[PATCH net-next 0/3] bpf_perf_event_output helper
From: Alexei Starovoitov
Date: Tue Oct 20 2015 - 23:02:49 EST
Over the last year there were multiple attempts to let eBPF programs
output data into perf events by He Kuang and Wangnan.
The last one was:
https://lkml.org/lkml/2015/7/20/736
It was almost perfect with exception that all bpf programs would sent
data into one global perf_event.
This patch set takes different approach by letting user space
open independent PERF_COUNT_SW_BPF_OUTPUT events, so that program
output won't collide.
Wangnan is working on corresponding perf patches.
Alexei Starovoitov (3):
perf: pad raw data samples automatically
bpf: introduce bpf_perf_event_output() helper
samples: bpf: add bpf_perf_event_output example
include/uapi/linux/bpf.h | 11 +++
include/uapi/linux/perf_event.h | 1 +
kernel/bpf/arraymap.c | 2 +
kernel/bpf/verifier.c | 3 +-
kernel/events/core.c | 15 ++-
kernel/trace/bpf_trace.c | 46 +++++++++
samples/bpf/Makefile | 7 ++
samples/bpf/bpf_helpers.h | 2 +
samples/bpf/trace_output_kern.c | 31 +++++++
samples/bpf/trace_output_user.c | 196 +++++++++++++++++++++++++++++++++++++++
10 files changed, 308 insertions(+), 6 deletions(-)
create mode 100644 samples/bpf/trace_output_kern.c
create mode 100644 samples/bpf/trace_output_user.c
--
1.7.9.5
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