On Wed, Jun 10, 2020 at 01:33:01PM +0200, Andrea Bolognani wrote: > Right now we're dividing the jobs into three stages: prebuild, which > includes DCO checking as well as building artifacts such as the > website, and native_build/cross_build, which do exactly what you'd > expect based on their names. > > This organization is nice from the logical point of view, but results > in poor utilization of the available CI resources: in particular, the > fact that cross_build jobs can only start after all native_build jobs > have finished means that if even a single one of the latter takes a > bit longer the pipeline will stall, and with native builds taking > anywhere from less than 10 minutes to more than 20, this happens all > the time. > > Building artifacts in a separate pipeline stage also doesn't have any > advantages, and only delays further stages by a couple of minutes. > The only job that really makes sense in its own stage is the DCO > check, because it's extremely fast (less than 1 minute) and, if that > fails, we can avoid kicking off all other jobs. > > Reducing the number of stages results in significant speedups: > specifically, going from three stages to two stages reduces the > overall completion time for a full CI pipeline from ~45 minutes[1] > to ~30 minutes[2]. > > [1] https://gitlab.com/abologna/libvirt/-/pipelines/154751893 > [2] https://gitlab.com/abologna/libvirt/-/pipelines/154771173 > > Signed-off-by: Andrea Bolognani <abologna@xxxxxxxxxx> > --- > .gitlab-ci.yml | 19 +++++++++---------- > 1 file changed, 9 insertions(+), 10 deletions(-) Reviewed-by: Daniel P. Berrangé <berrange@xxxxxxxxxx> Regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|
