1c97099b0SAndrii Nakryiko // SPDX-License-Identifier: GPL-2.0 2c97099b0SAndrii Nakryiko // Copyright (c) 2020 Facebook 3c97099b0SAndrii Nakryiko 4c97099b0SAndrii Nakryiko #include <linux/bpf.h> 5c97099b0SAndrii Nakryiko #include <stdint.h> 6c97099b0SAndrii Nakryiko #include <bpf/bpf_helpers.h> 7*e91d280cSNaveen N. Rao #include "bpf_misc.h" 8c97099b0SAndrii Nakryiko 9c97099b0SAndrii Nakryiko char _license[] SEC("license") = "GPL"; 10c97099b0SAndrii Nakryiko 11c97099b0SAndrii Nakryiko struct { 12c97099b0SAndrii Nakryiko __uint(type, BPF_MAP_TYPE_PERF_EVENT_ARRAY); 13c97099b0SAndrii Nakryiko __uint(value_size, sizeof(int)); 14c97099b0SAndrii Nakryiko __uint(key_size, sizeof(int)); 15c97099b0SAndrii Nakryiko } perfbuf SEC(".maps"); 16c97099b0SAndrii Nakryiko 17c97099b0SAndrii Nakryiko const volatile int batch_cnt = 0; 18c97099b0SAndrii Nakryiko 19c97099b0SAndrii Nakryiko long sample_val = 42; 20c97099b0SAndrii Nakryiko long dropped __attribute__((aligned(128))) = 0; 21c97099b0SAndrii Nakryiko 22*e91d280cSNaveen N. Rao SEC("fentry/" SYS_PREFIX "sys_getpgid") bench_perfbuf(void * ctx)23c97099b0SAndrii Nakryikoint bench_perfbuf(void *ctx) 24c97099b0SAndrii Nakryiko { 25c97099b0SAndrii Nakryiko int i; 26c97099b0SAndrii Nakryiko 27c97099b0SAndrii Nakryiko for (i = 0; i < batch_cnt; i++) { 28c97099b0SAndrii Nakryiko if (bpf_perf_event_output(ctx, &perfbuf, BPF_F_CURRENT_CPU, 29c97099b0SAndrii Nakryiko &sample_val, sizeof(sample_val))) 30c97099b0SAndrii Nakryiko __sync_add_and_fetch(&dropped, 1); 31c97099b0SAndrii Nakryiko } 32c97099b0SAndrii Nakryiko return 0; 33c97099b0SAndrii Nakryiko } 34