Bug#1142815: libipc-shareable-perl: autopkgtest uses insane amount of memory on loong64

[gregor herrmann]

On Sun, 26 Jul 2026 17:30:48 +0200, Paul Gevers wrote:

>I was looking into why one of the loong64 host of ci.d.n was showing a 
>spike is swap (we have 1.8 TB, it was used all) and loss of 
>debci-workers and the culprit seems to be src:libipc-shareable-perl. I 
>ran
>"""
>/usr/bin/autopkgtest --no-built-binaries  --timeout=30600 
>--needs-internet=skip --timeout-install=9999 --user debci 
>--apt-upgrade libipc-shareable-perl -- lxc --sudo --name elbrus 
>autopkgtest-unstable-loong64
>"""
>manually on the host and killed it once top reported 70% memory use by 
>perl (of the 127 GB). Swap plummeted from 74 GB to 10 GB.

Hrm, annoying.

>I guess this means there's a memory leak somewhere on loong64. 
>Otherwise, can you please limit the test to a reasonable memory 
>footprint?

On amd64 I behaves somewhat sanely, although it also uses lots of 
shared memory.

I have a suspicion which test causes this problem, but that's more 
guessing.

Did you have a chance to see in top, which process/test was the 
culprit?

Also there's a new upstream release, but that's more of a rewrite 
and I don't dare to guess if it changes the problem. Maybe we should 
just try, but I don't want to kill the poor loong64 CI hosts …


Cheers,
gregor

-- 
  .''`.  https://info.comodo.priv.at -- Debian Developer https://www.debian.org
  : :' : OpenPGP fingerprint D1E1 316E 93A7 60A8 104D  85FA BB3A 6801 8649 AA06
  `. `'  Member VIBE!AT & SPI Inc. -- Supporter Free Software Foundation Europe
    `-   
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 963 bytes
Desc: Digital Signature
URL: <http://alioth-lists.debian.net/pipermail/pkg-perl-maintainers/attachments/20260807/c7b6dc5a/attachment-0001.sig>