From 39111695b1b88a21e81983a38786d877e770da81 Mon Sep 17 00:00:00 2001 From: Alexei Starovoitov Date: Tue, 20 Oct 2015 20:02:35 -0700 Subject: samples: bpf: add bpf_perf_event_output example Performance test and example of bpf_perf_event_output(). kprobe is attached to sys_write() and trivial bpf program streams pid+cookie into userspace via PERF_COUNT_SW_BPF_OUTPUT event. Usage: $ sudo ./bld_x64/samples/bpf/trace_output recv 2968913 events per sec Signed-off-by: Alexei Starovoitov Signed-off-by: David S. Miller --- samples/bpf/bpf_helpers.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'samples/bpf/bpf_helpers.h') diff --git a/samples/bpf/bpf_helpers.h b/samples/bpf/bpf_helpers.h index 21aa1b44c30c..b35c21e0b43f 100644 --- a/samples/bpf/bpf_helpers.h +++ b/samples/bpf/bpf_helpers.h @@ -37,6 +37,8 @@ static int (*bpf_clone_redirect)(void *ctx, int ifindex, int flags) = (void *) BPF_FUNC_clone_redirect; static int (*bpf_redirect)(int ifindex, int flags) = (void *) BPF_FUNC_redirect; +static int (*bpf_perf_event_output)(void *ctx, void *map, int index, void *data, int size) = + (void *) BPF_FUNC_perf_event_output; /* llvm builtin functions that eBPF C program may use to * emit BPF_LD_ABS and BPF_LD_IND instructions -- cgit v1.2.1