diff --git a/observation/src/biotop/biotop.bpf.c b/observation/src/biotop/biotop.bpf.c
new file mode 100644
index 0000000000000000000000000000000000000000..8d79e3d94732f2c022c4df49fcc991c63c9b88a5
--- /dev/null
+++ b/observation/src/biotop/biotop.bpf.c
@@ -0,0 +1,33 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "vmlinux.h"
+#include <bpf/bpf_helpers.h>
+#include <bpf/bpf_core_read.h>
+#include <bpf/bpf_tracing.h>
+#include "biotop.h"
+#include "maps.bpf.h"
+#include "core_fixes.bpf.h"
+
+#define MAX_ENTRIES	10240
+
+struct {
+	__uint(type, BPF_MAP_TYPE_HASH);
+	__uint(max_entries, MAX_ENTRIES);
+	__type(key, struct request *);
+	__type(value, struct start_req_t);
+} start SEC(".maps");
+
+struct {
+	__uint(type, BPF_MAP_TYPE_HASH);
+	__uint(max_entries, MAX_ENTRIES);
+	__type(key, struct request *);
+	__type(value, struct who_t);
+} whobyreq SEC(".maps");
+
+struct {
+	__uint(type, BPF_MAP_TYPE_HASH);
+	__uint(max_entries, MAX_ENTRIES);
+	__type(key, struct info_t);
+	__type(value, struct val_t);
+} counts SEC(".maps");
+
+char LICENSE[] SEC("license") = "GPL";