Re: [PATCH] travis-ci: run previously failed tests first, then slowest to fastest

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On Tue, Jan 19, 2016 at 03:00:52PM -0800, Junio C Hamano wrote:
> Jeff King <peff@xxxxxxxx> writes:
> 
> > On Tue, Jan 19, 2016 at 10:24:29AM +0100, larsxschneider@xxxxxxxxx wrote:
> >
> >> From: Lars Schneider <larsxschneider@xxxxxxxxx>
> >> 
> >> Use the Travis-CI cache feature to store prove test results and make them
> >> available in subsequent builds. This allows to run previously failed tests
> >> first and run remaining tests in slowest to fastest order. As a result it
> >> is less likely that Travis-CI needs to wait for a single test at the end
> >> which speeds up the test suite execution by ~2 min.
> >
> > Thanks, this makes sense, and the patch looks good.
> >
> >> @@ -18,7 +22,7 @@ env:
> >>      - P4_VERSION="15.2"
> >>      - GIT_LFS_VERSION="1.1.0"
> >>      - DEFAULT_TEST_TARGET=prove
> >> -    - GIT_PROVE_OPTS="--timer --jobs 3"
> >> +    - GIT_PROVE_OPTS="--timer --jobs 3 --state=failed,slow,save"
> >
> > Have you tried bumping --jobs here? I usually use "16" on my local box.
> 
> I think 3 comes from this:
> 
>   http://thread.gmane.org/gmane.comp.version-control.git/279348/focus=279674

Having recently looked into this, the relevant travis-ci documentation
is:
https://docs.travis-ci.com/user/ci-environment/

which says all environments have 2 cores, so you won't get much from
anything higher than -j3.

The following document also says something slightly different:
https://docs.travis-ci.com/user/speeding-up-the-build#Parallelizing-your-build-on-one-VM

"Travis CI VMs run on 1.5 virtual cores."

> > I also looked into the Travis "container" thing. It's not clear to me
> > from their page:
> >
> >   https://docs.travis-ci.com/user/workers/container-based-infrastructure/
> >
> > whether we're using the new, faster container infrastructure or not.
> > ...
> > depends on when Travis "recognized" the repo, but I'm not quite sure
> > what that means. Should we be adding "sudo: false" to the top-level of
> > the yaml file?
> 
> In an earlier discussion
> 
>   http://thread.gmane.org/gmane.comp.version-control.git/279348/focus=279495
> 
> I found that we were not eligible for container-based sandbox as the
> version of travis-yaml back then used "sudo".  I do not seem to find
> the use of sudo in the recent one we have in my tree, so it would be
> beneficial if somebody interested in Travis CI look into this.

The https://docs.travis-ci.com/user/ci-environment/ document says the
default is "sudo: false" for repositories enabled in 2015 or later, which
I assume is the case for the git repository. "sudo: required" is the
default for repositories enabled before 2015.

Mike
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