Re: [PATCH] mm/alloc: fallback to first node if the wanted node offline

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On Wed, Dec 5, 2018 at 5:43 PM Michal Hocko <mhocko@xxxxxxxxxx> wrote:
>
> On Wed 05-12-18 17:29:31, Pingfan Liu wrote:
> > On Wed, Dec 5, 2018 at 5:21 PM Michal Hocko <mhocko@xxxxxxxxxx> wrote:
> > >
> > > On Wed 05-12-18 13:38:17, Pingfan Liu wrote:
> > > > On Tue, Dec 4, 2018 at 4:56 PM Michal Hocko <mhocko@xxxxxxxxxx> wrote:
> > > > >
> > > > > On Tue 04-12-18 16:20:32, Pingfan Liu wrote:
> > > > > > On Tue, Dec 4, 2018 at 3:22 PM Michal Hocko <mhocko@xxxxxxxxxx> wrote:
> > > > > > >
> > > > > > > On Tue 04-12-18 11:05:57, Pingfan Liu wrote:
> > > > > > > > During my test on some AMD machine, with kexec -l nr_cpus=x option, the
> > > > > > > > kernel failed to bootup, because some node's data struct can not be allocated,
> > > > > > > > e.g, on x86, initialized by init_cpu_to_node()->init_memory_less_node(). But
> > > > > > > > device->numa_node info is used as preferred_nid param for
> > > > > > > > __alloc_pages_nodemask(), which causes NULL reference
> > > > > > > >   ac->zonelist = node_zonelist(preferred_nid, gfp_mask);
> > > > > > > > This patch tries to fix the issue by falling back to the first online node,
> > > > > > > > when encountering such corner case.
> > > > > > >
> > > > > > > We have seen similar issues already and the bug was usually that the
> > > > > > > zonelists were not initialized yet or the node is completely bogus.
> > > > > > > Zonelists should be initialized by build_all_zonelists quite early so I
> > > > > > > am wondering whether the later is the case. What is the actual node
> > > > > > > number the device is associated with?
> > > > > > >
> > > > > > The device's node num is 2. And in my case, I used nr_cpus param. Due
> > > > > > to init_cpu_to_node() initialize all the possible node.  It is hard
> > > > > > for me to figure out without this param, how zonelists is accessed
> > > > > > before page allocator works.
> > > > >
> > > > > I believe we should focus on this. Why does the node have no zonelist
> > > > > even though all zonelists should be initialized already? Maybe this is
> > > > > nr_cpus pecularity and we do not initialize all the existing numa nodes.
> > > > > Or maybe the device is associated to a non-existing node with that
> > > > > setup. A full dmesg might help us here.
> > > > >
> > > > Requiring the machine again, and I got the following without nr_cpus option
> > > > [root@dell-per7425-03 ~]# cd /sys/devices/system/node/
> > > > [root@dell-per7425-03 node]# ls
> > > > has_cpu  has_memory  has_normal_memory  node0  node1  node2  node3
> > > > node4  node5  node6  node7  online  possible  power  uevent
> > > > [root@dell-per7425-03 node]# cat has_cpu
> > > > 0-7
> > > > [root@dell-per7425-03 node]# cat has_memory
> > > > 1,5
> > > > [root@dell-per7425-03 node]# cat online
> > > > 0-7
> > > > [root@dell-per7425-03 node]# cat possible
> > > > 0-7
> > > > And lscpu shows the following numa-cpu info:
> > > > NUMA node0 CPU(s):     0,8,16,24
> > > > NUMA node1 CPU(s):     2,10,18,26
> > > > NUMA node2 CPU(s):     4,12,20,28
> > > > NUMA node3 CPU(s):     6,14,22,30
> > > > NUMA node4 CPU(s):     1,9,17,25
> > > > NUMA node5 CPU(s):     3,11,19,27
> > > > NUMA node6 CPU(s):     5,13,21,29
> > > > NUMA node7 CPU(s):     7,15,23,31
> > > >
> > > > For the full panic message (I masked some hostname info with xx),
> > > > please see the attachment.
> > > > In a short word, it seems a problem with nr_cpus, if without this
> > > > option, the kernel can bootup correctly.
> > >
> > > Yep.
> > > [    0.007418] Early memory node ranges
> > > [    0.007419]   node   1: [mem 0x0000000000001000-0x000000000008efff]
