commit 1369150868b5f5618bdba92b8f91f6650f082b70
author ilevy@chromium.org <ilevy@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98> Tue Oct 16 04:26:37 2012 +0000
committer ilevy@chromium.org <ilevy@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98> Tue Oct 16 04:26:37 2012 +0000
tree 46ba4599939eda2fb4ef83bf81fe780d1df2e410
parent b531354fef8113f0862a65aeeb6ce9fd7a276a89

Make gclient sync use cpu count for default jobs

- On high core, fast machines, jobs=8 is does not offer good
  parallelization.  Switch to use number of local cpus.

R=maruel@chromium.org
BUG=


Review URL: https://chromiumcodereview.appspot.com/11140019

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@162072 0039d316-1c4b-4281-b951-d872f2087c98

gclient_utils.py

diff --git a/gclient_utils.py b/gclient_utils.py
index ab45d28..78fa722 100644
--- a/gclient_utils.py
+++ b/gclient_utils.py
@@ -769,3 +769,17 @@
   fix_url('CODE_REVIEW_SERVER')
   fix_url('VIEW_VC')
   return keyvals
+
+
+def NumLocalCpus():
+  """Returns the number of processors.
+
+  Python on OSX 10.6 raises a NotImplementedError exception.
+  """
+  try:
+    import multiprocessing
+    return multiprocessing.cpu_count()
+  except:  # pylint: disable=W0702
+    # Mac OS 10.6 only
+    # pylint: disable=E1101
+    return int(os.sysconf('SC_NPROCESSORS_ONLN'))