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