[PATCH] Increase timeout for tests and syntax-check

[Pavel Hrdina]

On Fri, Jan 29, 2021 at 09:30:24AM -0300, Daniel Henrique Barboza wrote:
> 
> 
> On 1/27/21 2:59 PM, Michal Privoznik wrote:
> > Since we've switched to meson our tests run with a timeout (meson
> > uses 30 seconds as the default). However, not every machine that
> > builds libvirt is fast enough to run every test under 30 seconds
> > (each test binary has its own timeout, but still). For instance
> > when building a package for distro on a farm that's under load.
> > Or on a generally slow ARM hardware. While each developer can
> > tune their command line for building by adding
> > --timeout-multiplier=10, this is hard to do for aforementioned
> > build farms.
> > 
> > It's time to admit that not everybody has the latest, top shelf
> > CPU and increase the timeout.
> > 
> > Signed-off-by: Michal Privoznik <mprivozn at redhat.com>
> > ---
> 
> This sure will help these build farms environments, but what about the cases
> where an actual timeout means that there is something wrong with the code?
> E.g. commits 46d88d8dba56 and 2ba0b7497ce7 were only possible because I was
> seeing tests timing out in Power hosts when the 30 sec timeout was being
> enforced.
> 
> A 120 second default timeout for the majority of the test cases is a long time.
> virschematest in this laptop I use takes 2.5 sec to complete. If I do something
> wrong in the code and now the test is now 4 times slower (10 sec) I will not be
> able to detect it (I'll need to start keeping track or something). You'll have to
> run the test suit on your RasPi 2B to see that something went wrong because the
> timeout is better tuned to your RasPI than this laptop, but then the code is already
> upstream.
> 
> And the tests will get more complex and will naturally take longer to complete.
> Eventually this timeout might no be enough. Increase the timeout again?
> 
> Meson 0.57 has support for disabling test timeout entirely with --timeout-multiplier=0,
> disabling test timeout entirely. Can't we bump the meson version to 0.57 and
> then tell the distros to use timeout-multiplier=0? That will solve the problems
> for them, I keep the short timeouts for development, and we won't need to keep
> bumping the test timeout once every 2 years or something because the s390x
> TCG enviroment in Fedora COPR is timing out again.

Agreed. The timeout is useful and we can always find a machine where the
current timeout will not be good enough. I don't think it is a good idea
to increase the timeout like this for only few specific use-cases.

Bumping meson version to 0.57 just only for this tiny nice to have
feature is not something we should do. It would make building libvirt
unnecessary complicated for most contributors not using latest
bleeding-edge software. For example meson 0.57 is not even in
Fedora Rawhide, Gentoo, Archlinux and possibly on most of the similar
distributions.

Pavel
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 833 bytes
Desc: not available
URL: <http://listman.redhat.com/archives/libvir-list/attachments/20210129/54f35890/attachment-0001.sig>