Author: mattip <matti.pi...@gmail.com>
Branch: 
Changeset: r82967:b2f40ec51e8b
Date: 2016-03-11 15:21 +0200
http://bitbucket.org/pypy/pypy/changeset/b2f40ec51e8b/

Log:    when running tests in parallel, restrict make to a single core

diff --git a/testrunner/runner.py b/testrunner/runner.py
--- a/testrunner/runner.py
+++ b/testrunner/runner.py
@@ -237,6 +237,11 @@
     N = run_param.parallel_runs
     if N > 1:
         out.write("running %d parallel test workers\n" % N)
+        s = 'setting'
+        if os.environ.get('MAKEFLAGS'):
+            s = 'overriding'
+        out.write("%s MAKEFLAGS to '-j1'\n" % s)
+        os.environ['MAKEFLAGS'] = '-j1'
     failure = False
 
     for testname in testdirs:
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