P.S Looking forward to this issue. Just ordered the cheapest quad core
laptop I could find :) So long dual core.
- Mark
Mark Miller wrote:
I found a couple external solutions last I looked. They appeared to
have various limitations though. I really think, longer term, the
built in support is the way to go. I'd hate to require a certain
version of ANT (its only the very latest 4.6 release), but perhaps we
could set it up to work easily in the case that you do have the right
version, or we could package it up as a contrib somehow?
Thats where the plug-ability of an external is nice - but for long
term maintainability and correctness - I'd lean towards built in
support myself.
### Test scheduling strategies ###
`JUnitCore` now includes an experimental method that allows you to
specify a model of the `Computer` that runs your tests. Currently,
the only built-in Computers are the default, serial runner, and two
runners provided in the `ParallelRunner` class:
`ParallelRunner.classes()`, which runs classes in parallel, and
`ParallelRunner.methods()`, which runs classes and methods in parallel.
This feature is currently less stable than MaxCore, and may be
merged with MaxCore in some way in the future.
Example:
public static class Example {
@Test public void one() throws InterruptedException {
Thread.sleep(1000);
}
@Test public void two() throws InterruptedException {
Thread.sleep(1000);
}
}
@Test public void testsRunInParallel() {
long start= System.currentTimeMillis();
Result result= JUnitCore.runClasses(ParallelComputer.methods(),
Example.class);
assertTrue(result.wasSuccessful());
long end= System.currentTimeMillis();
assertThat(end - start, betweenInclusive(1000, 1500));
}
- Mark
Jason Rutherglen wrote:
There's this foreach parallel ant-contrib task. Perhaps we have a
winner!
http://www.jadeliquid.com/liquidtest/docs/doku.php?id=developers:cookbooks:scaling_liquidtest_with_junit_parallel:home
http://ant-contrib.sourceforge.net/tasks/tasks/foreach.html
On Thu, Jun 25, 2009 at 7:14 PM, Mark Miller <markrmil...@gmail.com
<mailto:markrmil...@gmail.com>> wrote:
JUnit also supports parallelizing tasks, but its only in the very
latest release. I'd check out that. There are generally more
issues than just firing off multiple tests at once.
-- - Mark
http://www.lucidimagination.com
Jason Rutherglen (JIRA) wrote:
[
https://issues.apache.org/jira/browse/LUCENE-1709?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12724325#action_12724325
<https://issues.apache.org/jira/browse/LUCENE-1709?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12724325#action_12724325>
]
Jason Rutherglen commented on LUCENE-1709:
------------------------------------------
{quote} Do you mean that you would implement your own task? In
which module would you put this custom ant task? {quote}
Yes, seems creating a custom task should work? In contrib/ant?
Last time I tried to use Maven I couldn't get it to work (was
running into a bug) so my knowledge isn't very good. We're using
ant and ivy for our webapp dev. I don't know what Lucene's
position is on Maven, but am interested pursuing whatever makes
sense.
Parallelize Tests
-----------------
Key: LUCENE-1709
URL:
https://issues.apache.org/jira/browse/LUCENE-1709
Project: Lucene - Java
Issue Type: Improvement
Components: Index
Affects Versions: 2.4.1
Reporter: Jason Rutherglen
Fix For: 3.0
Original Estimate: 48h
Remaining Estimate: 48h
The Lucene tests can be parallelized to make for a faster
testing system. This task from ANT can be used:
http://ant.apache.org/manual/CoreTasks/parallel.html
Previous discussion:
http://www.gossamer-threads.com/lists/lucene/java-dev/69669
Notes from Mike M.:
{quote}
I'd love to see a clean solution here (the tests are
embarrassingly
parallelizable, and we all have machines with good
concurrency these
days)... I have a rather hacked up solution now, that uses
"-Dtestpackage=XXX" to split the tests up.
Ideally I would be able to say "use N threads" and it'd do
the right
thing... like the -j flag to make.
{quote}
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