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From: Jim Meyering
Subject: bug#24516:
Date: Thu, 22 Sep 2016 23:00:38 -0700

Nelson Beebe reported that the backref-multibyte-slow test was
failing. From his log, where I saw max_seconds=1, and the following
timeout 1s ... timed out.

I concluded that something (load on the underlying system, disk/kernel
latency) caused that final grep to take far more wall-clock time than
the former one. This would be expected if some other build/test were
running concurrently.

To work around that, I've written the attached: when the timeout would
be just 1s, increase it to 3. In coreutils tests (because there are so
many, and some were so abusive, and running them in parallel...), we
ended up increasing most timeouts to 10s, but for now, that seems like
it'd be overkill here.

I have so far been able to reproduce that failure, so the above is
just an educated guess. If someone can reproduce the failure and test
the patch, that'd be great.

Attachment: grep-unwarranted-failure-of-backref-multibyte-slow.diff
Description: Binary data

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