Hi Yinghai, On Fri, Apr 03, 2009 at 01:49:27PM -0700, Yinghai Lu wrote: > On Fri, Apr 3, 2009 at 1:16 PM, Brice Goglin <Brice.Goglin@xxxxxxxx> wrote: > > Chris Worley wrote: > >> Sorry for an off topic, but I'm hoping somebody can point me in the > >> right direction of where to direct this question... > >> > >> I have an Opteron system where I've seen the HW diagrams, and each of > >> 4 sockets is directly connected (HT) to two other sockets, and two HT > >> hops away from a third (i.e. a simple square topology, no X in the > >> middle). > >> > >> Yet, "numactl --hardware" shows but one hop to each socket: > >> > >> # numactl --hardware > >> ... > >> node 0 1 2 3 > >> 0: 10 20 20 20 > >> 1: 20 10 20 20 > >> 2: 20 20 10 20 > >> 3: 20 20 20 10 > >> > >> I know this is wrong. > >> > >> Who would be the right person (or list) to talk about this? Could you try the latest version? It's available at ftp://oss.sgi.com/www/projects/libnuma/download/ -Cliff > >> > > > > IIRC, the motherboard/BIOS is supposed to report numa distances through > > the PXM ACPI method. But I have never seen any opteron box do it > > properly. So you just get 10 for "local" and 20 for "remote". Some > > Itanium machines however report actual distances. > > for x86 64 bit, we are copying SLIT table and save another copy. > > could provide one /sys interface to make user could modify it... > > YH > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ -- Cliff Wickman Silicon Graphics, Inc. cpw@xxxxxxx (651) 683-3824 -- To unsubscribe from this list: send the line "unsubscribe linux-numa" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
