Ryan Harper wrote:
* Anthony Liguori <[EMAIL PROTECTED]> [2008-09-22 22:44]:
Can you run the same performance tests with the following patches (using
sync=on instead of cache=off)?
You'll need my aio_init fix too. I suspect this will give equally good
performance to your patch set. That's not saying your patch set isn't
useful, but I would like to get performance to be better for the case
that we're going through the page cache.
I can run the test, but it is orthogonal to the patchset which is
focused on using O_DIRECT and linux-aio.
Yes, I'm trying to understand where the performance is coming from. The
hunch is that supporting multiple simultaneous requests along is what
did it. O_SYNC should give similar completion behavior to O_DIRECT.
Regards,
Anthony Liguori
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