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llvmpipe: Measure the number of cycles taken for blending.
This commit is contained in:
José Fonseca
parent
5778970f15
commit
b94e22e4be
1 changed files with 90 additions and 20 deletions
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@ -59,7 +59,27 @@
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unsigned verbose = 0;
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typedef void (*blend_test_ptr_t)(const void *src, const void *dst, const void *con, void *res);
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typedef int64_t (*blend_test_ptr_t)(const void *src, const void *dst, const void *con, void *res);
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static LLVMValueRef
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read_cycle_counter(LLVMBuilderRef builder)
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{
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const char *name = "llvm.readcyclecounter";
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LLVMModuleRef module = LLVMGetGlobalParent(LLVMGetBasicBlockParent(LLVMGetInsertBlock(builder)));
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LLVMValueRef function;
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function = LLVMGetNamedFunction(module, name);
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if(!function) {
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LLVMTypeRef type = LLVMInt64Type();
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function = LLVMAddFunction(module, name, LLVMFunctionType(type, NULL, 0, 0));
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LLVMSetFunctionCallConv(function, LLVMCCallConv);
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LLVMSetLinkage(function, LLVMExternalLinkage);
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}
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assert(LLVMIsDeclaration(function));
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return LLVMBuildCall(builder, function, NULL, 0, "");
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}
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static LLVMValueRef
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@ -67,6 +87,7 @@ add_blend_test(LLVMModuleRef module,
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const struct pipe_blend_state *blend,
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union lp_type type)
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{
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LLVMTypeRef ret_type;
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LLVMTypeRef vec_type;
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LLVMTypeRef args[4];
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LLVMValueRef func;
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@ -80,11 +101,14 @@ add_blend_test(LLVMModuleRef module,
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LLVMValueRef dst;
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LLVMValueRef con;
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LLVMValueRef res;
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LLVMValueRef start_counter;
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LLVMValueRef end_counter;
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ret_type = LLVMInt64Type();
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vec_type = lp_build_vec_type(type);
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args[3] = args[2] = args[1] = args[0] = LLVMPointerType(vec_type, 0);
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func = LLVMAddFunction(module, "test", LLVMFunctionType(LLVMVoidType(), args, 4, 0));
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func = LLVMAddFunction(module, "test", LLVMFunctionType(LLVMInt64Type(), args, 4, 0));
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LLVMSetFunctionCallConv(func, LLVMCCallConv);
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src_ptr = LLVMGetParam(func, 0);
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dst_ptr = LLVMGetParam(func, 1);
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@ -99,13 +123,17 @@ add_blend_test(LLVMModuleRef module,
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dst = LLVMBuildLoad(builder, dst_ptr, "dst");
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con = LLVMBuildLoad(builder, const_ptr, "const");
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start_counter = read_cycle_counter(builder);
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res = lp_build_blend(builder, blend, type, src, dst, con, 3);
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LLVMSetValueName(res, "res");
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end_counter = read_cycle_counter(builder);
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LLVMBuildStore(builder, res, res_ptr);
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LLVMBuildRetVoid(builder);
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LLVMBuildRet(builder, LLVMBuildSub(builder, end_counter, start_counter, "cycles"));;
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LLVMDisposeBuilder(builder);
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return func;
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@ -362,6 +390,8 @@ test_one(const struct pipe_blend_state *blend,
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char *error = NULL;
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blend_test_ptr_t blend_test_ptr;
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boolean success;
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const unsigned n = 32;
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int64_t cycles[n];
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unsigned i, j, k;
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module = LLVMModuleCreateWithName("test");
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@ -402,7 +432,7 @@ test_one(const struct pipe_blend_state *blend,
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LLVMDumpModule(module);
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success = TRUE;
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for(i = 0; i < 10; ++i) {
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for(i = 0; i < n && success; ++i) {
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if(type.floating && type.width == 32) {
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float src[LP_MAX_VECTOR_LENGTH];
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float dst[LP_MAX_VECTOR_LENGTH];
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@ -419,14 +449,14 @@ test_one(const struct pipe_blend_state *blend,
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for(j = 0; j < type.length; j += 4)
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compute_blend_ref(blend, src + j, dst + j, con + j, ref + j);
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blend_test_ptr(src, dst, con, res);
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cycles[i] = blend_test_ptr(src, dst, con, res);
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for(j = 0; j < type.length; ++j)
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if(fabs(res[j] - ref[j]) > FLT_EPSILON)
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success = FALSE;
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if (!success) {
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fprintf(stderr, "FAILED\n");
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fprintf(stderr, "MISMATCH\n");
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fprintf(stderr, " Result: ");
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for(j = 0; j < type.length; ++j)
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fprintf(stderr, " %f", res[j]);
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@ -468,7 +498,7 @@ test_one(const struct pipe_blend_state *blend,
