arch/powerpc/associativity.rst

2 NUMA resource associativity
10 characteristic is presented in terms of NUMA node distance within the Linux kernel.
24 Form 0 associativity supports only two NUMA distances (LOCAL and REMOTE).
29 device tree properties are used to determine the NUMA distance between resource groups/domains.
41 Linux kernel uses the domainID at the primary domainID index as the NUMA node id.
42 Linux kernel computes NUMA distance between two domains by recursively comparing
44 level of the resource group, the kernel doubles the NUMA distance between the
49 Form 2 associativity format adds separate device tree properties representing NUMA node distance
51 domain numbering. With numa distance computation now detached from the index value in
59 "ibm,numa-lookup-index-table" property contains a list of one or more numbers representing
61 used as an index while computing numa distance information via "ibm,numa-distance-table".
67 "ibm,numa-lookup-index-table" =  {4, 0, 8, 250, 252}. The offset of domainID 8 (2) is used when
71 "ibm,numa-distance-table" property contains a list of one or more numbers representing the NUMA
77 numa-lookup-index-table.
80 ibm,numa-lookup-index-table = <3 0 8 40>;
81 ibm,numa-distace-table = <9>, /bits/ 8 < 10  20  80 20  10 160 80 160  10>;