6963027: TEST_BUG: channels and buffer tests need to run in samevm mode

[Kelly O'Hair]

On Jun 22, 2010, at 9:41 AM, Alan Bateman wrote:

>
> I've taken a pass over the nio tests so that the jdk_nio2 test  
> target (run the buffers and channels tests) now runs in samevm mode.
> The main thing with running tests in this mode is that tests need to  
> release resources so that subsequent tests don't fail because all  
> file descriptors are used or all socket buffers are exhausted. There  
> are a couple of tests that are essentially mini-stress tests and  
> these have been known to cause problems for tests that run  
> subsequently. I've dialed-down several of these tests. There are a  
> couple of tests that I've had to change to run explicitly in their  
> own VM. There are various reasons for this, but it's mostly the  
> tests that use memory-mapped files. Along the way I fixed a few  
> other random issues but for the most part, the changes are easy to  
> review.
>
> The webrev is here:
> http://cr.openjdk.java.net/~alanb/6963027/webrev/
>
> Kelly - I've changed test/Makefile to run this batch in samevm mode.  
> It may be that we need to do a bit of re-balancing to even up the  
> run times when running several batches concurrently (maybe move the  
> buffer tests to jdk_nio1, or jdk_nio3 once it runs in samevm mode).

Great stuff! Thanks Alan.

I looked over the Makefile and the more obvious 'othervm' additions,  
which look fine.
Can't attest to the detailed changes to some of the tests, might be  
better to have someone
else take a look at them, but as far as I'm concerned, I approve, and  
appreciate it.

-kto

>
> -Alan.