> > > [    0.007420]   node   1: [mem 0x0000000000090000-0x000000000009ffff]
> > > [    0.007422]   node   1: [mem 0x0000000000100000-0x000000005c3d6fff]
> > > [    0.007422]   node   1: [mem 0x00000000643df000-0x0000000068ff7fff]
> > > [    0.007423]   node   1: [mem 0x000000006c528000-0x000000006fffffff]
> > > [    0.007424]   node   1: [mem 0x0000000100000000-0x000000047fffffff]
> > > [    0.007425]   node   5: [mem 0x0000000480000000-0x000000087effffff]
> > >
> > > There is clearly no node2. Where did the driver get the node2 from?
> > Since using nr_cpus=4 , the node2 is not be instanced by x86 initalizing code.
> > For the normal bootup, having the following:
> > [    0.007704] Movable zone start for each node
> > [    0.007707] Early memory node ranges
> > [    0.007708]   node   1: [mem 0x0000000000001000-0x000000000008efff]
> > [    0.007709]   node   1: [mem 0x0000000000090000-0x000000000009ffff]
> > [    0.007711]   node   1: [mem 0x0000000000100000-0x000000005c3d6fff]
> > [    0.007712]   node   1: [mem 0x00000000643df000-0x0000000068ff7fff]
> > [    0.007712]   node   1: [mem 0x000000006c528000-0x000000006fffffff]
> > [    0.007713]   node   1: [mem 0x0000000100000000-0x000000047fffffff]
> > [    0.007714]   node   5: [mem 0x0000000480000000-0x000000087effffff]
> > [    0.008434] Zeroed struct page in unavailable ranges: 46490 pages
>
> Hmm, this is even more interesting. So even a normal boot doesn't have
> node 2. So where exactly does the device get its affinity from?
>
I am afraid that there is maybe some misunderstanding, but for the
normal bootup, the full boot msg shows the existence of node 2
First, the following can be observed:
[    0.007385] SRAT: PXM 0 -> APIC 0x00 -> Node 0
[    0.007386] SRAT: PXM 0 -> APIC 0x01 -> Node 0
[    0.007387] SRAT: PXM 0 -> APIC 0x08 -> Node 0
[    0.007388] SRAT: PXM 0 -> APIC 0x09 -> Node 0
[    0.007389] SRAT: PXM 1 -> APIC 0x10 -> Node 1
[    0.007390] SRAT: PXM 1 -> APIC 0x11 -> Node 1
[    0.007391] SRAT: PXM 1 -> APIC 0x18 -> Node 1
[    0.007392] SRAT: PXM 1 -> APIC 0x19 -> Node 1
[    0.007393] SRAT: PXM 2 -> APIC 0x20 -> Node 2
[    0.007394] SRAT: PXM 2 -> APIC 0x21 -> Node 2
[    0.007395] SRAT: PXM 2 -> APIC 0x28 -> Node 2
[    0.007396] SRAT: PXM 2 -> APIC 0x29 -> Node 2
[    0.007397] SRAT: PXM 3 -> APIC 0x30 -> Node 3
[    0.007398] SRAT: PXM 3 -> APIC 0x31 -> Node 3
[    0.007399] SRAT: PXM 3 -> APIC 0x38 -> Node 3
[    0.007400] SRAT: PXM 3 -> APIC 0x39 -> Node 3
[    0.007401] SRAT: PXM 4 -> APIC 0x40 -> Node 4
[    0.007402] SRAT: PXM 4 -> APIC 0x41 -> Node 4
[    0.007403] SRAT: PXM 4 -> APIC 0x48 -> Node 4
[    0.007403] SRAT: PXM 4 -> APIC 0x49 -> Node 4
[    0.007404] SRAT: PXM 5 -> APIC 0x50 -> Node 5
[    0.007405] SRAT: PXM 5 -> APIC 0x51 -> Node 5
[    0.007406] SRAT: PXM 5 -> APIC 0x58 -> Node 5
[    0.007407] SRAT: PXM 5 -> APIC 0x59 -> Node 5
[    0.007408] SRAT: PXM 6 -> APIC 0x60 -> Node 6
[    0.007409] SRAT: PXM 6 -> APIC 0x61 -> Node 6
[    0.007410] SRAT: PXM 6 -> APIC 0x68 -> Node 6
[    0.007411] SRAT: PXM 6 -> APIC 0x69 -> Node 6
[    0.007412] SRAT: PXM 7 -> APIC 0x70 -> Node 7
[    0.007413] SRAT: PXM 7 -> APIC 0x71 -> Node 7
[    0.007414] SRAT: PXM 7 -> APIC 0x78 -> Node 7
[    0.007414] SRAT: PXM 7 -> APIC 0x79 -> Node 7

Second:
[    0.024497] NODE_DATA(2) allocated [mem 0x87ef4b000-0x87ef75fff]
[    0.024498]     NODE_DATA(2) on node 5
[    0.024530] Initmem setup node 2 [mem 0x0000000000000000-0x0000000000000000]

Besides these,  as I pasted, when normal bootup, lscpu shows the: NUMA
node2 CPU(s):     4,12,20,28
and
[root@dell-per7425-03 node]# cat has_cpu
0-7
[root@dell-per7425-03 node]# cat has_memory
1,5
So I think node 2 exists, which has cpus but no memory.

