--- /dev/null
+#include <linux/version.h>
+#include <uapi/linux/bpf.h>
+#include "bpf_helpers.h"
+
+struct bpf_map_def SEC("maps") my_map = {
+ .type = BPF_MAP_TYPE_PERF_EVENT_ARRAY,
+ .key_size = sizeof(int),
+ .value_size = sizeof(u32),
+ .max_entries = 32,
+};
+
+SEC("kprobe/sys_write")
+int bpf_prog1(struct pt_regs *ctx)
+{
+ u64 count;
+ u32 key = bpf_get_smp_processor_id();
+ char fmt[] = "CPU-%d %llu\n";
+
+ count = bpf_perf_event_read(&my_map, key);
+ bpf_trace_printk(fmt, sizeof(fmt), key, count);
+
+ return 0;
+}
+
+char _license[] SEC("license") = "GPL";
+u32 _version SEC("version") = LINUX_VERSION_CODE;