I first met Peter when he was the Xilinx rep. at a PREP meeting in the early 90's. Later I was privileged to work with him at Xilinx. Still later my son and his grandson attended the same gymnastics class for a time. As others have stated, Peter was a great guy, very approachable and always willing to help you out with a technical issue. This has been quite a year with Williams, Pease and now Alfke leaving the industry. All had very unique careers.
RIP Peter. I first knew Peter when I was a PhD student many many years ago and found him to be the most diligent person you could ever meet. For example, not only he would suggest a solution to a problem, he would ping me afterwards to find out whether it worked well or not. I subsequently met Peter face to face at conferences many time and found the same level of humility and dedication. Top man, and the world is a poorer place without him.
I had the honor to work with Peter over many, many years as a customer and an industry colleague. More than anyone else Peter embodied the excitement, technical excellence and sheer sense of wonder that is Xilinx at its best. I deeply feel his loss.