I attach SRAT, which show there are eight Proximity Domain. As my
understanding, each Proximity Domain will correspond to a numa node.
Cced acpi guys and hope them can give some hints.

> I suspect we are looking at two issues here. The first one, and a more
> important one is that there is a NUMA affinity configured for the device
> to a non-existing node. The second one is that nr_cpus affects
> initialization of possible nodes.

The dev->numa_node info is extracted from acpi table, not depends on
the instance of numa-node, which may be limited by nr_cpus. Hence the
node is existing, just not instanced.

Thanks,
Pingfan
/*
 * Intel ACPI Component Architecture
 * AML/ASL+ Disassembler version 20160527-64
 * Copyright (c) 2000 - 2016 Intel Corporation
 * 
 * Disassembly of ./SRAT.dat, Wed Dec  5 21:56:44 2018
 *
 * ACPI Data Table [SRAT]
 *
 * Format: [HexOffset DecimalOffset ByteLength]  FieldName : FieldValue
 */

[000h 0000   4]                    Signature : "SRAT"    [System Resource Affinity Table]
[004h 0004   4]                 Table Length : 000002D0
[008h 0008   1]                     Revision : 03
[009h 0009   1]                     Checksum : 39
[00Ah 0010   6]                       Oem ID : "DELL  "
[010h 0016   8]                 Oem Table ID : "PE_SC3  "
[018h 0024   4]                 Oem Revision : 00000001
[01Ch 0028   4]              Asl Compiler ID : "AMD "
[020h 0032   4]        Asl Compiler Revision : 00000001

[024h 0036   4]               Table Revision : 00000001
[028h 0040   8]                     Reserved : 0000000000000000

[030h 0048   1]                Subtable Type : 00 [Processor Local APIC/SAPIC Affinity]
[031h 0049   1]                       Length : 10

[032h 0050   1]      Proximity Domain Low(8) : 00
[033h 0051   1]                      Apic ID : 00
[034h 0052   4]        Flags (decoded below) : 00000001
                                     Enabled : 1
[038h 0056   1]              Local Sapic EID : 00
[039h 0057   3]    Proximity Domain High(24) : 000000
[03Ch 0060   4]                 Clock Domain : 00000000

[040h 0064   1]                Subtable Type : 00 [Processor Local APIC/SAPIC Affinity]
[041h 0065   1]                       Length : 10

[042h 0066   1]      Proximity Domain Low(8) : 00
[043h 0067   1]                      Apic ID : 01
[044h 0068   4]        Flags (decoded below) : 00000001
                                     Enabled : 1
[048h 0072   1]              Local Sapic EID : 00
[049h 0073   3]    Proximity Domain High(24) : 000000
[04Ch 0076   4]                 Clock Domain : 00000000

[050h 0080   1]                Subtable Type : 00 [Processor Local APIC/SAPIC Affinity]
[051h 0081   1]                       Length : 10

[052h 0082   1]      Proximity Domain Low(8) : 00
[053h 0083   1]                      Apic ID : 08
[054h 0084   4]        Flags (decoded below) : 00000001
                                     Enabled : 1
[058h 0088   1]              Local Sapic EID : 00
[059h 0089   3]    Proximity Domain High(24) : 000000
[05Ch 0092   4]                 Clock Domain : 00000000

[060h 0096   1]                Subtable Type : 00 [Processor Local APIC/SAPIC Affinity]
[061h 0097   1]                       Length : 10

[062h 0098   1]      Proximity Domain Low(8) : 00
[063h 0099   1]                      Apic ID : 09
[064h 0100   4]        Flags (decoded below) : 00000001
                                     Enabled : 1
[068h 0104   1]              Local Sapic EID : 00
[069h 0105   3]    Proximity Domain High(24) : 000000
[06Ch 0108   4]                 Clock Domain : 00000000

[070h 0112   1]                Subtable Type : 00 [Processor Local APIC/SAPIC Affinity]
[071h 0113   1]                       Length : 10

