diff --git a/src/12-profile/profile.bpf.c b/src/12-profile/profile.bpf.c
index 614b274..b9d142a 100644
--- a/src/12-profile/profile.bpf.c
+++ b/src/12-profile/profile.bpf.c
@@ -14,6 +14,8 @@ struct {
 	__uint(max_entries, 256 * 1024);
 } events SEC(".maps");
 
+__u32 target_pid = 0;
+
 SEC("perf_event")
 int profile(void *ctx)
 {
@@ -22,6 +24,10 @@ int profile(void *ctx)
 	struct stacktrace_event *event;
 	int cp;
 
+	/* Check if we need to filter by PID */
+	if (target_pid != 0 && target_pid != pid)
+		return 0;
+
 	event = bpf_ringbuf_reserve(&events, sizeof(*event), 0);
 	if (!event)
 		return 1;
@@ -33,7 +39,6 @@ int profile(void *ctx)
 		event->comm[0] = 0;
 
 	event->kstack_sz = bpf_get_stack(ctx, event->kstack, sizeof(event->kstack), 0);
-
 	event->ustack_sz = bpf_get_stack(ctx, event->ustack, sizeof(event->ustack), BPF_F_USER_STACK);
 
 	bpf_ringbuf_submit(event, 0);
diff --git a/src/12-profile/profile.c b/src/12-profile/profile.c
index dc65a32..82d8725 100644
--- a/src/12-profile/profile.c
+++ b/src/12-profile/profile.c
@@ -118,7 +118,10 @@ static int event_handler(void *_ctx, void *data, size_t size)
 
 static void show_help(const char *progname)
 {
-	printf("Usage: %s [-f <frequency>] [-h]\n", progname);
+	printf("Usage: %s [-f <frequency>] [-p <pid>] [-h]\n", progname);
+	printf("  -f <frequency>  sampling frequency (default: 1)\n");
+	printf("  -p <pid>        target PID to profile (default: all processes)\n");
+	printf("  -h              show this help\n");
 }
 
 int main(int argc, char * const argv[])
@@ -133,8 +136,10 @@ int main(int argc, char * const argv[])
 	int *pefds = NULL, pefd;
 	int argp, i, err = 0;
 	bool *online_mask = NULL;
+	__u32 target_pid = 0; /* 0 means profile all processes */
+	__u32 key = 0;
 
-	while ((argp = getopt(argc, argv, "hf:")) != -1) {
+	while ((argp = getopt(argc, argv, "hf:p:")) != -1) {
 		switch (argp) {
 		case 'f':
 			freq = atoi(optarg);
@@ -142,6 +147,10 @@ int main(int argc, char * const argv[])
 				freq = 1;
 			break;
 
+		case 'p':
+			target_pid = atoi(optarg);
+			break;
+
 		case 'h':
 		default:
 			show_help(argv[0]);
@@ -169,6 +178,14 @@ int main(int argc, char * const argv[])
 		goto cleanup;
 	}
 
+	/* Set the target PID in the BPF map */
+	if (target_pid) {
+		skel->bss->target_pid = target_pid;
+		printf("Profiling process with PID %u only\n", target_pid);
+	} else {
+		printf("Profiling all processes\n");
+	}
+
 	symbolizer = blazesym_new();
 	if (!symbolizer) {
 		fprintf(stderr, "Fail to create a symbolizer\n");