From 5862441351f4b90c825cb6b50b0ba12aec4f476d Mon Sep 17 00:00:00 2001
From: Jonas 'Sortie' Termansen <sortie@maxsi.org>
Date: Fri, 2 Dec 2011 12:27:58 +0100
Subject: [PATCH] Added a system calls per second benchmark.

---
 Makefile               |  2 +-
 bench/.gitignore       |  1 +
 bench/Makefile         | 26 ++++++++++++++++++++++++++
 bench/benchsyscall.cpp | 14 ++++++++++++++
 4 files changed, 42 insertions(+), 1 deletion(-)
 create mode 100644 bench/.gitignore
 create mode 100644 bench/Makefile
 create mode 100644 bench/benchsyscall.cpp

diff --git a/Makefile b/Makefile
index f5de498a..e95b09d6 100644
--- a/Makefile
+++ b/Makefile
@@ -16,7 +16,7 @@ endif
 REMOTE=192.168.2.6
 REMOTEUSER=sortie
 REMOTECOPYDIR:=/home/$(REMOTEUSER)/Desktop/MaxsiOS
-MODULES=libmaxsi games mkinitrd utils sortix
+MODULES=libmaxsi games mkinitrd utils bench sortix
 
 VERSION=0.5dev
 DEBNAME:=sortix_$(VERSION)_$(CPU)
diff --git a/bench/.gitignore b/bench/.gitignore
new file mode 100644
index 00000000..5761abcf
--- /dev/null
+++ b/bench/.gitignore
@@ -0,0 +1 @@
+*.o
diff --git a/bench/Makefile b/bench/Makefile
new file mode 100644
index 00000000..88aa51c5
--- /dev/null
+++ b/bench/Makefile
@@ -0,0 +1,26 @@
+# Set up variables such that we can easily cross-compile.
+OSROOT=..
+include ../crosscompilemakefile.mak
+
+INITRDDIR:=../initrd
+LOCALBINARIES:=\
+benchsyscall \
+
+BINARIES:=$(addprefix $(INITRDDIR)/,$(LOCALBINARIES))
+
+all: install
+
+install: $(LOCALBINARIES)
+	cp $(LOCALBINARIES) $(INITRDDIR)
+	rm -f $(LOCALBINARIES)
+
+%: %.cpp
+	$(CXX) $(CPPFLAGS) $(CXXFLAGS) -O2 -c $< -o $@.o
+	$(LD) $(LDFLAGS) $@.o -o $@ $(LIBS)
+
+sh: mxsh
+	cp $< $@
+
+clean:
+	rm -f $(BINARIES) $(LOCALBINARIES) *.o
+
diff --git a/bench/benchsyscall.cpp b/bench/benchsyscall.cpp
new file mode 100644
index 00000000..1201b106
--- /dev/null
+++ b/bench/benchsyscall.cpp
@@ -0,0 +1,14 @@
+#include <stdio.h>
+#include <unistd.h>
+
+int main(int argc, char* argv[])
+{
+	uintmax_t start;
+	if ( uptime(&start) ) { perror("uptime"); return 1; }
+	uintmax_t end = start + 1ULL * 1000ULL; // 1 second
+	size_t count = 0;
+	uintmax_t now;
+	while ( !uptime(&now) && now < end ) { count++; }
+	printf("Made %zu system calls in 1 second\n", count);
+	return 0;
+}