[072h 0114   1]      Proximity Domain Low(8) : 01
[073h 0115   1]                      Apic ID : 10
[074h 0116   4]        Flags (decoded below) : 00000001
                                     Enabled : 1
[078h 0120   1]              Local Sapic EID : 00
[079h 0121   3]    Proximity Domain High(24) : 000000
[07Ch 0124   4]                 Clock Domain : 00000000

[080h 0128   1]                Subtable Type : 00 [Processor Local APIC/SAPIC Affinity]
[081h 0129   1]                       Length : 10

[082h 0130   1]      Proximity Domain Low(8) : 01
[083h 0131   1]                      Apic ID : 11
[084h 0132   4]        Flags (decoded below) : 00000001
                                     Enabled : 1
[088h 0136   1]              Local Sapic EID : 00
[089h 0137   3]    Proximity Domain High(24) : 000000
[08Ch 0140   4]                 Clock Domain : 00000000

[090h 0144   1]                Subtable Type : 00 [Processor Local APIC/SAPIC Affinity]
[091h 0145   1]                       Length : 10

[092h 0146   1]      Proximity Domain Low(8) : 01
[093h 0147   1]                      Apic ID : 18
[094h 0148   4]        Flags (decoded below) : 00000001
                                     Enabled : 1
[098h 0152   1]              Local Sapic EID : 00
[099h 0153   3]    Proximity Domain High(24) : 000000
[09Ch 0156   4]                 Clock Domain : 00000000

[0A0h 0160   1]                Subtable Type : 00 [Processor Local APIC/SAPIC Affinity]
[0A1h 0161   1]                       Length : 10

[0A2h 0162   1]      Proximity Domain Low(8) : 01
[0A3h 0163   1]                      Apic ID : 19
[0A4h 0164   4]        Flags (decoded below) : 00000001
                                     Enabled : 1
[0A8h 0168   1]              Local Sapic EID : 00
[0A9h 0169   3]    Proximity Domain High(24) : 000000
[0ACh 0172   4]                 Clock Domain : 00000000

[0B0h 0176   1]                Subtable Type : 00 [Processor Local APIC/SAPIC Affinity]
[0B1h 0177   1]                       Length : 10

[0B2h 0178   1]      Proximity Domain Low(8) : 02
[0B3h 0179   1]                      Apic ID : 20
[0B4h 0180   4]        Flags (decoded below) : 00000001
                                     Enabled : 1
[0B8h 0184   1]              Local Sapic EID : 00
[0B9h 0185   3]    Proximity Domain High(24) : 000000
[0BCh 0188   4]                 Clock Domain : 00000000

[0C0h 0192   1]                Subtable Type : 00 [Processor Local APIC/SAPIC Affinity]
[0C1h 0193   1]                       Length : 10

[0C2h 0194   1]      Proximity Domain Low(8) : 02
[0C3h 0195   1]                      Apic ID : 21
[0C4h 0196   4]        Flags (decoded below) : 00000001
                                     Enabled : 1
[0C8h 0200   1]              Local Sapic EID : 00
[0C9h 0201   3]    Proximity Domain High(24) : 000000
[0CCh 0204   4]                 Clock Domain : 00000000

[0D0h 0208   1]                Subtable Type : 00 [Processor Local APIC/SAPIC Affinity]
[0D1h 0209   1]                       Length : 10

[0D2h 0210   1]      Proximity Domain Low(8) : 02
[0D3h 0211   1]                      Apic ID : 28
[0D4h 0212   4]        Flags (decoded below) : 00000001
                                     Enabled : 1
[0D8h 0216   1]              Local Sapic EID : 00
[0D9h 0217   3]    Proximity Domain High(24) : 000000
[0DCh 0220   4]                 Clock Domain : 00000000

[0E0h 0224   1]                Subtable Type : 00 [Processor Local APIC/SAPIC Affinity]
[0E1h 0225   1]                       Length : 10

[0E2h 0226   1]      Proximity Domain Low(8) : 02
[0E3h 0227   1]                      Apic ID : 29
[0E4h 0228   4]        Flags (decoded below) : 00000001
                                     Enabled : 1
[0E8h 0232   1]              Local Sapic EID : 00
[0E9h 0233   3]    Proximity Domain High(24) : 000000
[0ECh 0236   4]                 Clock Domain : 00000000

[0F0h 0240   1]                Subtable Type : 00 [Processor Local APIC/SAPIC Affinity]
[0F1h 0241   1]                       Length : 10

