Davide Libenzi wrote:
Yes, that is some very interesting data IMO. I did not bench the GUASI
(userspace async thread library) against AIO, but those numbers show that a
*userspace* async syscall wrapper interface performs in the ballpark of AIO.
This leads to some hope about the ability to effectively deploy the kernel
generic async AIO (being it fibril or kthreads based) as low-impact async
provider for basically anything.
SGI's kaio patch to linux kind of went that route (using kthreads) for
non-SCSI async IO. It wasn't a bad way to go, but at least for
disk-based access they achieved much better results when they could go
right to the hardware.
--Chris
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