selftests/bpf: add few verifier scale tests

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Add 3 basic tests that stress verifier scalability.

test_verif_scale1.c calls non-inlined jhash() function 90 times on
different position in the packet.
This test simulates network packet parsing.
jhash function is ~140 instructions and main program is ~1200 insns.

test_verif_scale2.c force inlines jhash() function 90 times.
This program is ~15k instructions long.

test_verif_scale3.c calls non-inlined jhash() function 90 times on
But this time jhash has to process 32-bytes from the packet
instead of 14-bytes in tests 1 and 2.
jhash function is ~230 insns and main program is ~1200 insns.

$ test_progs -s
can be used to see verifier stats.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

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This commit is contained in:

Alexei Starovoitov 2019-04-01 21:27:48 -07:00 • committed by Daniel Borkmann

parent da11b41758

commit e5e7a8f2d8

7 changed files with 215 additions and 1 deletions

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49

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

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

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tools/testing/selftests/bpf/progs/test_verif_scale1.c

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tools/testing/selftests/bpf/progs/test_verif_scale2.c

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tools/testing/selftests/bpf/progs/test_verif_scale3.c

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tools/testing/selftests/bpf/test_progs.c

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tools/testing/selftests/bpf/test_progs.h

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