[llvm] r222341 - Use ninja pools to limit the number of concurrent compile/link jobs.

[Rafael Espíndola]

This is quiet handy for doing LTO builds in machines with limited ram :-)

On 19 November 2014 at 05:30, Evgeniy Stepanov
<eugeni.stepanov at gmail.com> wrote:
> Author: eugenis
> Date: Wed Nov 19 04:30:02 2014
> New Revision: 222341
>
> URL: http://llvm.org/viewvc/llvm-project?rev=222341&view=rev
> Log:
> Use ninja pools to limit the number of concurrent compile/link jobs.
>
> This change makes use of the new "job pool" capability in cmake 3.0
> with ninja generator to allow limiting the number of concurrent jobs
> of a certain type.
>
> Modified:
>     llvm/trunk/CMakeLists.txt
>     llvm/trunk/docs/CMake.rst
>
> Modified: llvm/trunk/CMakeLists.txt
> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/CMakeLists.txt?rev=222341&r1=222340&r2=222341&view=diff
> ==============================================================================
> --- llvm/trunk/CMakeLists.txt (original)
> +++ llvm/trunk/CMakeLists.txt Wed Nov 19 04:30:02 2014
> @@ -24,6 +24,21 @@ endif()
>
>  project(LLVM)
>
> +# The following only works with the Ninja generator in CMake >= 3.0.
> +set(LLVM_PARALLEL_COMPILE_JOBS "" CACHE STRING
> +  "Define the maximum number of concurrent compilation jobs.")
> +if(LLVM_PARALLEL_COMPILE_JOBS)
> +  set_property(GLOBAL APPEND PROPERTY JOB_POOLS compile_job_pool=${LLVM_PARALLEL_COMPILE_JOBS})
> +  set(CMAKE_JOB_POOL_COMPILE compile_job_pool)
> +endif()
> +
> +set(LLVM_PARALLEL_LINK_JOBS "" CACHE STRING
> +  "Define the maximum number of concurrent link jobs.")
> +if(LLVM_PARALLEL_LINK_JOBS)
> +  set_property(GLOBAL APPEND PROPERTY JOB_POOLS link_job_pool=${LLVM_PARALLEL_LINK_JOBS})
> +  set(CMAKE_JOB_POOL_LINK link_job_pool)
> +endif()
> +
>  # Add path for custom modules
>  set(CMAKE_MODULE_PATH
>    ${CMAKE_MODULE_PATH}
>
> Modified: llvm/trunk/docs/CMake.rst
> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/docs/CMake.rst?rev=222341&r1=222340&r2=222341&view=diff
> ==============================================================================
> --- llvm/trunk/docs/CMake.rst (original)
> +++ llvm/trunk/docs/CMake.rst Wed Nov 19 04:30:02 2014
> @@ -291,6 +291,12 @@ LLVM-specific variables
>    are ``Address``, ``Memory``, ``MemoryWithOrigins`` and ``Undefined``.
>    Defaults to empty string.
>
> +**LLVM_PARALLEL_COMPILE_JOBS**:STRING
> +  Define the maximum number of concurrent compilation jobs.
> +
> +**LLVM_PARALLEL_LINK_JOBS**:STRING
> +  Define the maximum number of concurrent link jobs.
> +
>  **LLVM_BUILD_DOCS**:BOOL
>    Enables all enabled documentation targets (i.e. Doxgyen and Sphinx targets) to
>    be built as part of the normal build. If the ``install`` target is run then
>
>
> _______________________________________________
> llvm-commits mailing list
> llvm-commits at cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvm-commits