early-access version 1255

externals/xbyak/sample/profiler.cpp

@@ -0,0 +1,90 @@
+/*
+	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");
+}