IBM launched its Power8 lineup of superscalar symmetric multiprocessors back in August 2013 at the Hot Chips conference, and the first systems became available in August 2014. The announcement was significant because it signaled the beginning of a continuing partnership between IBM and Nvidia to develop GPU-accelerated IBM server systems, beginning with the Tesla K40 GPU.

The result was an HPC “tag-team” where IBM’s Power8 architecture, a 12-core chip with 96MB of embedded memory, would eventually go on to power Nvidia’s next-generation Pascal architecture which debuted in April 2016 at the company’s GPU Technology Conference.

NVLINK, first announced in March 2014, uses a proprietary High-Speed Signaling interconnect (NVHS) developed by Nvidia. The company says NVHS transmits data over a differential pair running at up to 20Gbps, so eight of these differential 20Gbps connections will form a 160Gbps “Sub-Link” that sends data in one direction. Two sub-links—one for each direction—will form a 320Gbps, or 40GB/s bi-directional “Link” that connects processors together in a mesh framework (GPU-to-GPU or GPU-to-CPU).

NVLINK lanes upgrade from 20Gbps to 25Gbps

IBM is projecting its Power9 servers to be available beginning in the middle of 2017, with PCWorld reporting that the new processor lineup will include support for NVLINK 2.0 technology. Each NVLINK lane will communicate at 25Gbps, up from 20Gbps in the first iteration. With eight differential lanes, this translates to a 400Gbps (50GB/s) bi-directional link between CPUs and GPUs, or about 25 percent more performance if the information is correct.

NVLINK 2.0 capable servers arriving next year

Meanwhile, Nvidia has yet to release any NVLINK 2.0-capable GPUs, but a company presentation slide in Korean language suggests that the technology will first appear in Volta GPUs which are also scheduled for release sometime next year. We were originally under the impression that the new GPU architecture would release in 2018, as per Nvidia’s roadmap. But a source hinted last month that Volta would be getting 16nm FinFET treatment and may show up in roughly the same timeframe as AMD’s HBM 2.0-powered Vega sometime in 2017. After all, it is easier for Nvidia to launch sooner if the new architecture is built on the same node as the Pascal lineup.

Still ahead of PCI-Express 4.0

Nvidia claims that PCI-Express 3.0 (32GB/s with x16 bandwidth) significantly limits a GPU’s ability to access a CPU’s memory system and is about “four to five times slower” than its proprietary standard. Even PCI-Express 4.0, releasing later in 2017, is limited to 64GB/s on a slot with x16 bandwidth.

To put this in perspective, Nvidia’s Tesla P100 Accelerator uses four 40GB/s NVLINK ports to connect clusters of GPUs and CPUs, for a total of 160GB/s of bandwidth.

With a generational NVLINK upgrade from 40GB/s to 50GB/s bi-directional links, the company could release a future Volta-based GPU with four 50GB/s NVLINK ports totaling of 200GB/s of bandwidth, well above and beyond the specifications of the new PCI-Express standard.

Courtesy-Fud

The company will acquire Israel-based EZSource, it said, in the hopes of helping developers “quickly and easily understand and change mainframe code.”

EZSource offers a visual dashboard that’s designed to ease the process of modernizing applications. Essentially, it exposes application programming interfaces (APIs) so that developers can focus their efforts accordingly.

Developers must often manually check thousands or millions of lines of code, but EZSource’s software instead alerts them to the number of sections of code that access a particular entity, such as a database table, so they can check them to see if updates are needed.

IBM’s purchase is expected to close in the second quarter of 2016. Terms of the deal were not disclosed.

Sixty-eight percent of the world’s production IT workloads run on mainframes, IBM said, amounting to roughly 30 billion business transactions processed each day.

“The mainframe is the backbone of today’s businesses,” said Ross Mauri, general manager for IBM z Systems. “As clients drive their digital transformation, they are seeking the innovation and business value from new applications while leveraging their existing assets and processes.”

EZSource will bring an important capability to the IBM ecosystem, said Patrick Moorhead, president and principal analyst with Moor Insights & Strategy.

“While IBM takes advantage of a legacy architecture with z Systems, it’s important that the software modernizes, and that’s exactly what EZSource does,” Moorhead said.

Large organizations still run a lot of mainframe systems, particularly within the financial-services sector, noted analyst Frank Scavo, president of Computer Economics.

“As these organizations roll out new mobile, social and other digital business experiences, they have no choice but to expose these mainframe systems via APIs,” Scavo said.

But in many large organizations, skilled mainframe developers are in short supply — especially those who really understand these legacy systems, he added.

“Anything to increase the productivity of these developers will go a long way to ensuring the success of their digital business initiatives,” Scavo said. “Automation tools to discover, expose and analyze the inner workings of these legacy apps are really needed.”

It’s a smart move for IBM, he added.

Source- http://www.thegurureview.net/computing-category/looking-to-transform-mainframe-business-ibm-acquires-ezsource.html