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ref[j + k] = (uint8_t)(reff[k]*255.0f + 0.5f);
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}
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blend_test_ptr(src, dst, con, res);
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cycles[i] = blend_test_ptr(src, dst, con, res);
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for(j = 0; j < type.length; ++j) {
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int delta = (int)res[j] - (int)ref[j];
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@ -479,7 +509,7 @@ test_one(const struct pipe_blend_state *blend,
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}
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if (!success) {
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fprintf(stderr, "FAILED\n");
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fprintf(stderr, "MISMATCH\n");
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fprintf(stderr, " Result: ");
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for(j = 0; j < type.length; ++j)
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fprintf(stderr, " %3u", res[j]);
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@ -492,14 +522,50 @@ test_one(const struct pipe_blend_state *blend,
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}
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else
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assert(0);
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}
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if (!success) {
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LLVMDumpModule(module);
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LLVMWriteBitcodeToFile(module, "blend.bc");
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fprintf(stderr, "blend.bc written\n");
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abort();
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break;
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/*
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* Unfortunately the output of cycle counter is not very reliable as it comes
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* -- sometimes we get outliers (due IRQs perhaps?) which are
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* better removed to avoid random or biased data.
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*/
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if(verbose >=1 && success) {
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double sum = 0.0, sum2 = 0.0;
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double avg, std;
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unsigned m;
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for(i = 0; i < n; ++i) {
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sum += cycles[i];
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sum2 += cycles[i]*cycles[i];
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}
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avg = sum/n;
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std = sqrtf((sum2 - n*avg*avg)/n);
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m = 0;
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sum = 0.0;
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for(i = 0; i < n; ++i) {
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if(fabs(cycles[i] - avg) <= 4.0*std) {
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sum += cycles[i];
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++m;
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}
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}
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avg = sum/m;
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fprintf(stdout, " cycles=%.1f", avg);
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}
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if(verbose >= 1) {
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fprintf(stdout, " result=%s\n", success ? "pass" : "fail");
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fflush(stdout);
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}
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if (!success) {
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LLVMDumpModule(module);
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LLVMWriteBitcodeToFile(module, "blend.bc");
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fprintf(stderr, "blend.bc written\n");
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abort();
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}
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LLVMFreeMachineCodeForFunction(engine, func);
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@ -594,15 +660,17 @@ test_all(void)
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alpha_dst_factor->value == PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE)
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continue;
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if(verbose >= 1)
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fprintf(stderr,
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"%s=%s %s=%s %s=%s %s=%s %s=%s %s=%s ...\n",
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if(verbose >= 1) {
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fprintf(stdout,
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"%s=%s %s=%s %s=%s %s=%s %s=%s %s=%s",
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"rgb_func", rgb_func->name,
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"rgb_src_factor", rgb_src_factor->name,
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"rgb_dst_factor", rgb_dst_factor->name,
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"alpha_func", alpha_func->name,
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"alpha_src_factor", alpha_src_factor->name,
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"alpha_dst_factor", alpha_dst_factor->name);
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fflush(stdout);
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}
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memset(&blend, 0, sizeof blend);
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blend.blend_enable = 1;
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@ -658,15 +726,17 @@ test_some(unsigned long n)
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for(type = blend_types; type < &blend_types[num_types]; ++type) {
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if(verbose >= 1)
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fprintf(stderr,
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"%s=%s %s=%s %s=%s %s=%s %s=%s %s=%s ...\n",
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if(verbose >= 1) {
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fprintf(stdout,
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"%s=%s %s=%s %s=%s %s=%s %s=%s %s=%s",
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"rgb_func", rgb_func->name,
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"rgb_src_factor", rgb_src_factor->name,
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"rgb_dst_factor", rgb_dst_factor->name,
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"alpha_func", alpha_func->name,
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"alpha_src_factor", alpha_src_factor->name,
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"alpha_dst_factor", alpha_dst_factor->name);
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fflush(stdout);
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}
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memset(&blend, 0, sizeof blend);
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blend.blend_enable = 1;
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