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| author | Jim Meyering <meyering@redhat.com> | 2009-09-07 11:39:19 +0200 |
|---|---|---|
| committer | Jim Meyering <meyering@redhat.com> | 2009-09-07 13:55:37 +0200 |
| commit | 494fed027114d63719439b399a7602f8d0384bcf (patch) | |
| tree | a5ff155966d515b46dbd9cead6ce4f35ba994eb6 /tests/tail-2 | |
| parent | 61cc6fbc279af8044651348a00ea47c9412f03cb (diff) | |
| download | coreutils-494fed027114d63719439b399a7602f8d0384bcf.tar.xz | |
tests: tail-2/infloop-1: avoid rare test failure on a busy system
* tests/tail-2/infloop-1: Sleep 3 seconds, not 1, but in increments
of 0.1 second. Before, this test would fail ~1 time in 20 via
"make -j9 check" on a quad-core system.
Correct comment.
Diffstat (limited to 'tests/tail-2')
| -rwxr-xr-x | tests/tail-2/infloop-1 | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/tests/tail-2/infloop-1 b/tests/tail-2/infloop-1 index 6a456deac..72d51d975 100755 --- a/tests/tail-2/infloop-1 +++ b/tests/tail-2/infloop-1 @@ -27,16 +27,22 @@ yes > t & yes_pid=$! while :; do test -s t && break + sleep .1 done tail -n 1 t & tail_pid=$! kill $yes_pid # This test is racy, and can fail under unusual circumstances. -# On a busy system, "yes" will fail to write -# (and hence fail to be killed by SIGPIPE) in that 1-second interval. +# On a very busy system, tail will fail to notice that $yes_pid is gone. # Then the following kill will succeed and cause this test to fail. -sleep 1 + +# Wait for up to 3 seconds for tail to detect the death of $yes_pid. +for i in $(seq 30); do + kill -0 $tail_pid || break + echo sleep 0.1s + sleep .1 +done fail=0 kill $tail_pid && fail=1 || : |