[Bug 1868028] Re: L2\L3 cache display error for using "getconf -a" command"

[Taihsiang Ho]

I tested the command on bionic (ubuntu-mate) and it returns:

GNU_LIBPTHREAD_VERSION             NPTL 2.27
POSIX2_SYMLINKS                    1
LEVEL1_ICACHE_SIZE                 32768
LEVEL1_ICACHE_ASSOC                8
LEVEL1_ICACHE_LINESIZE             64
LEVEL1_DCACHE_SIZE                 32768
LEVEL1_DCACHE_ASSOC                8
LEVEL1_DCACHE_LINESIZE             64
LEVEL2_CACHE_SIZE                  262144
LEVEL2_CACHE_ASSOC                 4
LEVEL2_CACHE_LINESIZE              64
LEVEL3_CACHE_SIZE                  6291456
LEVEL3_CACHE_ASSOC                 12
LEVEL3_CACHE_LINESIZE              64
LEVEL4_CACHE_SIZE                  0
LEVEL4_CACHE_ASSOC                 0
LEVEL4_CACHE_LINESIZE              0


and

$ lscpu
Architecture:        x86_64
CPU op-mode(s):      32-bit, 64-bit
Byte Order:          Little Endian
CPU(s):              8
On-line CPU(s) list: 0-7
Thread(s) per core:  2
Core(s) per socket:  4
Socket(s):           1
NUMA node(s):        1
Vendor ID:           GenuineIntel
CPU family:          6
Model:               142
Model name:          Intel(R) Core(TM) i5-8265U CPU @ 1.60GHz
Stepping:            11
CPU MHz:             800.013
CPU max MHz:         3900.0000
CPU min MHz:         400.0000
BogoMIPS:            3600.00
Virtualization:      VT-x
L1d cache:           32K
L1i cache:           32K
L2 cache:            256K
L3 cache:            6144K
NUMA node0 CPU(s):   0-7

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https://bugs.launchpad.net/bugs/1868028

Title:
  L2\L3 cache display  error for using "getconf -a" command"

Status in kunpeng920:
  New
Status in kunpeng920 ubuntu-18.04 series:
  New
Status in kunpeng920 ubuntu-18.04-hwe series:
  New
Status in kunpeng920 ubuntu-18.10 series:
  New
Status in kunpeng920 ubuntu-20.04 series:
  New
Status in kunpeng920 upstream-kernel series:
  New
Status in glibc package in Ubuntu:
  New

Bug description:
  [Bug Description]
  L2\L3 cache display  error for using "getconf -a" command"

  [Steps to Reproduce]
  1)uname -a 
  2)getconf -a

  
  [Actual Results]
  getconf -a
  GNU_LIBPTHREAD_VERSION             NPTL 2.27
  POSIX2_SYMLINKS                    1
  LEVEL1_ICACHE_SIZE                 0
  LEVEL1_ICACHE_ASSOC                0
  LEVEL1_ICACHE_LINESIZE             64
  LEVEL1_DCACHE_SIZE                 0
  LEVEL1_DCACHE_ASSOC                0
  LEVEL1_DCACHE_LINESIZE             64
  LEVEL2_CACHE_SIZE                  0
  LEVEL2_CACHE_ASSOC                 0
  LEVEL2_CACHE_LINESIZE              0
  LEVEL3_CACHE_SIZE                  0
  LEVEL3_CACHE_ASSOC                 0
  LEVEL3_CACHE_LINESIZE              0
  LEVEL4_CACHE_SIZE                  0
  LEVEL4_CACHE_ASSOC                 0
  LEVEL4_CACHE_LINESIZE              0

  
  [Expected Results]
  lscpu
  CPU max MHz:         2600.0000
  CPU min MHz:         200.0000
  BogoMIPS:            200.00
  L1d cache:           64K
  L1i cache:           64K
  L2 cache:            512K
  L3 cache:            65536K
  NUMA node0 CPU(s):   0-31

  
  [Reproducibility]

  [Additional information]
  (Firmware version, kernel version, affected hardware, etc. if required):

  [Resolution]

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