[0F2h 0242   1]      Proximity Domain Low(8) : 03
[0F3h 0243   1]                      Apic ID : 30
[0F4h 0244   4]        Flags (decoded below) : 00000001
                                     Enabled : 1
[0F8h 0248   1]              Local Sapic EID : 00
[0F9h 0249   3]    Proximity Domain High(24) : 000000
[0FCh 0252   4]                 Clock Domain : 00000000

[100h 0256   1]                Subtable Type : 00 [Processor Local APIC/SAPIC Affinity]
[101h 0257   1]                       Length : 10

[102h 0258   1]      Proximity Domain Low(8) : 03
[103h 0259   1]                      Apic ID : 31
[104h 0260   4]        Flags (decoded below) : 00000001
                                     Enabled : 1
[108h 0264   1]              Local Sapic EID : 00
[109h 0265   3]    Proximity Domain High(24) : 000000
[10Ch 0268   4]                 Clock Domain : 00000000

[110h 0272   1]                Subtable Type : 00 [Processor Local APIC/SAPIC Affinity]
[111h 0273   1]                       Length : 10

[112h 0274   1]      Proximity Domain Low(8) : 03
[113h 0275   1]                      Apic ID : 38
[114h 0276   4]        Flags (decoded below) : 00000001
                                     Enabled : 1
[118h 0280   1]              Local Sapic EID : 00
[119h 0281   3]    Proximity Domain High(24) : 000000
[11Ch 0284   4]                 Clock Domain : 00000000

[120h 0288   1]                Subtable Type : 00 [Processor Local APIC/SAPIC Affinity]
[121h 0289   1]                       Length : 10

[122h 0290   1]      Proximity Domain Low(8) : 03
[123h 0291   1]                      Apic ID : 39
[124h 0292   4]        Flags (decoded below) : 00000001
                                     Enabled : 1
[128h 0296   1]              Local Sapic EID : 00
[129h 0297   3]    Proximity Domain High(24) : 000000
[12Ch 0300   4]                 Clock Domain : 00000000

[130h 0304   1]                Subtable Type : 00 [Processor Local APIC/SAPIC Affinity]
[131h 0305   1]                       Length : 10

[132h 0306   1]      Proximity Domain Low(8) : 04
[133h 0307   1]                      Apic ID : 40
[134h 0308   4]        Flags (decoded below) : 00000001
                                     Enabled : 1
[138h 0312   1]              Local Sapic EID : 00
[139h 0313   3]    Proximity Domain High(24) : 000000
[13Ch 0316   4]                 Clock Domain : 00000000

[140h 0320   1]                Subtable Type : 00 [Processor Local APIC/SAPIC Affinity]
[141h 0321   1]                       Length : 10

[142h 0322   1]      Proximity Domain Low(8) : 04
[143h 0323   1]                      Apic ID : 41
[144h 0324   4]        Flags (decoded below) : 00000001
                                     Enabled : 1
[148h 0328   1]              Local Sapic EID : 00
[149h 0329   3]    Proximity Domain High(24) : 000000
[14Ch 0332   4]                 Clock Domain : 00000000

[150h 0336   1]                Subtable Type : 00 [Processor Local APIC/SAPIC Affinity]
[151h 0337   1]                       Length : 10

[152h 0338   1]      Proximity Domain Low(8) : 04
[153h 0339   1]                      Apic ID : 48
[154h 0340   4]        Flags (decoded below) : 00000001
                                     Enabled : 1
[158h 0344   1]              Local Sapic EID : 00
[159h 0345   3]    Proximity Domain High(24) : 000000
[15Ch 0348   4]                 Clock Domain : 00000000

[160h 0352   1]                Subtable Type : 00 [Processor Local APIC/SAPIC Affinity]
[161h 0353   1]                       Length : 10

[162h 0354   1]      Proximity Domain Low(8) : 04
[163h 0355   1]                      Apic ID : 49
[164h 0356   4]        Flags (decoded below) : 00000001
                                     Enabled : 1
[168h 0360   1]              Local Sapic EID : 00
[169h 0361   3]    Proximity Domain High(24) : 000000
[16Ch 0364   4]                 Clock Domain : 00000000

[170h 0368   1]                Subtable Type : 00 [Processor Local APIC/SAPIC Affinity]
[171h 0369   1]                       Length : 10

[172h 0370   1]      Proximity Domain Low(8) : 05
[173h 0371   1]                      Apic ID : 50
[174h 0372   4]        Flags (decoded below) : 00000001
                                     Enabled : 1
[178h 0376   1]              Local Sapic EID : 00
[179h 0377   3]    Proximity Domain High(24) : 000000
[17Ch 0380   4]                 Clock Domain : 00000000

