Latest posts about low-latency

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 […]

Running HPC Applications on vSphere using InfiniBand RDMA

Looking back on 2014, this was the year in which we made significant strides in assessing and addressing High Performance Computing (HPC) performance on vSphere. We’ve shown that throughput or task-parallel applications can be run  with only small or negligible performance degradations (usually well under 5%) when virtualized — a fact that the HPC community […]

High Performance Computing (HPC) Update

Our HPC effort at VMware has been very active in recent months, and we have lots of information to share– including new performance results. Rather than cramming all of that content into a single mega blog entry, I’ve decided instead to give a preview here of some of the most significant developments. I will then […]

Virtualized High Performance Computing (HPC) at VMworld 2013

It’s been a busy few months on the HPC front here at VMware. I’ve been spending increasing amounts of time answering questions from our field people and talking with customers about the benefits of using virtualization and cloud technologies for HPC workloads. The two hottest application areas are clearly Life Sciences and Electronic Design Automation […]

Paravirtual RDMA for Low Latency and Flexibility

The Office of the CTO has been exploring how to best enable application access to RDMA for those applications requiring the ultimate in high bandwidth, low-latency communication, which includes many HPC MPI applications as well as many scale-out databases and BigData approaches. Passthrough mode is the most straightforward way to enable guest-level RDMA. With passthrough […]

Summer of vRDMA

Last summer, Josh Simons wrote a blog entry titled Summer of RDMA, summarizing work done by our intern, Adit Ranadive, who looked at RDMA performance on ESXi using VM DirectPath I/O with QDR InfiniBand cards passed through to VMs. At the same time, I had been exploring how to exploit RDMA for accelerating ESXi hypervisor services […]

Tuning tips to run low-latency applications in virtual machines

First off, a little bit about myself. I’m Bhavesh Davda, presently a member of the Office of the CTO here at VMware, looking at areas like low latency applications, high rate packet processing, high performance computing, SR-IOV and RDMA, which have historically been challenging to virtualize. Until recently, I managed the vSphere Networking R&D team […]