Date: Thu, 19 Feb 2015 13:32:13 -0800 From: "K. Macy" <kmacy@freebsd.org> To: John-Mark Gurney <jmg@funkthat.com> Cc: Alan Cox <alc@freebsd.org>, Konstantin Belousov <kib@freebsd.org>, "freebsd-arch@freebsd.org" <freebsd-arch@freebsd.org> Subject: Re: getting NUMA into the tree (userland most interesting for me) Message-ID: <CAHM0Q_NXfN-1jrBEOkQPw67fqL8yp9XBq8PUzJAB6nt89=GvrA@mail.gmail.com> In-Reply-To: <20150219041012.GJ1953@funkthat.com> References: <20150219041012.GJ1953@funkthat.com>
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On Wed, Feb 18, 2015 at 8:10 PM, John-Mark Gurney <jmg@funkthat.com> wrote: > I would like to help drive getting NUMA into the tree. Specificly, > getting userland allocations to be done from a specified domain. > > I've looked at the projects/numa tree, but it appears that not much was > done to get userland mappings to be NUMA aware. > > How are we going to do this? Do people have code to do this? > > I've looked at how Linux does this, at least from a programming > interface. They use mmap to create the mapping, and then use the call > mbind to tell the kernel where to handle the allocations. Is this > what people are thinking? > > I've checked the wiki status, and the userland section is quite > empty. > I personally don't think the infrastructure is far enough along that this is near to be an interesting value proposition. However, that said, I do believe that maintaining linux compatibility is important. Thus I would be for adding it to the linux compatibility layer and export it on the FreeBSD API side purely as an SPI until consensus is reached. -K
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