selftests/bpf: add pyperf scale test

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Add a snippet of pyperf bpf program used to collect python stack traces
as a scale test for the verifier.

At 189 loop iterations llvm 9.0 starts ignoring '#pragma unroll'
and generates partially unrolled loop instead.
Hence use 50, 100, and 180 loop iterations to stress test.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

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Alexei Starovoitov 2019-05-21 20:14:21 -07:00 • committed by Daniel Borkmann

parent 7c0c6095d4

commit 7c9441066a

5 changed files with 298 additions and 13 deletions

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31

tools/testing/selftests/bpf/prog_tests/bpf_verif_scale.c

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268

tools/testing/selftests/bpf/progs/pyperf.h

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tools/testing/selftests/bpf/progs/pyperf100.c

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tools/testing/selftests/bpf/progs/pyperf180.c

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tools/testing/selftests/bpf/progs/pyperf50.c

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