<div dir="ltr">You could set PLT_SETUP_OPTIONS to &quot;-j &lt;N&gt;&quot;.<div><br></div><div>Robby</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Fri, Jul 5, 2013 at 11:07 AM, Sam Tobin-Hochstadt <span dir="ltr">&lt;<a href="mailto:samth@ccs.neu.edu" target="_blank">samth@ccs.neu.edu</a>&gt;</span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="im">On Fri, Jul 5, 2013 at 11:22 AM, Matthew Flatt &lt;<a href="mailto:mflatt@cs.utah.edu">mflatt@cs.utah.edu</a>&gt; wrote:<br>

&gt;<br>
&gt;&gt; * Similarly, that build shows that Racket detects itself as having<br>
&gt;&gt; many more CPUs than it actually has.<br>
&gt;<br>
&gt; On Linux, the processor count comes from sysconf(_SC_NPROCESSORS_ONLN).<br>
&gt; Should Racket use something else?<br>
<br>
</div>I talked to the Travis people, and it&#39;s just a limitation of the<br>
virtualization software they&#39;re using, that it reports the underlying<br>
hardware number.<br>
<br>
This suggests that maybe there should be a CPU=N argument to the<br>
top-level Makefile to control how many processors `raco setup` uses.<br>
Annoyingly, this can&#39;t be detected from the -j argument to `make` [1].<br>
<br>
Sam<br>
<br>
[1] <a href="http://stackoverflow.com/q/10898528/349661" target="_blank">http://stackoverflow.com/q/10898528/349661</a><br>
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