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#include "Halide.h"
#include <stdio.h>
using namespace Halide;
float percentage = 0;
float ms = 0;
void my_print(JITUserContext *, const char *msg) {
float this_ms;
float this_percentage;
int val = sscanf(msg, " fn13: %fms (%f", &this_ms, &this_percentage);
if (val != 2) {
val = sscanf(msg, " fn13$1: %fms (%f", &this_ms, &this_percentage);
}
if (val == 2) {
ms = this_ms;
percentage = this_percentage;
}
}
int run_test(bool use_timer_profiler) {
ms = 0;
// Make a long chain of finely-interleaved Funcs, of which one is very expensive.
Func f[30];
Var c, x;
for (int i = 0; i < 30; i++) {
f[i] = Func("fn" + std::to_string(i));
if (i == 0) {
f[i](c, x) = cast<float>(x + c);
} else if (i == 13) {
Expr e = f[i - 1](c, x);
for (int j = 0; j < 200; j++) {
e = sin(e);
}
f[i](c, x) = e;
} else {
f[i](c, x) = f[i - 1](c, x) * 2.0f;
}
}
Func out;
out(c, x) = 0.0f;
const int iters = 100;
RDom r(0, iters);
out(c, x) += r * f[29](c, x);
out.jit_handlers().custom_print = my_print;
out.compute_root();
out.update().reorder(c, x, r);
for (int i = 0; i < 30; i++) {
f[i].compute_at(out, x);
}
Target t = get_jit_target_from_environment()
.with_feature(use_timer_profiler ? Target::ProfileByTimer : Target::Profile);
Buffer<float> im = out.realize({10, 1000}, t);
// out.compile_to_assembly("/dev/stdout", {}, t.with_feature(Target::JIT));
printf("Time spent in fn13: %fms\n", ms);
if (percentage < 40.0f) {
printf("Percentage of runtime spent in f13: %.1f%%\n"
"This is suspiciously low. It should be more like 66%%\n",
percentage);
return 1;
}
return 0;
}
int main(int argc, char **argv) {
Target target = get_jit_target_from_environment();
if (target.arch == Target::WebAssembly) {
printf("[SKIP] Performance tests are meaningless and/or misleading under WebAssembly interpreter.\n");
return 0;
}
printf("Testing thread based profiler.\n");
int result = run_test(false);
if (result != 0) {
return 1;
}
if (get_jit_target_from_environment().os == Target::Linux) {
printf("Testing timer based profiler.\n");
result = run_test(true);
if (result != 0) {
return 1;
}
}
printf("Success!\n");
return 0;
}
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