Re: [PATCH] Platform/Intel: Dynamic NUMBER_OF_PROCESSORS in build.

["Nate DeSimone" <nathaniel.l.desimone@intel.com>]

Reviewed-by: Nate DeSimone <nathaniel.l.desimone@intel.com>

On 6/12/19, 11:17 PM, "Chiu, Chasel" <chasel.chiu@intel.com> wrote:

    REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1913
    
    To improve build performance by default the maximum
    processors should be used for building.
    To support this, NUMBER_OF_PROCESSORS in build.cfg has
    new definition:
      0 = AUTO. Maximum of processors will be used.
      non-zero = limit or force the number of processors.
    
    Test: tried several NUMBER_OF_PROCESSORS settings and
          the build parameter can be updated accordingly
          also builds successfully.
    
    Cc: Michael Kubacki <michael.a.kubacki@intel.com>
    Cc: Nate DeSimone <nathaniel.l.desimone@intel.com>
    Cc: Liming Gao <liming.gao@intel.com>
    Signed-off-by: Chasel Chiu <chasel.chiu@intel.com>
    ---
     Platform/Intel/build.cfg     | 2 +-
     Platform/Intel/build_bios.py | 8 +++++++-
     2 files changed, 8 insertions(+), 2 deletions(-)
    
    diff --git a/Platform/Intel/build.cfg b/Platform/Intel/build.cfg
    index 6c23e5eabc..fc6e4fe824 100644
    --- a/Platform/Intel/build.cfg
    +++ b/Platform/Intel/build.cfg
    @@ -46,7 +46,7 @@ FSP_TEST_RELEASE = FALSE
     SECURE_BOOT_ENABLE = FALSE
     REBUILD_MODE =
     BUILD_ROM_ONLY =
    -NUMBER_OF_PROCESSORS = 1
    +NUMBER_OF_PROCESSORS = 0
     
     
     [PLATFORMS]
    diff --git a/Platform/Intel/build_bios.py b/Platform/Intel/build_bios.py
    index 09eceddeff..864511ac4d 100644
    --- a/Platform/Intel/build_bios.py
    +++ b/Platform/Intel/build_bios.py
    @@ -21,6 +21,7 @@ import shutil
     import argparse
     import traceback
     import subprocess
    +import multiprocessing
     from importlib import import_module
     
     try:
    @@ -345,7 +346,12 @@ def build(config):
         print(" BUILD_ROM_ONLY = ", config.get("BUILD_ROM_ONLY"))
         print("==========================================")
     
    -    command = ["build", "-n", config["NUMBER_OF_PROCESSORS"]]
    +    NumberOfProcessors = config["NUMBER_OF_PROCESSORS"]
    +    if config["NUMBER_OF_PROCESSORS"] == "0":
    +        # 0 means AUTO, maximum number of processors will be set
    +        NumberOfProcessors = str(multiprocessing.cpu_count())
    +    print ("Number of processors set to " + NumberOfProcessors)
    +    command = ["build", "-n", NumberOfProcessors]
     
         if config["REBUILD_MODE"] and config["REBUILD_MODE"] != "":
             command.append(config["REBUILD_MODE"])
    -- 
    2.13.3.windows.1