Posts by

Josh Simons

Josh Simons

With over 20 years of experience in High Performance Computing, Josh currently leads an effort within VMware's Office of the CTO to bring the full value of virtualization to HPC. Previously, he was a Distinguished Engineer at Sun Microsystems with broad responsibilities for HPC direction and strategy. He joined Sun
With over 20 years of experience in High Performance Computing, Josh currently leads an effort within VMware's Office of the CTO to bring the full value of virtualization to HPC. Previously, he was a Distinguished Engineer at Sun Microsystems with broad responsibilities for HPC direction and strategy. He joined Sun in 1996 from Thinking Machines Corporation, a pioneering company in the area of Massively Parallel Processors (MPPs), where he held a variety of technical positions. Josh has worked on developer tools for distributed parallel computing, including language and compiler design, scalable parallel debugger design and development, and MPI. He has also worked in the areas of 3D graphics, image processing, and realtime device control. Josh has an undergraduate degree in Engineering from Harvard College and a Masters in Computer Science from Harvard University. He has served as a member of the OpenMP ARB Board of Directors since 2002 and is currently serving as Chairman of the Board.
Three Extreme Performance Talks from the Office of the CTO at VMworld USA

The Office of the CTO will be presenting three talks in the unofficial “Extreme Performance” series at the upcoming VMworld 2017 conference in Las Vegas. In addition, one of these talks will be delivered at VMworld Europe in Barcelona. Each of these talks focuses on important aspects of pushing the envelope to achieve high performance […]

How to Enable Compute Accelerators on vSphere 6.5 for Machine Learning and Other HPC Workloads

As our CTO Ray O’Farrell recently mentioned, VMware is committed to helping customers build intelligent infrastructure, which includes the ability to take advantage of Machine Learning within their private and hybrid cloud environments. As part of delivering this vision, the Office of the CTO collaborates with customers and with VMware R&D teams to ensure the […]

Creative Calculations: VMware RADIO 2017 MathWall Results

Josh Simons and Na Zhang At the recent RADIO conference, engineers were challenged to create mathematical expressions for each number from 1 to 100 using only the digits in ‘1998’ (the year VMware was founded) combined with mathematical operators of their choice. What follows is the summary of the event that was shared with attendees. […]

High Performance Computing with Altitude: SC’16 Begins Tomorrow!

As readers may know, VMware has had a presence in the EMC booth for the last several years at Supercomputing, the HPC community’s largest annual ACM/IEEE¬†conference and exhibition. With the fusion of Dell and EMC into DellEMC and with VMware now under the Dell Technologies umbrella, I am very pleased that we will have two […]

Performance of RDMA and HPC Applications in VMs using FDR InfiniBand on VMware vSphere

Customers often ask whether InfiniBand (IB) can be used with vSphere. The short answer is, yes. VM Direct Path I/O (passthrough) allows InfiniBand cards to be made directly visible within a virtual machine so the guest operating system can directly access the device. With this approach, no ESX-specific driver is required — just the hardware […]

Virtualized HPC at Johns Hopkins Applied Physics Laboratory

Johns Hopkins University Applied Physics Laboratory¬†(JHUAPL) has deployed a virtualized HPC solution on vSphere to run Monte Carlo simulations for the US Air Force. The idea was conceived and implemented by Edmond DeMattia at JHUAPL, and has been presented by Edmond and his colleague Michael Chinn at two VMworld conferences. We now have a white […]

GPGPU Computing with the nVidia K80 on VMware vSphere 6

[UPDATE: Feb, 2017: This blog entry has been updated to correct an error. To use advanced features like passthrough of large-BAR PCI devices, you must use a UEFI-enabled VM and guest OS.]   As customer interest in running HPC workloads on vSphere continues to increase, I’ve been receiving more questions about whether compute accelerators like […]