Re: Status of AIO

[Phillip Susi]

Ulrich Drepper wrote:
> What has network I/O to do with O_DIRECT?  I'm talking about async network I/O.

O_DIRECT allows for zero copy IO, which saves a boatload of cpu cycles. 
 For disk IO it is possible to use O_DIRECT without aio, but there is 
generally a loss of efficiency doing so.  For network IO, O_DIRECT is 
not even possible without aio.

By using aio and O_DIRECT for network IO, you can achieve massive 
performance and scalability gains.

You said before that the kernel aio interface is not suitable for 
sockets.  Why not?


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