Performance patch for AIX system api support of sun.nio.ch.FileChannelImpl.transferTo0()

[Charles Lee]

On 10/18/2011 01:48 PM, Deven wrote:
> Hi nio-devs,
>
>     sun.nio.ch.FileChannelImpl.transferTo0() native method will take 
> advantage of Linux/Solaris system snedfile() apis to improve the 
> performance of 
> FileChannel.transferTo(long position,long count,WritableByteChannel 
> <http://download.oracle.com/javase/7/docs/api/java/nio/channels/WritableByteChannel.html> target). 
>
>
>     On AIX there is a similar system api called send_file() which will 
> do the similar things Linux/Solaris sendfile() will do, however 
> current transferTo0() dose not use it to optimize AIX performance.
>
>      This patch add AIX send_file() into the transferTo0() native 
> method, so AIX could also take advantage of AIX system api support for 
> transferTo operation and will improve the performance of 
> FileChannelImpl.transferTo() .
>
>      The attached TransferToClient.java and TransferToServer.java is 
> the performance test which can test the FileChannelImpl.transferTo() 
> performance.
>
>      If there is anybody could review this patch and give your 
> suggestion?
>
> Best regards!
>

Hi Deven,

Can you help to make a webrev for other's review?

Just with a quick glance, your patch has some format issues. Please keep 
to follow the code convention from 
http://www.oracle.com/technetwork/java/codeconvtoc-136057.html

Hi Alan,

Are there any examples of the performance test cases?

-- 
Yours Charles

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