Bright Side of News reports Facebook is far from impressed by the performance of Intel's and AMD's latest server processors. Jonathan Heiliger, Vice President of Technical Operations on Facebook, says they aren't seeing the performance gains that the CPU makers are touting in the press:
In a 14 minute interview, Jonathan stated that "the biggest thing… was less-than-anticipated performance gains from new micro-architectures, so new CPUs from guys like Intel and AMD. The performance gains they're touting in the press, we're not seeing in our applications."
Just like that, the bomb was dropped on the rosy statements coming from AMD and Intel. While we do not know how the Facebook code works and what type of applications are they running, it looks like guys from Facebook hit either Amdahl's Law or we have a case where the CPU cannot get or crunch enough data.