Re: [PATCH 0/1] sched/topology: NUMA distance deduplication
On Thu, Mar 18, 2021 at 12:42 AM Sergei Trofimovich <slyfox@gentoo.org> wrote:
> > > On 3/17/21 8:36 PM, Valentin Schneider wrote:
> > >> I see ACPI in your boot logs, so I'm guessing you have a bogus SLIT table
> > >> (the ACPI table with node distances). You should be able to double check
> > >> this with something like:
> > >>
> > >> $ acpidump > acpi.dump
> > >> $ acpixtract -a acpi.dump
> > >> $ iasl -d *.dat
> > >> $ cat slit.dsl
> > >
> >
>
> Looking at 'arch/ia64/**' NUMA presence is detected by SRAT ACPI
> tables (and generic ACPI also wants SLIT, those probably exist on large
> ia64 boxes?)
hardware is HPE Integrity BL870c i4 nPar, debian sid/unstable ia64
installed (one of the buildd(s) of debian-ports):
mator@lifshitz:~/acpi$ cat slit.dsl
/*
* Intel ACPI Component Architecture
* AML/ASL+ Disassembler version 20200925 (64-bit version)
* Copyright (c) 2000 - 2020 Intel Corporation
*
* Disassembly of slit.dat, Wed Mar 17 21:52:16 2021
*
* ACPI Data Table [SLIT]
*
* Format: [HexOffset DecimalOffset ByteLength] FieldName : FieldValue
*/
[000h 0000 4] Signature : "SLIT" [System
Locality Information Table]
[004h 0004 4] Table Length : 0000003C
[008h 0008 1] Revision : 01
[009h 0009 1] Checksum : 7B
[00Ah 0010 6] Oem ID : "HP "
[010h 0016 8] Oem Table ID : "BL860C-4"
[018h 0024 4] Oem Revision : 00000001
[01Ch 0028 4] Asl Compiler ID : "HP "
[020h 0032 4] Asl Compiler Revision : 00000001
[024h 0036 8] Localities : 0000000000000004
[02Ch 0044 4] Locality 0 : 0A FF 14 FF
[030h 0048 4] Locality 1 : FF 0A FF FF
[034h 0052 4] Locality 2 : 14 FF 0A FF
[038h 0056 4] Locality 3 : FF FF FF 0A
Raw Table Data: Length 60 (0x3C)
0000: 53 4C 49 54 3C 00 00 00 01 7B 48 50 20 20 20 20 // SLIT<....{HP
0010: 42 4C 38 36 30 43 2D 34 01 00 00 00 48 50 20 20 // BL860C-4....HP
0020: 01 00 00 00 04 00 00 00 00 00 00 00 0A FF 14 FF // ................
0030: FF 0A FF FF 14 FF 0A FF FF FF FF 0A // ............
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