Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 34 insertions, 0 deletions

diff --git a/tools/testing/selftests/bpf/progs/perfbuf_bench.c b/tools/testing/selftests/bpf/progs/perfbuf_bench.c
new file mode 100644
index 000000000..45204fe0c
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/perfbuf_bench.c
@@ -0,0 +1,34 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2020 Facebook
+
+#include <linux/bpf.h>
+#include <stdint.h>
+#include <bpf/bpf_helpers.h>
+#include "bpf_misc.h"
+
+char _license[] SEC("license") = "GPL";
+
+struct {
+	__uint(type, BPF_MAP_TYPE_PERF_EVENT_ARRAY);
+	__uint(value_size, sizeof(int));
+	__uint(key_size, sizeof(int));
+} perfbuf SEC(".maps");
+
+const volatile int batch_cnt = 0;
+
+long sample_val = 42;
+long dropped __attribute__((aligned(128))) = 0;
+
+SEC("fentry/" SYS_PREFIX "sys_getpgid")
+int bench_perfbuf(void *ctx)
+{
+	__u64 *sample;
+	int i;
+
+	for (i = 0; i < batch_cnt; i++) {
+		if (bpf_perf_event_output(ctx, &perfbuf, BPF_F_CURRENT_CPU,
+					  &sample_val, sizeof(sample_val)))
+			__sync_add_and_fetch(&dropped, 1);
+	}
+	return 0;
+}