Messages in this thread | | | Subject | Re: Status of AIO | From | Nicholas Miell <> | Date | Mon, 06 Mar 2006 17:37:13 -0800 |
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On Tue, 2006-03-07 at 03:30 +0200, Dan Aloni wrote: > On Mon, Mar 06, 2006 at 04:18:54PM -0500, Benjamin LaHaise wrote: > > On Mon, Mar 06, 2006 at 08:24:03AM +0200, Dan Aloni wrote: > > > Hello, > > > > > > I'm trying to assert the status of AIO under the current version > > > of Linux 2.6. However by searching I wasn't able to find any > > > indication about it's current state. Is there anyone using it > > > under a production environment? > > > > For O_DIRECT aio things are pretty stable (barring a patch to improve -EIO > > handling). The functionality is used by the various databases, so it gets > > a fair amount of exercise. > > > > > I'd like to know how complete it is and whether socket AIO is > > > adaquately supported. > > > > Socket AIO is not supported yet, but it is useful to get user requests to > > know there is demand for it. > > Well, I've written a small test app to see if it works with network > sockets and apparently it did for that small test case (connect() > with aio_read(), loop with aio_error(), and aio_return()). I thought > perhaps the glibc implementation was running behind the scene, so I've > checked to see if it a thread was created in the background and I > there wasn't any thread.
None of the aio_* functions use the kernel's AIO interface. They're implemented entirely in userspace using a thread pool.
-- Nicholas Miell <nmiell@comcast.net>
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