I haven't filed a bug yet because I'm not sure what component to
assign this too.  I upgraded to Rawhide this morning and noticed that
some tests that previously ran OK are now timing out.  It turned out
that the tests were failing because a valgrinded executable runs much
more slowly in Rawhide today.

Here's my test:

Upgrade to Rawhide and install these additional packages:

  # dnf install libnbd nbdkit valgrind

Unpack the certificates from
http://oirase.annexia.org/tmp/rawhide-valgrind-bug/pki.tar.gz into /tmp

Run this command as NON-root (it's self-contained and just connects
the two commands together over localhost port 10809):

  $ time nbdkit --tls=require --tls-certificates=/tmp/pki null --run 'valgrind 
nbdinfo nbds://localhost'

For me this takes over 40 seconds in Rawhide, versus a couple of
seconds in Fedora 33/34.  Also if you remove "valgrind" it runs
instantaneously even in Rawhide.  If you run it as root, it runs
quickly again (WTF!)

The perf flamegraph seems to indicate it's doing a lot of stuff with
DWARF 3 symbols.

  http://oirase.annexia.org/tmp/rawhide-valgrind-bug/libnbd.svg

Uninstalling all relevant debuginfo packages didn't seem to help.

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
virt-top is 'top' for virtual machines.  Tiny program with many
powerful monitoring features, net stats, disk stats, logging, etc.
http://people.redhat.com/~rjones/virt-top
_______________________________________________
devel mailing list -- devel@lists.fedoraproject.org
To unsubscribe send an email to devel-le...@lists.fedoraproject.org
Fedora Code of Conduct: 
https://docs.fedoraproject.org/en-US/project/code-of-conduct/
List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
List Archives: 
https://lists.fedoraproject.org/archives/list/devel@lists.fedoraproject.org
Do not reply to spam on the list, report it: 
https://pagure.io/fedora-infrastructure

Reply via email to