Automatically use more cores when the test build uses 'make'.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@162790 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/analyzer/SATestBuild.py b/utils/analyzer/SATestBuild.py
index 8f008f1..9c99d0d 100755
--- a/utils/analyzer/SATestBuild.py
+++ b/utils/analyzer/SATestBuild.py
@@ -42,6 +42,7 @@
import csv
import sys
import glob
+import math
import shutil
import time
import plistlib
@@ -51,6 +52,26 @@
# Helper functions.
#------------------------------------------------------------------------------
+def detectCPUs():
+ """
+ Detects the number of CPUs on a system. Cribbed from pp.
+ """
+ # Linux, Unix and MacOS:
+ if hasattr(os, "sysconf"):
+ if os.sysconf_names.has_key("SC_NPROCESSORS_ONLN"):
+ # Linux & Unix:
+ ncpus = os.sysconf("SC_NPROCESSORS_ONLN")
+ if isinstance(ncpus, int) and ncpus > 0:
+ return ncpus
+ else: # OSX:
+ return int(capture(['sysctl', '-n', 'hw.ncpu']))
+ # Windows:
+ if os.environ.has_key("NUMBER_OF_PROCESSORS"):
+ ncpus = int(os.environ["NUMBER_OF_PROCESSORS"])
+ if ncpus > 0:
+ return ncpus
+ return 1 # Default
+
def which(command, paths = None):
"""which(command, [paths]) - Look up the given command in the paths string
(or the PATH environment variable, if unspecified)."""
@@ -120,6 +141,9 @@
print "Error: cannot find 'clang' in PATH"
sys.exit(-1)
+# Number of jobs.
+Jobs = math.ceil(detectCPUs() * 0.75)
+
# Project map stores info about all the "registered" projects.
ProjectMapFile = "projectMap.csv"
@@ -186,6 +210,11 @@
SBCommandFile = open(BuildScriptPath, "r")
SBPrefix = "scan-build " + SBOptions + " "
for Command in SBCommandFile:
+ # If using 'make', auto imply a -jX argument
+ # to speed up analysis. xcodebuild will
+ # automatically use the maximum number of cores.
+ if Command.startsWith("make "):
+ Command += "-j" + Jobs
SBCommand = SBPrefix + Command
if Verbose == 1:
print " Executing: %s" % (SBCommand,)
