<div dir="ltr">Hi Nico,<div><br></div><div>Can you give more backstory for this change? Was it just a single machine failing?</div><div><br></div><div>Takumi, do you know any more details about this? Do you override it on your bots?</div><div><br></div><div>-- Sean Silva</div><div><br></div><div><br><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Dec 22, 2015 at 3:12 PM, Nico Weber via llvm-commits <span dir="ltr"><<a href="mailto:llvm-commits@lists.llvm.org" target="_blank">llvm-commits@lists.llvm.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Author: nico<br>
Date: Tue Dec 22 17:12:00 2015<br>
New Revision: 256291<br>
<br>
URL: <a href="http://llvm.org/viewvc/llvm-project?rev=256291&view=rev" rel="noreferrer" target="_blank">http://llvm.org/viewvc/llvm-project?rev=256291&view=rev</a><br>
Log:<br>
lit: Limit number of processes on Windows to 32.<br>
<br>
Modified:<br>
    llvm/trunk/utils/lit/lit/util.py<br>
<br>
Modified: llvm/trunk/utils/lit/lit/util.py<br>
URL: <a href="http://llvm.org/viewvc/llvm-project/llvm/trunk/utils/lit/lit/util.py?rev=256291&r1=256290&r2=256291&view=diff" rel="noreferrer" target="_blank">http://llvm.org/viewvc/llvm-project/llvm/trunk/utils/lit/lit/util.py?rev=256291&r1=256290&r2=256291&view=diff</a><br>
==============================================================================<br>
--- llvm/trunk/utils/lit/lit/util.py (original)<br>
+++ llvm/trunk/utils/lit/lit/util.py Tue Dec 22 17:12:00 2015<br>
@@ -39,7 +39,9 @@ def detectCPUs():<br>
     if "NUMBER_OF_PROCESSORS" in os.environ:<br>
         ncpus = int(os.environ["NUMBER_OF_PROCESSORS"])<br>
         if ncpus > 0:<br>
-            return ncpus<br>
+            # With more than 32 processes, process creation often fails with<br>
+            # "Too many open files".  FIXME: Check if there's a better fix.<br>
+            return min(ncpus, 32)<br>
     return 1 # Default<br>
<br>
 def mkdir_p(path):<br>
<br>
<br>
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</blockquote></div><br></div></div></div>