Performance patch for AIX system api support of sun.nio.ch.FileChannelImpl.transferTo0()
Alan Bateman
Alan.Bateman at oracle.com
Wed Oct 19 03:25:38 PDT 2011
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 automatically.
-Alan
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