[oe-commits] Michael 'Mickey' Lauer : cpubench: new recipe; simple OpenWRT CPU benchmark

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Module: openembedded.git
Branch: org.openembedded.dev
Commit: f71735cf445f1ff3e3b464853f4f4303bf6f4078
URL:    http://gitweb.openembedded.net/?p=openembedded.git&a=commit;h=f71735cf445f1ff3e3b464853f4f4303bf6f4078

Author: Michael 'Mickey' Lauer <mickey at vanille-media.de>
Date:   Mon Mar 16 21:42:45 2009 +0100

cpubench: new recipe; simple OpenWRT CPU benchmark

---

 packages/cpubench/cpubench_06.bb                |   15 ++
 packages/cpubench/files/openwrt_cpu_bench_v06.c |  227 +++++++++++++++++++++++
 2 files changed, 242 insertions(+), 0 deletions(-)

diff --git a/packages/cpubench/cpubench_06.bb b/packages/cpubench/cpubench_06.bb
new file mode 100644
index 0000000..8273531
--- /dev/null
+++ b/packages/cpubench/cpubench_06.bb
@@ -0,0 +1,15 @@
+DESCRIPTION = "OpenWRT's CPU Benchmark"
+HOMEPAGE = "http://wiki.openwrt.org/HardwarePerformance"
+LICENSE = "GPL"
+SECTION = "devel"
+
+SRC_URI = "file://openwrt_cpu_bench_v06.c"
+
+do_compile() {
+	${CC} -O0 ${LDFLAGS} ${WORKDIR}/openwrt_cpu_bench_v06.c -o cpubench
+}
+
+do_install() {
+	install -d ${D}${bindir}
+	install -m 0755 cpubench ${D}${bindir}
+}
diff --git a/packages/cpubench/files/openwrt_cpu_bench_v06.c b/packages/cpubench/files/openwrt_cpu_bench_v06.c
new file mode 100644
index 0000000..dfb05a8
--- /dev/null
+++ b/packages/cpubench/files/openwrt_cpu_bench_v06.c
@@ -0,0 +1,227 @@
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/time.h>
+#include <time.h>
+#include <unistd.h>
+
+
+
+
+#define VERSION_STR "v0.6"
+
+// This is the overhead of calling gettimeofday() 2 times
+double overhead = -1;
+
+double begin_secs = 0;
+double real_get_seconds()
+{
+	struct timeval tv;
+	double total;
+
+	gettimeofday(&tv, NULL);
+	total = (double)tv.tv_sec;
+	total += ((double)tv.tv_usec)/(double)1000000.0;
+	
+	//printf("Secs: %d / Usecs: %d / FSecs: %f\n", tv.tv_sec, tv.tv_usec, total);
+
+	return total;
+}
+double get_seconds()
+{
+	if (begin_secs == 0)
+	{
+		// First call
+		begin_secs = real_get_seconds();
+	}
+
+	return (real_get_seconds() - begin_secs);
+}
+
+
+double run_float_bench()
+{
+	double secs;
+	double begin = get_seconds();
+	int i;
+
+	double nb=0;
+	for (i=0;i<300000;i++)
+	{
+		nb *= i;
+		int n = i >> 10;
+		nb /= n;
+	}
+	
+	double end = get_seconds();
+	secs = end-begin;
+	printf("Time to run float bench: %.2f[secs]\n", secs);
+
+	return secs;
+}
+
+
+double do_run_memory_bench()
+{
+	double begin, end;
+	int i;
+	int* buf;
+	int len, index;
+	double secs;
+
+       	begin = get_seconds();
+       
+	len = (1<<21)/sizeof(int); // 2Mb
+	buf = malloc(len*sizeof(int));
+
+	// Write to memory - sequential
