selftests/bpf: Add ring_buffer__consume_n test.

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Add a testcase for the ring_buffer__consume_n() API.

The test produces multiple samples in a ring buffer, using a
sys_getpid() fentry prog, and consumes them from user-space in batches,
rather than consuming all of them greedily, like ring_buffer__consume()
does.

Signed-off-by: Andrea Righi <andrea.righi@canonical.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: https://lore.kernel.org/lkml/CAEf4BzaR4zqUpDmj44KNLdpJ=Tpa97GrvzuzVNO5nM6b7oWd1w@mail.gmail.com
Link: https://lore.kernel.org/bpf/20240425140627.112728-1-andrea.righi@canonical.com

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Andrea Righi 2024-04-25 16:06:27 +02:00 • committed by Andrii Nakryiko

parent 8ec3bf5c31

commit 638a485c49

3 changed files with 113 additions and 1 deletions

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2

tools/testing/selftests/bpf/Makefile

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65

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

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47

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

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