Potential timeout issues - tests running in the same vm

Kelly O'Hair kelly.ohair at oracle.com
Wed Nov 16 17:21:03 UTC 2011

On Nov 16, 2011, at 8:56 AM, Alan Bateman wrote:

> On 16/11/2011 16:29, Gary Adams wrote:
>> The jtreg tests that use othervm along with a timeout argument should be
>> fairly reliable in getting a consistent result. The tests that did not specify
>> othervm may run into problems, if they are run concurrently with other tests.
>> Here's a quick sampling of the java/util and java/lang tests that might have issues.
>> Would there be any harm in changing these to designate running in othervm mode?
> With jtreg then tests don't run concurrently in the same VM. By default then each test is run in its own VM, unless you use the -samevm or -agentvm options, in which case the tests run sequentially in the same (or an agent) VM -- ie: othervm is the default. So I don't think there is a problem and we definitely don't want to add /othervm to tests if we can avoid it (as it slows down the test execution).
> -Alan

But if the test naturally runs long enough, any win from using samevm for that particular testcase is kind of minimal.
And if using samevm makes the test less reliable or makes the other tests sharing it's crib less reliable,
then I have no issue giving these babies their own cribs. ;^)


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