+	for (i=0;i<len;i++)
+	{
+		buf[i] = i;
+	}
+
+	// Read memory - sequential
+	for (i=0;i<len;i++)
+	{
+		int a = buf[i];
+	}
+
+	// Read memory - random
+	for (i=0;i<len;i++)
+	{
+		index = (i*23)%(len/2);
+		int a = buf[index];
+	}
+
+	// Write memory - random
+	for (i=0;i<len;i++)
+	{
+		index = (i*23)%(len/2);
+		buf[index] = i;
+	}
+	free(buf);
+	
+	end = get_seconds();
+	secs = (end-begin);
+
+	return secs;
+}
+
+double run_memory_bench()
+{
+	double secs = 0;
+	int i;
+
+	for (i=0;i<10;i++)
+	{
+		secs += do_run_memory_bench();
+	}
+
+	printf("Time to run memory bench: %.2f[secs]\n", secs);
+
+	return secs;
+}
+
+#define NBD 9009
+double run_compute_e()
+{
+	double begin, end;
+	double secs;
+
+	begin = get_seconds();
+
+	int N=NBD, n=N, a[NBD],x;
+	while(--n)
+	{
+		a[n]=1+1/n;
+	}
+
+	for(;N>9;)
+	{
+		for(n=N--;--n; a[n]=x%n, x=10*a[n-1]+x/n)
+		{
+		}
+	}
+
+	end = get_seconds();
+
+	secs = (end-begin);
+	printf("Time to run computation of e (%d digits): %.2f[secs]\n", NBD, secs);
+
+	return secs;
+}
+
+double run_compute_pi()
+{
+	double begin, end;
+	double secs;
+	int i;
+
+	begin = get_seconds();
+	//printf("Begin: %f\n", begin);
+
+	for (i=0;i<10;i++)
+	{
+		int a=10000,b=0,c=8400,d=0,e=0,f[8401],g=0;
+
+		//printf("i:%d\n", i);
+		for(;b-c;)
+		{
+			f[b++]=a/5;
+		}
+
+		for(;d=0,g=c*2;c-=14,e=d%a)
+		{
+			for(b=c;d+=f[b]*a,f[b]=d%--g,d/=g--,--b;d*=b)
+			{
+			}
+		}
+		//printf("Mid: %lld\n", (get_seconds()-end));
+	}
+
+	end = get_seconds();
+	//printf("End: %f\n", end);
+
+	secs = (end-begin);
+	printf("Time to run computation of pi (2400 digits, 10 times): %.2f[secs]\n", secs);
+
+	return secs;
+}
+
+int main()
+{
+	printf("This is CPU and memory benchmark for OpenWRT "VERSION_STR". This will then take some time... (typically 30-60 seconds on a 200MHz computer)\n");
+
+	double begin = get_seconds();
+	double end = get_seconds();
+	overhead = (end-begin)*1000000;
+	printf("Overhead for getting time: %.0fus\n", overhead);
+
+
+	// Nb 1
+	double sec_mem = run_memory_bench();
+
+	// Nb 2
+	double sec_pi = run_compute_pi();
+
+	// Nb 3
+	double sec_e = run_compute_e();
+
+	// Nb 4
+	double sec_float = run_float_bench();
+	
+
+
+
+	printf("Total time: %.1fs\n", (sec_mem+sec_e+sec_pi+sec_float));
+
+	time_t t = time(0);
+	struct tm ti;
+       	localtime_r(&t, &ti);
+	printf("\nYou can copy/paste the following line in the wiki table at: http://wiki.openwrt.org/HardwarePerformance\n");
+
+	printf("|| %04d-%02d-%02d || ''Author'' || %.1fs || %.1fs || %.1fs || %.1fs || " VERSION_STR " || ''OS'' || ''DeviceModel'' || ''CPU model'' || ''CPU Frequency'' || ''LinkToHwPage'' ||\n", (ti.tm_year+1900), (ti.tm_mon+1), ti.tm_mday, sec_mem, sec_pi, sec_e, sec_float);
+
+	return 0;
+}
+