Re: [PATCH 32/32] bpf: Introduce function for outputing data to perf event

[Alexei Starovoitov]

On 8/28/15 6:19 PM, Wangnan (F) wrote:
> For me, I use bpf_output_trace_data() to output information like PMU count
> value. Perf is the only receiver, so global collector is perfect. Could you
> please describe your usecase in more detail?

there is a special receiver in user space that only wants the data from
the bpf program that it loaded. It shouldn't conflict with any other
processes. Like when it's running, I still should be able to use perf
for other performance analysis. There is no way to share single
bpf:bpf_output_data event, since these user processes are completely
independent.

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