Hi Taihsiang,
Thanks for reporting this bug.
This is an upstream deliberate change in output format of caches in lscpu.
They introduced the '--caches' option to provide individual/total sizes.
It affects other architectures as well, not just arm64; e.g., amd64.
For example, on my laptop:
Bionic:
$ lscpu | grep cache
L1d cache: 32K
L1i cache: 32K
L2 cache: 256K
L3 cache: 3072K
Focal:
$ lscpu | grep cache
L1d cache: 64 KiB
L1i cache: 64 KiB
L2 cache: 512 KiB
L3 cache: 3 MiB
On Eoan and later you can use `lscpu --caches` to get all/individual
cache information.
Focal:
$ lscpu --caches
NAME ONE-SIZE ALL-SIZE WAYS TYPE LEVEL
L1d 32K 64K 8 Data 1
L1i 32K 64K 8 Instruction 1
L2 256K 512K 4 Unified 2
L3 3M 3M 12 Unified 3
$ lscpu --caches=one-size
ONE-SIZE
32K
32K
256K
3M
For documentation purposes, this is the PR requesting/discussing it [1],
and this is the patch changing it [2].
Since this has been an upstream decision (see PR comments and patch), I
guess it's unlikely they'd change it back (even though it broke the
previous output convention, as that has been mentioned/acknowledged in
the PR.)
This patch has been introduced on 2.34, so Eoan and later have this
format change.
Hope this helps,
Mauricio
[1] https://github.com/karelzak/util-linux/issues/663
[2]
https://github.com/karelzak/util-linux/commit/e5f721132ec8b8c933a396d8dcb3efcb67854f13
** Bug watch added: github.com/karelzak/util-linux/issues #663
https://github.com/karelzak/util-linux/issues/663
** Changed in: util-linux (Ubuntu)
Status: New => Invalid
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https://bugs.launchpad.net/bugs/1873489
Title:
lscpu cache information is incorrect with focal on arm 64-bit platform
(ThunderX2)
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