Fwd: Re: Passing time factor to tests run under jtreg
gary.adams at oracle.com
Wed Nov 16 05:08:29 PST 2011
I'm investigating the current jdk tests with timeouts to see if we
can make them more reliable for slower machines. As a a first step,
I want to see if the jtreg command line arguments can be made
visible to the individual test.
Second I want to explore the information about the target machine that
can help adjust time limits from the time sensitive tests.
-------- Original Message --------
Subject: Re: Passing time factor to tests run under jtreg
Date: Tue, 15 Nov 2011 22:45:03 +0000
From: Alan Bateman <Alan.Bateman at oracle.com>
To: gary Adams <Gary.Adams at Oracle.COM>
CC: core-libs-dev at openjdk.java.net
Gary - this might be something to bring up on the jtreg-use list.
Ideally the tests wouldn't have any hardcoded timeouts but sometimes
there isn't any other choice.
On 15/11/2011 20:14, Gary Adams wrote:
> I've been scanning a number of the slow machine test
> bugs that are reported and wanted to check to see if
> anyone has looked into time dependencies in the regression
> tests previously. From what I've been able to learn so far
> individual bugs can use the "timeout" parameter to indicate to
> the test harness an expected time to run.
> The test harness has command line arguments where it can
> filter out tests that take too long (timelimit) or can apply a
> multiplier to
> to the timeout when conditions are known to slow down the process
> (timeoutFactor). e.g. 8X for a slow machine or running with -Xcomp
> I see that there are some wrappers that can be applied around running
> a particular test to allow processing before main(). Could this mechanism
> be exploited so the harness command line options could be made known
> to the time dependent tests as command line arguments or as system
> My thought is the current timeout granularity is too large and only
> to the full test execution. If a test knew that a timeoutFactor was to
> be applied,
> it could internally adjust the time dependent delays appropriately. e.g.
> not every sleep(), await(), join() with timeouts would need the
> Before any test could be updated the information would need to be
> from the test context.
> Any feedback/pointers appreciated!
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