[180h 0384   1]                Subtable Type : 00 [Processor Local APIC/SAPIC Affinity]
[181h 0385   1]                       Length : 10

[182h 0386   1]      Proximity Domain Low(8) : 05
[183h 0387   1]                      Apic ID : 51
[184h 0388   4]        Flags (decoded below) : 00000001
                                     Enabled : 1
[188h 0392   1]              Local Sapic EID : 00
[189h 0393   3]    Proximity Domain High(24) : 000000
[18Ch 0396   4]                 Clock Domain : 00000000

[190h 0400   1]                Subtable Type : 00 [Processor Local APIC/SAPIC Affinity]
[191h 0401   1]                       Length : 10

[192h 0402   1]      Proximity Domain Low(8) : 05
[193h 0403   1]                      Apic ID : 58
[194h 0404   4]        Flags (decoded below) : 00000001
                                     Enabled : 1
[198h 0408   1]              Local Sapic EID : 00
[199h 0409   3]    Proximity Domain High(24) : 000000
[19Ch 0412   4]                 Clock Domain : 00000000

[1A0h 0416   1]                Subtable Type : 00 [Processor Local APIC/SAPIC Affinity]
[1A1h 0417   1]                       Length : 10

[1A2h 0418   1]      Proximity Domain Low(8) : 05
[1A3h 0419   1]                      Apic ID : 59
[1A4h 0420   4]        Flags (decoded below) : 00000001
                                     Enabled : 1
[1A8h 0424   1]              Local Sapic EID : 00
[1A9h 0425   3]    Proximity Domain High(24) : 000000
[1ACh 0428   4]                 Clock Domain : 00000000

[1B0h 0432   1]                Subtable Type : 00 [Processor Local APIC/SAPIC Affinity]
[1B1h 0433   1]                       Length : 10

[1B2h 0434   1]      Proximity Domain Low(8) : 06
[1B3h 0435   1]                      Apic ID : 60
[1B4h 0436   4]        Flags (decoded below) : 00000001
                                     Enabled : 1
[1B8h 0440   1]              Local Sapic EID : 00
[1B9h 0441   3]    Proximity Domain High(24) : 000000
[1BCh 0444   4]                 Clock Domain : 00000000

[1C0h 0448   1]                Subtable Type : 00 [Processor Local APIC/SAPIC Affinity]
[1C1h 0449   1]                       Length : 10

[1C2h 0450   1]      Proximity Domain Low(8) : 06
[1C3h 0451   1]                      Apic ID : 61
[1C4h 0452   4]        Flags (decoded below) : 00000001
                                     Enabled : 1
[1C8h 0456   1]              Local Sapic EID : 00
[1C9h 0457   3]    Proximity Domain High(24) : 000000
[1CCh 0460   4]                 Clock Domain : 00000000

[1D0h 0464   1]                Subtable Type : 00 [Processor Local APIC/SAPIC Affinity]
[1D1h 0465   1]                       Length : 10

[1D2h 0466   1]      Proximity Domain Low(8) : 06
[1D3h 0467   1]                      Apic ID : 68
[1D4h 0468   4]        Flags (decoded below) : 00000001
                                     Enabled : 1
[1D8h 0472   1]              Local Sapic EID : 00
[1D9h 0473   3]    Proximity Domain High(24) : 000000
[1DCh 0476   4]                 Clock Domain : 00000000

[1E0h 0480   1]                Subtable Type : 00 [Processor Local APIC/SAPIC Affinity]
[1E1h 0481   1]                       Length : 10

[1E2h 0482   1]      Proximity Domain Low(8) : 06
[1E3h 0483   1]                      Apic ID : 69
[1E4h 0484   4]        Flags (decoded below) : 00000001
                                     Enabled : 1
[1E8h 0488   1]              Local Sapic EID : 00
[1E9h 0489   3]    Proximity Domain High(24) : 000000
[1ECh 0492   4]                 Clock Domain : 00000000

[1F0h 0496   1]                Subtable Type : 00 [Processor Local APIC/SAPIC Affinity]
[1F1h 0497   1]                       Length : 10

[1F2h 0498   1]      Proximity Domain Low(8) : 07
[1F3h 0499   1]                      Apic ID : 70
[1F4h 0500   4]        Flags (decoded below) : 00000001
                                     Enabled : 1
[1F8h 0504   1]              Local Sapic EID : 00
[1F9h 0505   3]    Proximity Domain High(24) : 000000
[1FCh 0508   4]                 Clock Domain : 00000000

