Messages in this thread | | | From | Wang Nan <> | Subject | [PATCH 0/4] perf bpf: Add __bpf_stdout__ support | Date | Fri, 8 Apr 2016 15:07:21 +0000 |
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Hi Arnaldo,
Following your suggestion, patch 3-4 in this patch set add __bpf_stdout__ support. If a map is called __bpf_stdout__, perf will create a bpf-output event and attach to it automatically. Don't need to setup bpf output event in cmdline explicitly.
# perf record -e ./test_bpf_trace.c usleep 100000 # ~/perf script usleep 25656 [003] 264724.900051: 0 __bpf_stdout__: ffffffff810eb9a1 sys_nanosleep (/lib/modules BPF output: 0000: 52 61 69 73 65 20 61 20 Raise a 0008: 42 50 46 20 65 76 65 6e BPF even 0010: 74 21 00 00 t!.. BPF string: "Raise a BPF event!"
usleep 25656 [003] 264725.000112: 0 __bpf_stdout__: ffffffff8105d609 kretprobe_trampoline_holder BPF output: 0000: 52 61 69 73 65 20 61 20 Raise a 0008: 42 50 46 20 65 76 65 6e BPF even 0010: 74 21 00 00 t!.. BPF string: "Raise a BPF event!"
Wang Nan (4): perf trace: Improve error message when receive non-tracepoint events perf trace: Print content of bpf-output event perf bpf: Clone bpf stdout events in multiple bpf scripts perf bpf: Automatically create bpf-output event __bpf_stdout__
tools/perf/builtin-record.c | 8 +++ tools/perf/builtin-trace.c | 33 +++++++++- tools/perf/util/bpf-loader.c | 143 +++++++++++++++++++++++++++++++++++++++++++ tools/perf/util/bpf-loader.h | 19 ++++++ 4 files changed, 202 insertions(+), 1 deletion(-)
-- 1.8.3.4
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