diff --git a/tests/cpu/index.md b/tests/cpu/index.md
index 79c5918..d7a1699 100644
--- a/tests/cpu/index.md
+++ b/tests/cpu/index.md
@@ -1,3 +1,4 @@
 - [likely 和 unlikely 汇编结果对比](tests/cpu/test01)
 - [物理机 cpu 系统利用率的计算过程](tests/cpu/test06)
-- [容器 cpu 系统利用率的计算过程](tests/cpu/test07)
\ No newline at end of file
+- [容器 cpu 系统利用率的计算过程](tests/cpu/test07)
+- [直接使用perf_event_open获取硬件计数](tests/cpu/test08)
\ No newline at end of file
diff --git a/tests/cpu/test08/main.c b/tests/cpu/test08/main.c
new file mode 100644
index 0000000..8e57e94
--- /dev/null
+++ b/tests/cpu/test08/main.c
@@ -0,0 +1,43 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <sys/syscall.h>
+#include <linux/perf_event.h>
+ 
+// 封装perf_event_open系统调用
+int perf_event_open(struct perf_event_attr *attr,pid_t pid,int  ,int group_fd,unsigned long flags)
+{
+    return syscall(__NR_perf_event_open,attr,pid,cpu,group_fd,flags);
+}
+ 
+int main()
+{
+    // 第一步：创建perf文件描述符
+    // 准备参数
+    struct perf_event_attr attr;
+    memset(&attr,0,sizeof(struct perf_event_attr));
+    attr.size=sizeof(struct perf_event_attr);
+    attr.type=PERF_TYPE_HARDWARE; // 监测硬件
+    attr.config=PERF_COUNT_HW_INSTRUCTIONS; // 监测指令数
+    
+    // pid=0表示只检测当前进程
+    // cpu=-1表示检测所有cpu核
+    int fd=perf_event_open(&attr,0,-1,-1,0);
+    if(fd<0)
+    {
+        perror("Cannot open perf fd!");
+        return 1;
+    }
+
+    // 第二步：定时获取指标计数
+    // 每隔1秒打印一次当前计数
+    while(1)
+    {
+        uint64_t instructions;
+        read(fd,&instructions,sizeof(instructions));
+        printf("instructions=%ld\n",instructions);
+        sleep(1);
+    }
+}
+