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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>
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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6
tools/testing/selftests/bpf/test_progs.c
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@@ -9,6 +9,7 @@
int error_cnt, pass_cnt;
bool jit_enabled;
bool verifier_stats = false;
struct ipv4_packet pkt_v4 = {
.eth.h_proto = __bpf_constant_htons(ETH_P_IP),
@@ -162,12 +163,15 @@ void *spin_lock_thread(void *arg)
#include <prog_tests/tests.h>
#undef DECLARE
int main(void)
int main(int ac, char **av)
{
srand(time(NULL));
jit_enabled = is_jit_enabled();
if (ac == 2 && strcmp(av[1], "-s") == 0)
verifier_stats = true;
#define CALL
#include <prog_tests/tests.h>
#undef CALL