[200h 0512   1]                Subtable Type : 00 [Processor Local APIC/SAPIC Affinity]
[201h 0513   1]                       Length : 10

[202h 0514   1]      Proximity Domain Low(8) : 07
[203h 0515   1]                      Apic ID : 71
[204h 0516   4]        Flags (decoded below) : 00000001
                                     Enabled : 1
[208h 0520   1]              Local Sapic EID : 00
[209h 0521   3]    Proximity Domain High(24) : 000000
[20Ch 0524   4]                 Clock Domain : 00000000

[210h 0528   1]                Subtable Type : 00 [Processor Local APIC/SAPIC Affinity]
[211h 0529   1]                       Length : 10

[212h 0530   1]      Proximity Domain Low(8) : 07
[213h 0531   1]                      Apic ID : 78
[214h 0532   4]        Flags (decoded below) : 00000001
                                     Enabled : 1
[218h 0536   1]              Local Sapic EID : 00
[219h 0537   3]    Proximity Domain High(24) : 000000
[21Ch 0540   4]                 Clock Domain : 00000000

[220h 0544   1]                Subtable Type : 00 [Processor Local APIC/SAPIC Affinity]
[221h 0545   1]                       Length : 10

[222h 0546   1]      Proximity Domain Low(8) : 07
[223h 0547   1]                      Apic ID : 79
[224h 0548   4]        Flags (decoded below) : 00000001
                                     Enabled : 1
[228h 0552   1]              Local Sapic EID : 00
[229h 0553   3]    Proximity Domain High(24) : 000000
[22Ch 0556   4]                 Clock Domain : 00000000

[230h 0560   1]                Subtable Type : 01 [Memory Affinity]
[231h 0561   1]                       Length : 28

[232h 0562   4]             Proximity Domain : 00000001
[236h 0566   2]                    Reserved1 : 0000
[238h 0568   8]                 Base Address : 0000000000000000
[240h 0576   8]               Address Length : 00000000000A0000
[248h 0584   4]                    Reserved2 : 00000000
[24Ch 0588   4]        Flags (decoded below) : 00000001
                                     Enabled : 1
                               Hot Pluggable : 0
                                Non-Volatile : 0
[250h 0592   8]                    Reserved3 : 0000000000000000

[258h 0600   1]                Subtable Type : 01 [Memory Affinity]
[259h 0601   1]                       Length : 28

[25Ah 0602   4]             Proximity Domain : 00000001
[25Eh 0606   2]                    Reserved1 : 0000
[260h 0608   8]                 Base Address : 0000000000100000
[268h 0616   8]               Address Length : 000000007FF00000
[270h 0624   4]                    Reserved2 : 00000000
[274h 0628   4]        Flags (decoded below) : 00000001
                                     Enabled : 1
                               Hot Pluggable : 0
                                Non-Volatile : 0
[278h 0632   8]                    Reserved3 : 0000000000000000

[280h 0640   1]                Subtable Type : 01 [Memory Affinity]
[281h 0641   1]                       Length : 28

[282h 0642   4]             Proximity Domain : 00000001
[286h 0646   2]                    Reserved1 : 0000
[288h 0648   8]                 Base Address : 0000000100000000
[290h 0656   8]               Address Length : 0000000380000000
[298h 0664   4]                    Reserved2 : 00000000
[29Ch 0668   4]        Flags (decoded below) : 00000001
                                     Enabled : 1
                               Hot Pluggable : 0
                                Non-Volatile : 0
[2A0h 0672   8]                    Reserved3 : 0000000000000000

[2A8h 0680   1]                Subtable Type : 01 [Memory Affinity]
[2A9h 0681   1]                       Length : 28

[2AAh 0682   4]             Proximity Domain : 00000005
[2AEh 0686   2]                    Reserved1 : 0000
[2B0h 0688   8]                 Base Address : 0000000480000000
[2B8h 0696   8]               Address Length : 0000000400000000
[2C0h 0704   4]                    Reserved2 : 00000000
[2C4h 0708   4]        Flags (decoded below) : 00000001
                                     Enabled : 1
                               Hot Pluggable : 0
                                Non-Volatile : 0
[2C8h 0712   8]                    Reserved3 : 0000000000000000

Raw Table Data: Length 720 (0x2D0)

