilk dynamic]:\t\t[%.3f] million cycles\n",
printf("[ispc + Cilk dynamic]:\t\t[%.3f] million cycles to render image\n",
dynamicCilkCycles);
WriteFrame("deferred-ispc-dynamic.ppm", input, framebuffer);
#endif // __cilk
double serialCycles = 1e30;
for (int i = 0; i < 5; ++i) {
framebuffer.clear();
reset_and_start_timer();
for (int j = 0; j < nframes; ++j)
DispatchDynamicC(input, &framebuffer);
double mcycles = get_elapsed_mcycles() / nframes;
serialCycles = std::min(serialCycles, mcycles);
}
printf("[C++ serial dynamic, 1 core]:\t[%.3f] million cycles to render image\n",
serialCycles);
WriteFrame("deferred-serial-dynamic.ppm", input, framebuffer);
#ifdef __cilk
printf("\t\t\t\t(%.2fx speedup from static ISPC, %.2fx from Cilk+ISPC)\n",
serialCycles/ispcCycles, serialCycles/dynamicCilkCycles);
#else
printf("\t\t\t\t(%.2fx speedup from ISPC)\n", serialCycles/ispcCycles);
#endif // __cilkplusplus
#endif // __cilk
DeleteInputData(input);