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#1 2009-11-17 09:59:55

hippo
天使
註冊日期: 2008-10-07
文章數: 1562
目前積分 :   20 

編譯cpubench, 測試效能(CPU and memory benchmark)

參考站長所寫的效能測試 (CPU and memory benchmark), 取得原始碼, 經由gcc編譯後, 產生執行檔cpubench, 測試NAS的CPU and memory benchmark.

型號: DS209+II
韌體: DSM 2.2-0942

1.) 安裝gcc

> ipkg-opt install gcc


威聯通TS-109 Pro要使用cs05q3armel feed, 才有gcc.

2.) openwrt_cpu_bench_v06.c
來源

#include #include #include #include #include #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; }


將上面的原始碼, 複製到nano或vi編輯器, 注意斷行問題, 存檔為openwrt_cpu_bench_v06.c
3.) 編譯, 產生執行檔cpubench

> gcc -o cpubench openwrt_cpu_bench_v06.c


編譯過程若產生錯誤, 依錯誤訊息修正原始碼.
4.) 執行

> ./cpubench


DS209+II CPU benchmark




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