  0000: 53 52 41 54 D0 02 00 00 03 39 44 45 4C 4C 20 20  // SRAT.....9DELL  
  0010: 50 45 5F 53 43 33 20 20 01 00 00 00 41 4D 44 20  // PE_SC3  ....AMD 
  0020: 01 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00  // ................
  0030: 00 10 00 00 01 00 00 00 00 00 00 00 00 00 00 00  // ................
  0040: 00 10 00 01 01 00 00 00 00 00 00 00 00 00 00 00  // ................
  0050: 00 10 00 08 01 00 00 00 00 00 00 00 00 00 00 00  // ................
  0060: 00 10 00 09 01 00 00 00 00 00 00 00 00 00 00 00  // ................
  0070: 00 10 01 10 01 00 00 00 00 00 00 00 00 00 00 00  // ................
  0080: 00 10 01 11 01 00 00 00 00 00 00 00 00 00 00 00  // ................
  0090: 00 10 01 18 01 00 00 00 00 00 00 00 00 00 00 00  // ................
  00A0: 00 10 01 19 01 00 00 00 00 00 00 00 00 00 00 00  // ................
  00B0: 00 10 02 20 01 00 00 00 00 00 00 00 00 00 00 00  // ... ............
  00C0: 00 10 02 21 01 00 00 00 00 00 00 00 00 00 00 00  // ...!............
  00D0: 00 10 02 28 01 00 00 00 00 00 00 00 00 00 00 00  // ...(............
  00E0: 00 10 02 29 01 00 00 00 00 00 00 00 00 00 00 00  // ...)............
  00F0: 00 10 03 30 01 00 00 00 00 00 00 00 00 00 00 00  // ...0............
  0100: 00 10 03 31 01 00 00 00 00 00 00 00 00 00 00 00  // ...1............
  0110: 00 10 03 38 01 00 00 00 00 00 00 00 00 00 00 00  // ...8............
  0120: 00 10 03 39 01 00 00 00 00 00 00 00 00 00 00 00  // ...9............
  0130: 00 10 04 40 01 00 00 00 00 00 00 00 00 00 00 00  // ...@............
  0140: 00 10 04 41 01 00 00 00 00 00 00 00 00 00 00 00  // ...A............
  0150: 00 10 04 48 01 00 00 00 00 00 00 00 00 00 00 00  // ...H............
  0160: 00 10 04 49 01 00 00 00 00 00 00 00 00 00 00 00  // ...I............
  0170: 00 10 05 50 01 00 00 00 00 00 00 00 00 00 00 00  // ...P............
  0180: 00 10 05 51 01 00 00 00 00 00 00 00 00 00 00 00  // ...Q............
  0190: 00 10 05 58 01 00 00 00 00 00 00 00 00 00 00 00  // ...X............
  01A0: 00 10 05 59 01 00 00 00 00 00 00 00 00 00 00 00  // ...Y............
  01B0: 00 10 06 60 01 00 00 00 00 00 00 00 00 00 00 00  // ...`............
  01C0: 00 10 06 61 01 00 00 00 00 00 00 00 00 00 00 00  // ...a............
  01D0: 00 10 06 68 01 00 00 00 00 00 00 00 00 00 00 00  // ...h............
  01E0: 00 10 06 69 01 00 00 00 00 00 00 00 00 00 00 00  // ...i............
  01F0: 00 10 07 70 01 00 00 00 00 00 00 00 00 00 00 00  // ...p............
  0200: 00 10 07 71 01 00 00 00 00 00 00 00 00 00 00 00  // ...q............
  0210: 00 10 07 78 01 00 00 00 00 00 00 00 00 00 00 00  // ...x............
  0220: 00 10 07 79 01 00 00 00 00 00 00 00 00 00 00 00  // ...y............
  0230: 01 28 01 00 00 00 00 00 00 00 00 00 00 00 00 00  // .(..............
  0240: 00 00 0A 00 00 00 00 00 00 00 00 00 01 00 00 00  // ................
  0250: 00 00 00 00 00 00 00 00 01 28 01 00 00 00 00 00  // .........(......
  0260: 00 00 10 00 00 00 00 00 00 00 F0 7F 00 00 00 00  // ................
  0270: 00 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00  // ................
  0280: 01 28 01 00 00 00 00 00 00 00 00 00 01 00 00 00  // .(..............
  0290: 00 00 00 80 03 00 00 00 00 00 00 00 01 00 00 00  // ................
  02A0: 00 00 00 00 00 00 00 00 01 28 05 00 00 00 00 00  // .........(......
  02B0: 00 00 00 80 04 00 00 00 00 00 00 00 04 00 00 00  // ................
  02C0: 00 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00  // ................

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