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/*
How to profile JIT-code with perf or VTune
sudo perf record ./profiler 1
amplxe-cl -collect hotspots -result-dir r001hs -quiet ./profiler-vtune 2
*/
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <xbyak/xbyak_util.h>
const int N = 3000000;
struct Code : public Xbyak::CodeGenerator {
Code()
{
mov(eax, N);
Xbyak::Label lp = L();
for (int i = 0; i < 10; i++) {
sub(eax, 1);
}
jg(lp);
mov(eax, 1);
ret();
}
};
struct Code2 : public Xbyak::CodeGenerator {
Code2()
{
mov(eax, N);
Xbyak::Label lp = L();
for (int i = 0; i < 10; i++) {
xorps(xm0, xm0);
}
sub(eax, 1);
jg(lp);
mov(eax, 1);
ret();
}
};
double s1(int n)
{
double r = 0;
for (int i = 0; i < n; i++) {
r += 1.0 / (i + 1);
}
return r;
}
double s2(int n)
{
double r = 0;
for (int i = 0; i < n; i++) {
r += 1.0 / (i * i + 1) + 2.0 / (i + 3);
}
return r;
}
int main(int argc, char *argv[])
{
int mode = argc == 1 ? 0 : atoi(argv[1]);
Code c;
Code2 c2;
int (*f)() = (int (*)())c.getCode();
int (*g)() = (int (*)())c2.getCode();
printf("f:%p, %d\n", (const void*)f, (int)c.getSize());
printf("g:%p, %d\n", (const void*)g, (int)c2.getSize());
Xbyak::util::Profiler prof;
printf("mode=%d\n", mode);
prof.init(mode);
prof.set("f", (const void*)f, c.getSize());
prof.set("g", (const void*)g, c2.getSize());
double sum = 0;
for (int i = 0; i < 20000; i++) {
sum += s1(i);
sum += s2(i);
}
printf("sum=%f\n", sum);
for (int i = 0; i < 2000; i++) {
sum += f();
}
printf("f=%f\n", sum);
for (int i = 0; i < 2000; i++) {
sum += g();
}
printf("g=%f\n", sum);
puts("end");
}
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