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| author | Alexei Starovoitov <ast@plumgrid.com> | 2015-10-21 05:02:35 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-10-22 15:42:15 +0200 |
| commit | 39111695b1b88a21e81983a38786d877e770da81 (patch) | |
| tree | 33c57207f5ed18a5408ed9c25ec0ab169ec0fb5d /samples/bpf/bpf_helpers.h | |
| parent | bpf: introduce bpf_perf_event_output() helper (diff) | |
| download | linux-39111695b1b88a21e81983a38786d877e770da81.tar.xz linux-39111695b1b88a21e81983a38786d877e770da81.zip | |
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 <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'samples/bpf/bpf_helpers.h')
| -rw-r--r-- | samples/bpf/bpf_helpers.h | 2 |
1 files changed, 2 insertions, 0 deletions
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 |