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List:       freebsd-hackers
Subject:    Re: Working on NUMA support
From:       Adrian Chadd <adrian () freebsd ! org>
Date:       2014-07-30 0:36:28
Message-ID: CAJ-VmomMgvp4bBojiUFVDzSzLpbEdaG_1PFg79PMZXSxGN_CSA () mail ! gmail ! com
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On 29 July 2014 14:51, Andrew Bates <andrewbates09@gmail.com> wrote:
> Hey Adrian,
>
> Yes, there has been progress on this - although admittedly not as much as
> we'd like at this point.  I believe to what you're talking about, we have
> the layout for CPU affinity/locality.  I need to go through and cleanup a
> good half-dozen branches of code.
>
> Myself a mere mortal standing on the shoulders of giants in a room of
> titans, I have to merge in my changes with Jeff's pertinent branch to get
> this closer to useable.

Cool. What / where is jeff's branch? Is it public?

> From my experience and research, in terms of access/response time:
> 1. localized DMA < all remote
> 2. (localized DMA + spillover remote) >= all remote
>
> As ugly as it may be, I think I said that right..

Hm, what do you mean by spillover remote?

> There have been a few changes since that original email, but yes what we're
> working to address is the userland <---> kernelspace.

Cool. I'd like to get the kernel side worked out. :-)



-a
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