More fine-grained NUMA knobs

[Adrian Chadd]

+1 by me!


-a


On 22 March 2016 at 17:13, John Baldwin <jhb at freebsd.org> wrote:
> Some of the I/O device affinity stuff such as bus_get_domain() (and the
> bus_get_cpus() I have in review in D5519) are useful on their own right even
> if the VM system is not doing NUMA-aware allocations.  I think it would be
> useful to be able to enable these two "prongs" of NUMA awareness
> independently.  To that end, I have a little strawman patch that adds two
> new kernel options: VM_NUMA_ALLOC and DEVICE_NUMA.  I actually think it is
> probably worth enabling DEVICE_NUMA by default on x86 (and bumping the
> default MAXMEMDOM to, say, 8 (quad-socket haswell)).
>
> You can see the simple patch at:
>
> https://github.com/bsdjhb/freebsd/compare/master...bsdjhb:numa_opts
>
> Thoughts?
>
> --
> John Baldwin
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