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From Regis <xu.re...@gmail.com>
Subject Re: [jira] Created: (HARMONY-6328) [classlib][nio] optimize SocketChannel.write(ByteBuffer[], int, int) by writev
Date Thu, 03 Sep 2009 09:12:17 GMT
Regis Xu (JIRA) wrote:
> [classlib][nio] optimize SocketChannel.write(ByteBuffer[], int, int) by writev
> ------------------------------------------------------------------------------
> 
>                  Key: HARMONY-6328
>                  URL: https://issues.apache.org/jira/browse/HARMONY-6328
>              Project: Harmony
>           Issue Type: Improvement
>           Components: Classlib
>     Affects Versions: 5.0M11
>             Reporter: Regis Xu
> 
> 
> SocketChannel.write(ByteBuffer[], int, int) can be optimized by using writev, which can
write an array of buffer to socket without any stage buffer. If all passed in ByteBuffer is
direct buffer, they can be passed to system call directly without any copies.
> 

I tested the patch on Windows, Linux and AIX, nio tests are all passed. I know 
someone (Oliver, Kevin and Ray) are working on z/OS, I'm not sure whether writev 
  will work on it, so it would be great if someone can test the patch on z/OS 
before committing it.

And also, any comments and suggestions about this improvement are welcome :)

-- 
Best Regards,
Regis.

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