cpubench: new recipe; simple OpenWRT CPU benchmark

diff --git a/packages/cpubench/cpubench_06.bb b/packages/cpubench/cpubench_06.bb
new file mode 100644 (file)
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 (file)
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;
+}
+