Performance patch for AIX system api support of sun.nio.ch.FileChannelImpl.transferTo0()
littlee at linux.vnet.ibm.com
Wed Oct 19 04:56:44 PDT 2011
On 10/19/2011 06:25 PM, Alan Bateman wrote:
> Charles Lee wrote:
>> Hi Alan,
>> Are there any examples of the performance test cases?
> The tests in the jdk repository are regression tests (many unit tests
> too). It's not really suitable for performance tests as performance
> tests need carefully controlled environments in other to detect
> performance regressions. If we run performance tests that fail if the
> performance is lower that expected then those tests will likely fail
> regularly. For example if you run the tests via the Makefile and use
> --jobs then there are tests running concurrently with unpredictable
> load. So we (in Oracle anyway) haven't been pushing performance tests
> to the jdk repository. There are exceptions so if you look around you
> will see some tests.
> jdk/test/java/nio/channels/Selector/LotsOfCancels.java is one example
> but if you look closely it doesn't have an @test tag so it's not run
Thanks Alan. Any requirements for performance patches to contribute?
Test case? Test result?
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