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https://jira.codehaus.org/browse/SUREFIRE-751?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=316581#comment-316581
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Andreas Gudian edited comment on SUREFIRE-751 at 1/3/13 2:49 PM:
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What a coincidence: I'm just working on a new examples page wrapping up the
forking and parallel options.
As for {{parallel}} and {{forkMode=perthread}}, you can actually use them
together - to some extent:
{{parallel=classes}} will have no effect when using {{forkMode=always}} or
{{forkMode=perthread}}. {{parallel=methods}} would work, however. Classes are
executed in {{threadCount=X}} concurrent processes ({{forkMode=perthread}}),
each of the processes can then use the same number of X threads to execute the
methods of one class in parallel. The option {{perCoreThreadCount}} only has an
effect on the number of threads for method-concurrency, but not on the number
of forked processes.
was (Author: agudian):
What a coincedence: I'm just working on a new examples page wrapping up the
forking and parallel options.
As for {{parallel}} and {{forkMode=perthread}}, you can actually use them
together - to some extent:
{{parallel=classes}} will have no effect when using {{forkMode=always}} or
{{forkMode=perthread}}. {{parallel=methods}} would work, however. Classes are
executed in {{threadCount=X}} concurrent processes ({{forkMode=perthread}}),
each of the processes can then use the same number of X threads to execute the
methods of one class in parallel. The option {{perCoreThreadCount}} only has an
effect on the number of threads for method-concurrency, but not on the number
of forked processes.
> Support parallel/fork mode similar to http://maven-junit-plugin.kenai.com/
> --------------------------------------------------------------------------
>
> Key: SUREFIRE-751
> URL: https://jira.codehaus.org/browse/SUREFIRE-751
> Project: Maven Surefire
> Issue Type: New Feature
> Components: process forking
> Affects Versions: 2.9
> Reporter: Stephen Connolly
> Assignee: Kristian Rosenvold
> Fix For: 2.13
>
> Attachments: SUREFIRE-751-part1.patch, SUREFIRE-751-part2.patch
>
>
> The current parallel execution spawns one thread _per_class_
> When there is a large disparity between the number of tests in different
> classes, this can result in a longer execution time. This can often happen in
> GUI testing, where a couple of classes will contain a lot of long running
> (but low cpu) test cases, and the remaining classes run fast.
> See http://maven-junit-plugin.kenai.com/ for an attempt at solving this
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