On 7/1/15 14:18 , Steve wrote: > WARNING: Couldn't read ACPI SRAT table from BIOS. lgrp support will be > limited to one group. > > I get that you only have one group, what kind of scenarios does one run > into where multiple are beneficial? I'm thinking that maybe with > multiple CPU's and VM's that could become handy, but I really don't know > as I never ran into it until booting SmartOS on a desktop computer.
lgrp information is most pertinent when you have more than one socket. This was first encounterd when we had various systems (maybe Dell IIRC) that didn't have multiple lgrps configured because the bios had a switch on whether or not to include information about them. The general purpose of lgrps is for NUMA. Take a two socket server, the memory will be divided into groups and it will be closer to one CPU as opposed to another. This is used for scheduling information, making optimizations in the VM subsystem, etc. If you only have one socket, then you likely wouldn't have more than one table anyways. We should probably consider not printing out the message if you only have one socket. Does that help clarify what's going on here? Robert ------------------------------------------- smartos-discuss Archives: https://www.listbox.com/member/archive/184463/=now RSS Feed: https://www.listbox.com/member/archive/rss/184463/25769125-55cfbc00 Modify Your Subscription: https://www.listbox.com/member/?member_id=25769125&id_secret=25769125-7688e9fb Powered by Listbox: http://www.listbox.com
