diff --git a/.github/workflows/libbpf.yml b/.github/workflows/libbpf.yml
index 1cda698ae..c5cf8003a 100644
--- a/.github/workflows/libbpf.yml
+++ b/.github/workflows/libbpf.yml
@@ -24,8 +24,8 @@ jobs:
         run: |
           sudo apt install clang libelf1 libelf-dev zlib1g-dev
           sudo apt install libbpf-dev
-          sudo apt install linux-tools-5.15.0-53-generic	
-          sudo apt install linux-cloud-tools-5.15.0-53-generic
+          sudo apt install -y linux-tools-5.15.0-53-generic	
+          sudo apt install -y linux-cloud-tools-5.15.0-53-generic
 
       - name: Run cs_delay
         run: |
diff --git a/eBPF_Supermarket/CPU_Subsystem/cs_delay/BCC_cs_delay/cs_delay.c b/eBPF_Supermarket/CPU_Subsystem/cs_delay/BCC_cs_delay/cs_delay.c
index 68b656b1b..2ea38ca05 100644
--- a/eBPF_Supermarket/CPU_Subsystem/cs_delay/BCC_cs_delay/cs_delay.c
+++ b/eBPF_Supermarket/CPU_Subsystem/cs_delay/BCC_cs_delay/cs_delay.c
@@ -3,9 +3,9 @@
 BPF_ARRAY(start, u64,1);
 BPF_HISTOGRAM(dist);
 
-int do_entry(struct pt_regs *ctx)	//pt_regs½á¹¹¶¨ÒåÁËÔÚϵͳµ÷ÓûòÆäËûÄÚºËÌõÄ¿Æڼ佫¼Ä´æÆ÷´æ´¢ÔÚÄں˶ÑÕ»Éϵķ½Ê½
+int do_entry(struct pt_regs *ctx)	//pt_regs�ṹ��������ϵͳ���û������ں���Ŀ�ڼ佫�Ĵ����洢���ں˶�ջ�ϵķ�ʽ
 {
-	u64 t1= bpf_ktime_get_ns()/1000;	//bpf_ktime_get_ns·µ»Ø×ÔϵͳÆô¶¯ÒÔÀ´Ëù¾­¹ýµÄʱ¼ä(ÒÔÄÉÃëΪµ¥Î»)¡£²»°üÀ¨ÏµÍ³¹ÒÆðµÄʱ¼ä
+	u64 t1= bpf_ktime_get_ns()/1000;	//bpf_ktime_get_ns������ϵͳ����������������ʱ��(������Ϊ��λ)��������ϵͳ�����ʱ��
 	int key=0;
 	start.update(&key,&t1);
 	
@@ -28,4 +28,4 @@ int do_return(struct pt_regs *ctx)
 	}
 	
 	return 0;
-}
+}
\ No newline at end of file
diff --git a/eBPF_Supermarket/CPU_Subsystem/libbpf b/eBPF_Supermarket/CPU_Subsystem/libbpf
index 432a43485..966afdddf 160000
--- a/eBPF_Supermarket/CPU_Subsystem/libbpf
+++ b/eBPF_Supermarket/CPU_Subsystem/libbpf
@@ -1 +1 @@
-Subproject commit 432a4348579e0049af45c6712a2c1430f607b086
+Subproject commit 966afdddf6a6c46e55abdcaeed6d1e1fb0a6ba3a