Linux编程：测试-高效内存复制与随机数生成的性能

#include <gtk/gtk.h>
#include <glib.h>
#include <stdlib.h>

#define MAX_SIZE       1024

void Comput_Print_Result(gchar *str, guint loops, GTimeVal tStart);

int main(int argc, char **argv)
{
    guchar buf111[MAX_SIZE];
    guchar buf222[MAX_SIZE];
    GTimeVal tstart;
    guint i, j;
    guint testTimes = 100000;

    // 初始化数据
    for(i = 0; i < MAX_SIZE; i++)
    {
        buf111[i] = 1;
        buf222[i] = 2;
    }

    // 开始测试：1字节复制
    g_get_current_time(&tstart);
    for(j = 0; j < testTimes; j++)
        for(i = 0; i < MAX_SIZE; i++)
            buf111[i] = buf222[i];
    Comput_Print_Result("1byte copy    ", testTimes, tstart);

    // 更多测试代码...

    // 结束测试：内存复制验证
    for(i = 0; i < MAX_SIZE; i++)
        if(buf111[i] != buf222[i])
            g_print("mem copy failed\n");

    // 随机数生成测试代码...
    
    return 0;
}

void Comput_Print_Result(gchar *str, guint loops, GTimeVal tStart)
{
    GTimeVal tEnd;
    g_get_current_time(&tEnd);
    gfloat time_msec = (1000000.00 * (tEnd.tv_sec - tStart.tv_sec) + tEnd.tv_usec - tStart.tv_usec) / 1000;
    gfloat time_each = time_msec / loops * 1000000;
    g_print("Time %s: %.2fms used for %d loops. Each loop %.2fns\n", str, time_msec, loops, time_each);
}

CC=gcc
PROG_NAME=PerformanceTest
INCS=
SRCS=PerformanceTest.c
OBJS=${SRCS:.c=.o}
LIBS=gtk+-2.0

CFLAGS=`pkg-config --cflags ${LIBS}` -g -Wall
LDFLAGS=`pkg-config --libs ${LIBS}` -g -Wall

all: ${PROG_NAME}

${PROG_NAME}:${OBJS}
    ${CC} -o ${PROG_NAME} ${OBJS} ${LDFLAGS}

${OBJS}:${INCS}

.c.o:
    ${CC} -c $< ${CFLAGS}

clean:
    rm -f *.o ${PROG_NAME}

rebuild: clean all