Re: [RFC PATCH 00/22] perf tools: introduce 'perf bpf' command to load eBPF programs.

Arnaldo Carvalho de Melo
2015-05-05T16:10:49Z

Em Fri, May 01, 2015 at 09:56:23AM -0700, Alexei Starovoitov escreveu:
> Anyway, back to my original question about long term home.
> where to land 'perf/bpf' branch ?

I don't care, but for me to merge it, please go on addressing the
comments made in this thread (perf bpf command --args, etc) and at some
point provide a small patchset that implements the most basic stuff,
like, say, a "hello, world" style proggie, together with the
tools/perf/Documentation/perf-bpf.txt file, detailed instructions on how
to use the feature, i.e. what dependencies are needed, what kernel
options should be enabled, etc.

Nice warning/error messages for when the user doesn't have those options
enabled or doesn't have appropriate permissions, etc.

I.e. just by following what is in each changeset comment log I should be
able to test patch after patch.

After we get one such, say, 10-long patchkit with a very basic feature
of eBPF exposed via 'perf bpf', we can go to the next, and so on.

Try to use 'perf trace usleep 1', 'perf trace -a usleep 1' as non-root,
for instance, to see examples on how to inform the user about what is
needed to use the tool.

- Arnaldo