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From "Travis Vitek (JIRA)" <>
Subject [jira] Commented: (STDCXX-536) allow thread safety tests to time out without failing
Date Fri, 29 Feb 2008 22:25:51 GMT


Travis Vitek commented on STDCXX-536:

We need to make some decisions here about how we want this to work. The options that I see

# If a test hits the hard timeout it fails. There is no soft timeout. This is the current
# The number of iterations for blocks of each test will be reduced as needed to execute before
the hard timeout.
# Tests will be split into multiple tests, each with its own hard timeout. May still require
tweaking to iteration count.
# Tests will be split into multiple tests, each of which can have their own soft timeout that
would allow it to exit just before the hard timeout.
# The test itself will specify a block of code that is to be executed under the soft timeout
by invoking a function at the begin and end of that block. That function will take a period
and a callback function [similar to alarm()]

Any other ideas or comments?

> allow thread safety tests to time out without failing
> -----------------------------------------------------
>                 Key: STDCXX-536
>                 URL:
>             Project: C++ Standard Library
>          Issue Type: Improvement
>          Components: Tests
>    Affects Versions: 4.2.0
>            Reporter: Martin Sebor
>            Assignee: Travis Vitek
>             Fix For: 4.2.1
>         Attachments: stdcxx-536.patch
> The newly added thread safety tests (and possibly some of the existing ones) tend to
run for a long time, consuming a lot of CPU cycles, and sometimes even failing due to a timeout
(currently 300 seconds in nightly builds). It would be useful to provide a mechanism such
as a command line option whereby the tests' runtime could be limited without necessarily causing
them to fail when the amount of time is exceeded. One way to do it would be for each test
to set an alarm in response to this command line option and in handler for the alarm set a
flag that each thread would check at each iteration of its loop to see if it should break.

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