selftests/bpf: Relax time_tai test for equal timestamps in tai_forward

[ Upstream commit e1ba7f64b192f083b4423644be03bb9e3dc8ae84 ]

We're observing test flakiness on an arm64 platform which might not
have timestamps as precise as x86. The test log looks like:

  test_time_tai:PASS:tai_open 0 nsec
  test_time_tai:PASS:test_run 0 nsec
  test_time_tai:PASS:tai_ts1 0 nsec
  test_time_tai:PASS:tai_ts2 0 nsec
  test_time_tai:FAIL:tai_forward unexpected tai_forward: actual 1702348135471494160 <= expected 1702348135471494160
  test_time_tai:PASS:tai_gettime 0 nsec
  test_time_tai:PASS:tai_future_ts1 0 nsec
  test_time_tai:PASS:tai_future_ts2 0 nsec
  test_time_tai:PASS:tai_range_ts1 0 nsec
  test_time_tai:PASS:tai_range_ts2 0 nsec
  #199     time_tai:FAIL

This patch changes ASSERT_GT to ASSERT_GE in the tai_forward assertion
so that equal timestamps are permitted.

Fixes: 64e15820b987 ("selftests/bpf: Add BPF-helper test for CLOCK_TAI access")
Signed-off-by: YiFei Zhu <zhuyifei@google.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20231212182911.3784108-1-zhuyifei@google.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/tools/testing/selftests/bpf/prog_tests/time_tai.c b/tools/testing/selftests/bpf/prog_tests/time_tai.c
index a311198..f45af1b 100644 (file)
--- a/tools/testing/selftests/bpf/prog_tests/time_tai.c
+++ b/tools/testing/selftests/bpf/prog_tests/time_tai.c
@@ -56,7 +56,7 @@ void test_time_tai(void)
        ASSERT_NEQ(ts2, 0, "tai_ts2");
 
        /* TAI is moving forward only */
-       ASSERT_GT(ts2, ts1, "tai_forward");
+       ASSERT_GE(ts2, ts1, "tai_forward");
 
        /* Check for future */
        ret = clock_gettime(CLOCK_TAI, &now_tai);