Date: Wed, 8 Oct 2014 13:07:04 -0600 From: Warner Losh <imp@bsdimp.com> To: Adrian Chadd <adrian@FreeBSD.org> Cc: "freebsd-arch@freebsd.org" <freebsd-arch@freebsd.org> Subject: Re: [rfc] enumerating device / bus domain information Message-ID: <2975E3D3-0335-4739-9242-5733CCEE726C@bsdimp.com> In-Reply-To: <CAJ-VmokF7Ey0fxaQ7EMBJpCbgFnyOteiL2497Z4AFovc%2BQRkTA@mail.gmail.com>
index | next in thread | previous in thread | raw e-mail
[-- Attachment #1 --] On Oct 7, 2014, at 7:37 PM, Adrian Chadd <adrian@FreeBSD.org> wrote: > Hi, > > Right now we're not enumerating any NUMA domain information about devices. > > The more recent intel NUMA stuff has some extra affinity information > for devices that (eventually) will allow us to bind kernel/user > threads and/or memory allocation to devices to keep access local. > There's a penalty for DMAing in/out of remote memory, so we'll want to > figure out what counts as "Local" for memory allocation and perhaps > constrain the CPU set that worker threads for a device run on. > > This patch adds a few things: > > * it adds a bus_if.m method for fetching the VM domain ID of a given > device; or ENOENT if it's not in a VM domain; Maybe a default VM domain. All devices are in VM domains :) By default today, we have only one VM domain, and that’s the model that most of the code expects… Warner > * it adds some hooks to print the numa-domain out of a device if it exists; > * it adds hooks in srat.c to store the original proximity-id values > and uses them to map PXM to FreeBSD VM domain IDs; > * the ACPI code now has bus methods to enumerate which PXM (and thus > which VM domain) a device is on. > > The review for it is here: > > https://reviews.freebsd.org/D906 > > Please ignore the vm_phys.c patch; it's purely for experimenting on my > side and won't be committed part of this work. > > Thanks, > > > -a > _______________________________________________ > freebsd-arch@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-arch > To unsubscribe, send any mail to "freebsd-arch-unsubscribe@freebsd.org" [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Comment: GPGTools - https://gpgtools.org iQIcBAEBCgAGBQJUNYtYAAoJEGwc0Sh9sBEAIm0P/RhhRgO39Ui2UNUwerJ1jHJ6 Y+bH52tCdhlHZ5sLYEI+BeyB1DiKvvsre0Tu6NI3fXgV5uGNAGBfOrwkHnuVg2vo wF+1g/4K4WRVh4lNA7ikP+z+vm6f7NqImJ0ESIKBG/KO1ESK+q9gMn9+ixajA3vH wO87HJwbOEC+H9LjjaW76oF5XUnBaXVcpNRPUqafCHSG6HYalxLSkNyH96A/EUEM q4GI1o8xAkto6t9NXQ86ZoPHIDzeVQDrFmTaDsMGlFigbFJGr/yyuuLRuadALVJf bzGff6hiPdR7rPM6rAb3dkabnCbND4hazytNiI+4jx45gN9DoyxcDjcuyseXha8D lxgrTe2Y2O49J+vkv8gBKy4bxSD8+BdiQTi4Nms4Tip/FcrKvgHS8UqoCSh/QgcR HTJCzzXv4wQfHp9eEhoSEaPCa3nqeqf0JZr+likbd+j4f1WHbpQ9eARfujbHk/bX 1BVll5AcMDqZQ95E8fc3ug2BUQOFjhZ1CzUMSs4PCx03oDquaYiZdk57aeAn3hl9 UCoP32UzIhbStqTZp9Od7CnvwZHtFUxnoR+jOBsrqpPeiy9G7NQuY4ppebU+7804 xmgL9OV/2YVZOod3WHgCgUAnQib1ANtiiSk4aGJ9NambQmTX1pOTVKUkCvHq22oq /qwi8/1i1ijtHFpR6AVj =o5yk -----END PGP SIGNATURE-----home | help
Want to link to this message? Use this
URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?2975E3D3-0335-4739-9242-5733CCEE726C>