title: What is the latency and throughput of the RDRAND instruction on Ivy Bridge?
body: <p>I cannot find any info on <a href="http://www.agner.org/optimize/#manuals" rel="noreferrer">agner.org</a> on the latency or throughput of the <a href="http://en.wikipedia.org/wiki/RdRand" rel="noreferrer">RDRAND</a> instruction. However, this processor exists, so the information must be out there.</p>
  
  <p>Edit: Actually the newest optimization manual mentions this instruction.  It is documented as &lt;200 cycles, and a total bandwidth of at least 500MB/s on Ivy Bridge.  But some more in-depth statistics on this instruction would be great since the latency and throughput is variable.</p>