Re: [Qemu-devel] [PATCH v2 12/21] travis: build using all available cores

["Alex Bennée" <alex.bennee@linaro.org>]

Philippe Mathieu-Daudé <f4bug@amsat.org> writes:

> Few improvement as of today, but if Travis release their limit on the opensource
> plan or upgrade their hardware, new builds will get some benefit.
>
> Restrict to as most 4 cores to respect Travis Open Source plan.

You need to mention you are also enabling a parallel make check here.

>
> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
> ---
>  .travis.yml | 15 ++++++++++++---
>  1 file changed, 12 insertions(+), 3 deletions(-)
>
> diff --git a/.travis.yml b/.travis.yml
> index 777914f759..a7512f3ab0 100644
> --- a/.travis.yml
> +++ b/.travis.yml
> @@ -62,7 +62,14 @@ notifications:
>      on_failure: always
>  env:
>    global:
> -    - TEST_CMD="make check"
> +    # jobs
> +      # detects cores on the hosting hardware, rather than the VM (https://docs.travis-ci.com/user/languages/c#hints)
> +    - VM_CORES="4" HW_CORES="$(getconf _NPROCESSORS_ONLN)"
> +      # be kind with Travis free plan, restrict to at most 4 cores
> +    - PARALLEL_JOBS="$(($(test ${HW_CORES} -gt ${VM_CORES} && echo ${VM_CORES} || echo ${HW_CORES}) + 1))"
> +    - HOMEBREW_MAKE_JOBS="${PARALLEL_JOBS}"
> +    # tests
> +    - TEST_CMD="make -j${PARALLEL_JOBS} check"
>    matrix:
>      - CONFIG=""
>      - CONFIG="--enable-debug --enable-debug-tcg --enable-trace-backends=log"
> @@ -78,9 +85,11 @@ before_install:
>    - if [ "$TRAVIS_OS_NAME" == "osx" ]; then brew install libffi gettext glib pixman ; fi
>    - git submodule update --init --recursive
>  before_script:
> +  - echo "Using ${PARALLEL_JOBS} parallel jobs"
>    - ./configure ${CONFIG}
>  script:
> -  - make -j3 && ${TEST_CMD}
> +  - make -j${PARALLEL_JOBS}
> +  - ${TEST_CMD}
>  matrix:
>    include:
>      # Test with CLang for compile portability
> @@ -234,7 +243,7 @@ matrix:
>        group: edge
>        env:
>          - COVERITY=1
> -        - COVERITY_BUILD_CMD="make -j3"
> +        - COVERITY_BUILD_CMD="make -j${PARALLEL_JOBS}"
>          - COVERITY_EMAIL=peter.maydell@linaro.org
>          # This 'secure' setting sets COVERITY_TOKEN=<secret token>
>          # and was created with travis encrypt -r qemu/qemu COVERITY_TOKEN=...


--
Alex Bennée