BaseTools: Enable MAX_CONCURRENT_THREAD_NUMBER = 0 feature

when set 'MAX_CONCURRENT_THREAD_NUMBER=0',  will auto-detect number of
processor threads as MAX_CONCURRENT_THREAD_NUMBER.

Fixes: https://bugzilla.tianocore.org/show_bug.cgi?id=775
Cc: Liming Gao <liming.gao@intel.com>
Cc: Yonghong Zhu <yonghong.zhu@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Yunhua Feng <yunhuax.feng@intel.com>
Reviewed-by: Yonghong Zhu <yonghong.zhu@intel.com>

1 files changed, 6 insertions, 2 deletions

diff --git a/BaseTools/Source/Python/build/build.py b/BaseTools/Source/Python/build/build.py
index 38498046d7..de19756d99 100644
--- a/BaseTools/Source/Python/build/build.py
+++ b/BaseTools/Source/Python/build/build.py
@@ -2,7 +2,7 @@
 # build a platform or a module

 #

 #  Copyright (c) 2014, Hewlett-Packard Development Company, L.P.<BR>

-#  Copyright (c) 2007 - 2017, Intel Corporation. All rights reserved.<BR>

+#  Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>

 #

 #  This program and the accompanying materials

 #  are licensed and made available under the terms and conditions of the BSD License

@@ -26,6 +26,7 @@ import platform
 import traceback

 import encodings.ascii

 import itertools

+import multiprocessing

 

 from struct import *

 from threading import *

@@ -936,7 +937,10 @@ class Build():
                 self.ThreadNumber = int(self.ThreadNumber, 0)

 

         if self.ThreadNumber == 0:

-            self.ThreadNumber = 1

+            try:

+                self.ThreadNumber = multiprocessing.cpu_count()

+            except (ImportError, NotImplementedError):

+                self.ThreadNumber = 1

 

         if not self.PlatformFile:

             PlatformFile = self.TargetTxt.TargetTxtDictionary[DataType.TAB_TAT_DEFINES_ACTIVE_PLATFORM]