[pkg-lxc-devel] Bug#1036818: linux on armel/armhf: Perl library unable to access get CPU info from /proc/cpu or kstat

[Paul Gevers]

Hi,

On 29-05-2023 15:58, Mathias Gibbens wrote:
> On Mon, 2023-05-29 at 14:26 +0200, Pierre-Elliott Bécue wrote:
>> On Mon, 2023-05-29 at 07:37 +0200, Paul Gevers wrote:
>>> Is there more information I can get for you from one of the
>>> effected architectures?
> 
>    Can you grab /proc/cpuinfo from a physical CI host as well as from
> within a container for the armel, armhf, and arm64 architectures? That
> will let us see what difference(s) lxcfs is presenting and might give a
> clue for the root issue. Since only the 32bit arm architectures appear
> to be affected, I'm also curious to see what the arm64 cpuinfo is.

We have three layers here. The bare metal is arm64. It hosts several 
arm* QEMU VM. Inside the VM we run the lxc. I put the output of all 
three at the bottom. *Maybe* it's relevant that the bare metal still 
runs bullseye while the VM's run bookworm. I'll also share the content 
for an arm64 host (which is a VM where I don't have access to the bare 
metal.)

Paul

# The armhf VM
debian at ci-worker-armhf-01:~$ cat /proc/cpuinfo
processor       : 0
BogoMIPS        : 50.00
Features        : fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics 
fphp asimdhp cpuid asimdrdm lrcpc dcpop asimddp ssbs
CPU implementer : 0x41
CPU architecture: 8
CPU variant     : 0x3
CPU part        : 0xd0c
CPU revision    : 1

processor       : 1
BogoMIPS        : 50.00
Features        : fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics 
fphp asimdhp cpuid asimdrdm lrcpc dcpop asimddp ssbs
CPU implementer : 0x41
CPU architecture: 8
CPU variant     : 0x3
CPU part        : 0xd0c
CPU revision    : 1

[... repeat until ...]

processor       : 15
BogoMIPS        : 50.00
Features        : fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics 
fphp asimdhp cpuid asimdrdm lrcpc dcpop asimddp ssbs
CPU implementer : 0x41
CPU architecture: 8
CPU variant     : 0x3
CPU part        : 0xd0c
CPU revision    : 1

# generating the container and showing inside
debian at ci-worker-armhf-01:~$ sudo lxc-copy -N elbrus 
autopkgtest-unstable-armhf && sudo lxc-start elbrus && sudo lxc-attach 
elbrus
root at elbrus:/# cat /proc/cpuinfo
root at elbrus:/# ls -al /proc/cpuinfo
-r--r--r-- 1 root root 3878 May 29 17:48 /proc/cpuinfo

# the bare metal machine used for armhf and armel VM's
root at altra:~# cat /proc/cpuinfo
processor       : 0
BogoMIPS        : 50.00
Features        : fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics 
fphp asimdhp cpuid asimdrdm lrcpc dcpop asimddp ssbs
CPU implementer : 0x41
CPU architecture: 8
CPU variant     : 0x3
CPU part        : 0xd0c
CPU revision    : 1

processor       : 1
BogoMIPS        : 50.00
Features        : fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics 
fphp asimdhp cpuid asimdrdm lrcpc dcpop asimddp ssbs
CPU implementer : 0x41
CPU architecture: 8
CPU variant     : 0x3
CPU part        : 0xd0c
CPU revision    : 1

[.... repeat until ...]

processor       : 159
BogoMIPS        : 50.00
Features        : fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics 
fphp asimdhp cpuid asimdrdm lrcpc dcpop asimddp ssbs
CPU implementer : 0x41
CPU architecture: 8
CPU variant     : 0x3
CPU part        : 0xd0c
CPU revision    : 1


# the arm64 VM (at Huawei)
root at ci-worker-arm64-02:~# cat /proc/cpuinfo
processor       : 0
BogoMIPS        : 200.00
Features        : fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics 
fphp asimdhp cpuid asimdrdm jscvt fcma dcpop asimddp asimdfhm
CPU implementer : 0x48
CPU architecture: 8
CPU variant     : 0x1
CPU part        : 0xd01
CPU revision    : 0

processor       : 1
BogoMIPS        : 200.00
Features        : fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics 
fphp asimdhp cpuid asimdrdm jscvt fcma dcpop asimddp asimdfhm
CPU implementer : 0x48
CPU architecture: 8
CPU variant     : 0x1
CPU part        : 0xd01
CPU revision    : 0

processor       : 2
BogoMIPS        : 200.00
Features        : fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics 
fphp asimdhp cpuid asimdrdm jscvt fcma dcpop asimddp asimdfhm
CPU implementer : 0x48
CPU architecture: 8
CPU variant     : 0x1
CPU part        : 0xd01
CPU revision    : 0

processor       : 3
BogoMIPS        : 200.00
Features        : fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics 
fphp asimdhp cpuid asimdrdm jscvt fcma dcpop asimddp asimdfhm
CPU implementer : 0x48
CPU architecture: 8
CPU variant     : 0x1
CPU part        : 0xd01
CPU revision    : 0

root at ci-worker-arm64-02:~# lxc-copy autopkgtest-unstable-arm64 -N elbrus 
&& lxc-start elbrus && lxc-attach elbrus
root at elbrus:~# cat /proc/cpuinfo
processor       : 0
BogoMIPS        : 200.00
Features        : fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics 
fphp asimdhp cpuid asimdrdm jscvt fcma dcpop asimddp asimdfhm
CPU implementer : 0x48
CPU architecture: 8
CPU variant     : 0x1
CPU part        : 0xd01
CPU revision    : 0

processor       : 1
BogoMIPS        : 200.00
Features        : fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics 
fphp asimdhp cpuid asimdrdm jscvt fcma dcpop asimddp asimdfhm
CPU implementer : 0x48
CPU architecture: 8
CPU variant     : 0x1
CPU part        : 0xd01
CPU revision    : 0

processor       : 2
BogoMIPS        : 200.00
Features        : fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics 
fphp asimdhp cpuid asimdrdm jscvt fcma dcpop asimddp asimdfhm
CPU implementer : 0x48
CPU architecture: 8
CPU variant     : 0x1
CPU part        : 0xd01
CPU revision    : 0

processor       : 3
BogoMIPS        : 200.00
Features        : fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics 
fphp asimdhp cpuid asimdrdm jscvt fcma dcpop asimddp asimdfhm
CPU implementer : 0x48
CPU architecture: 8
CPU variant     : 0x1
CPU part        : 0xd01
CPU revision    : 0
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