<story><title>Erlang and IBM Power8 in the cloud: super-high single-system parallelism</title><url>http://erlang.org/pipermail/erlang-questions/2014-October/081407.html</url></story><parent_chain></parent_chain><comment><author>jacques_chester</author><text>For those as confused as I was at first, the critical line is &amp;quot;total time&amp;quot;. 2.8s for the P8 vs 38.7s for the x86.&lt;p&gt;Otherwise the x86 comes out looking a lot better -- lower 95th percentile, lower max, lower average.&lt;p&gt;(Modulo usual complaints about benchmark porn: single run, lack of standard deviation, unknown configuration differences etc etc).</text></comment>
<story><title>Erlang and IBM Power8 in the cloud: super-high single-system parallelism</title><url>http://erlang.org/pipermail/erlang-questions/2014-October/081407.html</url></story><parent_chain></parent_chain><comment><author>throwaway_yy2Di</author><text>How does POWER8 compare to x86, e.g. Haswell? Just skimming some of the architecture details...&lt;p&gt;* 4x hardware threads per core (8-way SMT vs. 2)&lt;p&gt;* 1&amp;#x2F;4th FP throughput per core (8 SP flops&amp;#x2F;cycle vs. 32)&lt;p&gt;* 3x bandwidth to RAM (230 GB&amp;#x2F;s vs. 68) [edit: updated for Haswell-EP]&lt;p&gt;&lt;a href=&quot;https://en.wikipedia.org/wiki/POWER8#Specifications&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;en.wikipedia.org&amp;#x2F;wiki&amp;#x2F;POWER8#Specifications&lt;/a&gt;&lt;p&gt;&lt;a href=&quot;http://www.redbooks.ibm.com/abstracts/tips1153.html&quot; rel=&quot;nofollow&quot;&gt;http:&amp;#x2F;&amp;#x2F;www.redbooks.ibm.com&amp;#x2F;abstracts&amp;#x2F;tips1153.html&lt;/a&gt;&lt;p&gt;What is it good for?</text></comment>