Merge branch 'runqslower'

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Andrii Nakryiko says:

====================
Based on recent BPF CO-RE, tp_btf, and BPF skeleton changes, re-implement
BCC-based runqslower tool as a portable pre-compiled BPF CO-RE-based tool.
Make sure it's built as part of selftests to ensure it doesn't bit rot.

As part of this patch set, augment `format c` output of `bpftool btf dump`
sub-command with applying `preserve_access_index` attribute to all structs and
unions. This makes all such structs and unions automatically relocatable under
BPF CO-RE, which improves user experience of writing TRACING programs with
direct kernel memory read access.

Also, further clean up selftest/bpf Makefile output and make it conforming to
libbpf and bpftool succinct output format.

v1->v2:
- build in-tree bpftool for runqslower (Yonghong);
- drop `format core` and augment `format c` instead (Alexei);
- move runqslower under tools/bpf (Daniel).
====================

Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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This commit is contained in:

Alexei Starovoitov 2020-01-13 17:48:13 -08:00

parent ac065870d9 3a0d3092a4

commit 6dd42aa17f

11 changed files with 437 additions and 31 deletions

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scripts/bpf_helpers_doc.py

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tools/bpf/Makefile

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tools/bpf/bpftool/btf.c

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tools/bpf/runqslower/.gitignore vendored

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tools/bpf/runqslower/Makefile

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tools/bpf/runqslower/runqslower.bpf.c

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tools/bpf/runqslower/runqslower.c

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tools/bpf/runqslower/runqslower.h

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tools/include/uapi/linux/if_link.h

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tools/lib/bpf/Makefile

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tools/testing/selftests/bpf/Makefile

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