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authorAlexei Starovoitov <ast@plumgrid.com>2015-10-20 20:02:35 -0700
committerDavid S. Miller <davem@davemloft.net>2015-10-22 06:42:15 -0700
commit39111695b1b88a21e81983a38786d877e770da81 (patch)
tree33c57207f5ed18a5408ed9c25ec0ab169ec0fb5d /samples/bpf/bpf_helpers.h
parenta43eec304259a6c637f4014a6d4767159b6a3aa3 (diff)
downloadblackbird-op-linux-39111695b1b88a21e81983a38786d877e770da81.tar.gz
blackbird-op-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.h2
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
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