diff options
author | Yucong Sun <fallentree@fb.com> | 2021-08-17 07:57:13 +0300 |
---|---|---|
committer | Andrii Nakryiko <andrii@kernel.org> | 2021-08-17 18:17:40 +0300 |
commit | 857f75ea845706a0ec65ce2239da519214a4451a (patch) | |
tree | f4804f3ab8c1872f8ac67950fd4e49b5332e5fbb /tools/testing/selftests/bpf/test_maps.c | |
parent | 3c3bd542ffbb2ac09631313ede46ae66660ae550 (diff) | |
download | linux-857f75ea845706a0ec65ce2239da519214a4451a.tar.xz |
selftests/bpf: Add exponential backoff to map_delete_retriable in test_maps
Using a fixed delay of 1 microsecond has proven flaky in slow CPU environment,
e.g. Github Actions CI system. This patch adds exponential backoff with a cap
of 50ms to reduce the flakiness of the test. Initial delay is chosen at random
in the range [0ms, 5ms).
Signed-off-by: Yucong Sun <fallentree@fb.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20210817045713.3307985-1-fallentree@fb.com
Diffstat (limited to 'tools/testing/selftests/bpf/test_maps.c')
-rw-r--r-- | tools/testing/selftests/bpf/test_maps.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/tools/testing/selftests/bpf/test_maps.c b/tools/testing/selftests/bpf/test_maps.c index 2caf58b40d40..340695d5d652 100644 --- a/tools/testing/selftests/bpf/test_maps.c +++ b/tools/testing/selftests/bpf/test_maps.c @@ -1420,11 +1420,16 @@ static int map_update_retriable(int map_fd, const void *key, const void *value, static int map_delete_retriable(int map_fd, const void *key, int attempts) { + int delay = rand() % MIN_DELAY_RANGE_US; + while (bpf_map_delete_elem(map_fd, key)) { if (!attempts || (errno != EAGAIN && errno != EBUSY)) return -errno; - usleep(1); + if (delay <= MAX_DELAY_US / 2) + delay *= 2; + + usleep(delay); attempts--; } |