Refactor test output in arena_list.c to remove redundant print statements

- Removed unnecessary print statements for arena sum and number of elements in the test_arena_list_add_del function.
- Simplified output to focus on essential test results, improving clarity and conciseness of the test logs.

Author: yunwei37

src/46-xdp-test/README.md

@@ -178,7 +178,7 @@ This attempts a single packet injection. If the kernel lacks support (Linux <5.1
 Navigate to the tutorial directory and build the project:
 
 ```bash
-cd /home/yunwei37/workspace/bpf-developer-tutorial/src/46-xdp-test
+cd bpf-developer-tutorial/src/46-xdp-test
 make build
 ```
 

src/46-xdp-test/README.zh.md

@@ -178,7 +178,7 @@ static int probe_kernel_support(int run_prog_fd)
 导航到教程目录并构建项目：
 
 ```bash
-cd /home/yunwei37/workspace/bpf-developer-tutorial/src/46-xdp-test
+cd bpf-developer-tutorial/src/46-xdp-test
 make build
 ```
 

src/features/bpf_arena/README.md

@@ -241,8 +241,6 @@ static void test_arena_list_add_del(int cnt)
 	}
 	sum = list_sum(skel->bss->list_head);
 	printf("Sum of elements: %d (expected: %d)\n", sum, expected_sum);
-	printf("Arena sum: %ld (expected: %d)\n", skel->bss->arena_sum, expected_sum);
-	printf("Number of elements: %d (expected: %d)\n", skel->data->test_val, cnt + 1);
 
 	ret = bpf_prog_test_run_opts(bpf_program__fd(skel->progs.arena_list_del), &opts);
 	if (ret != 0) {
@@ -252,7 +250,6 @@ static void test_arena_list_add_del(int cnt)
 	sum = list_sum(skel->bss->list_head);
 	printf("Sum after deletion: %d (expected: 0)\n", sum);
 	printf("Sum computed by BPF: %d (expected: %d)\n", skel->bss->list_sum, expected_sum);
-	printf("Arena sum after deletion: %ld (expected: %d)\n", skel->bss->arena_sum, expected_sum);
 
 	printf("\nTest passed!\n");
 out:
@@ -303,7 +300,7 @@ This allocator design avoids locks by using per-CPU state. Since BPF programs ru
 Navigate to the bpf_arena directory and build the example:
 
 ```bash
-cd /home/yunwei37/workspace/bpf-developer-tutorial/src/features/bpf_arena
+cd bpf-developer-tutorial/src/features/bpf_arena
 make
 ```
 
@@ -320,11 +317,8 @@ Expected output:
 ```
 Testing arena list with 10 elements
 Sum of elements: 45 (expected: 45)
-Arena sum: 45 (expected: 45)
-Number of elements: 11 (expected: 11)
 Sum after deletion: 0 (expected: 0)
 Sum computed by BPF: 45 (expected: 45)
-Arena sum after deletion: 45 (expected: 45)
 
 Test passed!
 ```

src/features/bpf_arena/README.zh.md

@@ -55,8 +55,6 @@ static void test_arena_list_add_del(int cnt)
 	}
 	sum = list_sum(skel->bss->list_head);
 	printf("Sum of elements: %d (expected: %d)\n", sum, expected_sum);
-	printf("Arena sum: %ld (expected: %d)\n", skel->bss->arena_sum, expected_sum);
-	printf("Number of elements: %d (expected: %d)\n", skel->data->test_val, cnt + 1);
 
 	ret = bpf_prog_test_run_opts(bpf_program__fd(skel->progs.arena_list_del), &opts);
 	if (ret != 0) {
@@ -66,7 +64,6 @@ static void test_arena_list_add_del(int cnt)
 	sum = list_sum(skel->bss->list_head);
 	printf("Sum after deletion: %d (expected: 0)\n", sum);
 	printf("Sum computed by BPF: %d (expected: %d)\n", skel->bss->list_sum, expected_sum);
-	printf("Arena sum after deletion: %ld (expected: %d)\n", skel->bss->arena_sum, expected_sum);
 
 	printf("\nTest passed!\n");
 out:

src/features/bpf_arena/arena_list.c

@@ -1,4 +1,4 @@
-# eBPF Tutorial by Example: BPF Iterators for Kernel Data Export
+# eBPF Tutorial: BPF Iterators for Kernel Data Export
 
 Ever tried monitoring hundreds of processes and ended up parsing thousands of `/proc` files just to find the few you care about? Or needed custom formatted kernel data but didn't want to modify the kernel itself? Traditional `/proc` filesystem access is slow, inflexible, and forces you to process tons of data in userspace even when you only need a small filtered subset.
 
@@ -294,7 +294,7 @@ After loading, we select which iterator to run based on the `--files` flag. Both
 Navigate to the bpf_iters directory and build:
 
 ```bash
-cd /home/yunwei37/workspace/bpf-developer-tutorial/src/features/bpf_iters
+cd bpf-developer-tutorial/src/features/bpf_iters
 make
 ```