Background — High Performance Attached Processors Handicapped By Architecture
The application of high-performance accelerators, notably GPUs, GPGPUs (APUs in AMD terminology) to a variety of computing problems has blossomed over the last decade, resulting in ever more affordable compute power for both horizon and mundane problems, along with growing revenue streams for a growing industry ecosystem. Adding heat to an already active mix, Intel’s Xeon Phi accelerators, the most recent addition to the GPU ecosystem, have the potential to speed adoption even further due to hoped-for synergies generated by the immense universe of x86 code that could potentially run on the Xeon Phi cores.
However, despite any potential synergies, GPUs (I will use this term generically to refer to all forms of these attached accelerators as they currently exist in the market) suffer from a fundamental architectural problem — they are very distant, in terms of latency, from the main scalar system memory and are not part of the coherent memory domain. This in turn has major impacts on performance, cost, design of the GPUs, and the structure of the algorithms:
Performance — The latency for memory accesses generally dictated by PCIe latencies, which while much improved over previous generations, are a factor of 100 or more longer than latency from coherent cache or local scalar CPU memory. While clever design and programming, such as overlapping and buffering multiple transfers can hide the latency in a series of transfers, it is difficult to hide the latency for an initial block of data. Even AMD’s integrated APUs, in which the GPU elements are on a common die, do not share a common memory space, and explicit transfers are made in and out of the APU memory.
The industry is abuzz with speculation that IBM will sell its x86 server business to Lenovo. As usual, neither party is talking publicly, but at this point I’d give it a better than even chance, since usually these kind of rumors tend to be based on leaks of real discussions as opposed to being completely delusional fantasies. Usually.
So the obvious question then becomes “Huh?”, or, slightly more eloquently stated, “Why would they do something like that?”. Aside from the possibility that this might all be fantasy, two explanations come to mind:
1. IBM is crazy.
2. IBM is not crazy.
Of the two explanations, I’ll have to lean toward the latter, although we might be dealing with a bit of the “Hey, I’m the new CEO and I’m going to do something really dramatic today” syndrome. IBM sold its PC business to Lenovo to the tune of popular disbelief and dire predictions, and it's doing very well today because it transferred its investments and focus to higher margin business, like servers and services. Lenovo makes low-end servers today that it bootstrapped with IBM licensed technology, and IBM is finding it very hard to compete with Lenovo and other low-cost providers. Maybe the margins on its commodity server business have sunk below some critical internal benchmark for return on investment, and it believes that it can get a better return on its money elsewhere.
HP today announced the Moonshot 1500 server, their first official volume product in the Project Moonshot server product family (the initial Redstone, a Calxeda ARM-based server, was only available in limited quantities as a development system), and it represents both a significant product today and a major stake in the ground for future products, both from HP and eventually from competitors. It’s initial attractions – an extreme density low power x86 server platform for a variety of low-to-midrange CPU workloads – hides the fact that it is probably a blueprint for both a family of future products from HP as well as similar products from other vendors.
Geek Stuff – What was Announced
The Moonshot 1500 is a 4.3U enclosure that can contain up to 45 plug-in server cartridges, each one a complete server node with a dual-core Intel Atom 1200 CPU, up to 8 GB of memory and a single disk or SSD device, up to 1 TB, and the servers share common power supplies and cooling. But beyond the density, the real attraction of the MS1500 is its scalable fabric and CPU-agnostic architecture. Embedded in the chassis are multiple fabrics for storage, management and network giving the MS1500 (my acronym, not an official HP label) some of the advantages of a blade server without the advanced management capabilities. At initial shipment, only the network and management fabric will be enabled by the system firmware, with each chassis having up two Gb Ethernet switches (technically they can be configured with one, but nobody will do so), allowing the 45 servers to share uplinks to the enterprise network.
With the next major spin of Intel server CPUs due later this year, HP’s customers have been waiting for HP’s next iteration of its core c-Class BladeSystem, which has been on the market for almost 7 years without any major changes to its basic architecture. IBM made a major enhancement to its BladeCenter architecture, replacing it with the new Pure Systems, and Cisco’s offering is new enough that it should last for at least another three years without a major architectural refresh, leaving HP customers to wonder when HP was going to introduce its next blade enclosure, and whether it would be compatible with current products.
At their partner conference this week, HP announced a range of enhancements to its blade product line that on combination represent a strong evolution of the current product while maintaining compatibility with current investments. This positioning is similar to what IBM did with its BladeCenter to BladeCenter-H upgrade, preserving current customer investment and extending the life of the current server and peripheral modules for several more years.
Tech Stuff – What Was Announced
Among the goodies announced on February 19 was an assortment of performance and functionality enhancements, including:
Platinum enclosure — The centerpiece of the announcement was the new c7000 Platinum enclosure, which boosts the speed of the midplane signal paths from 10 GHz to 14GHz, for an increase of 40% in raw bandwidth of the critical midplane, across which all of the enclosure I/O travels. In addition to the increased bandwidth midplane, the new enclosure incorporates location aware sensors and also doubles the available storage bandwidth.
Today’s announcements at the Open Compute Project (OCP) 2013 Summit could be considered as tangible markers for the OCP crossing the line into real relevance as an important influence on emerging hyper-scale and cloud computing as well as having a potential bleed-through into the world of enterprise data centers and computing. This is obviously a subjective viewpoint – there is no objective standard for relevance, only post-facto recognition that something was important or not. But in this case I’m going to stick my neck out and predict that OCP will have some influence and will be a sticky presence in the industry for many years.
Even if their specs (which look generally quite good) do not get picked up verbatim, they will act as an influence on major vendors who will, much like the auto industry in the 1970s, get the message that there is a market for economical “low-frills” alternatives.
Major OCP Initiatives
To date, OCP has announced a number of useful hardware specifications, including:
With a couple of months' perspective, I’m pretty convinced that Intel has made a potentially disruptive entry in the market for programmable computational accelerators, often referred to as GPGPUs (General Purpose Graphics Processing Units) in deference to the fact that the market leaders, NVIDIA and AMD, have dominated the segment with parallel computational units derived from high-end GPUs. In late 2012, Intel, referring to the architecture as MIC (Many Independent Cores) introduced the Xeon Phi product, the long-awaited productization of the development project that was known internally (and to the rest of the world as well) as Knight’s Ferry, a MIC coprocessor with up to 62 modified Xeon cores implemented in its latest 22 nm process.
On Tuesday November 8, after more than a year of pre-announcement disclosures that eventually left very little to the imagination, Intel finally announced the Itanium 9500, formerly known as Poulson. Added to this was the big surprise of HP announcing a refresh of its current line of Integrity servers, from blades to the large Superdome servers, with the new Itanium 9500.
As noted in an earlier post, the Itanium 9500 offers considerable performance improvements over its predecessors, and instantiated in HP’s new Integrity line it is positioned as delivering between 2X and 3X the performance per socket as previous Itanium 9300 (Tukwilla) systems at approximately the same price. For those remaining committed to Itanium and its attendant OS platforms, notably HP-UX, this is unmitigated good news. The fly in the ointment (I have never seen a fly in any ointment, but it does sound gross), of course, is HP’s dispute with Oracle. Despite the initial judgment in HP’s favor, the trial is a) not over yet, and b) Oracle has already filed for an early appeal of the initial verdict, which would ordinarily have to wait until the second phase of the trial, scheduled for next year, to finish. The net takeaway is that Oracle’s future availability on Itanium and HP-UX is not yet assured, so we really cannot advise the large number of Oracle users who will require Oracle 12 and later versions to relax yet.
Earlier this week, in conjunction with ARM Holdings plc’s announcement of the upcoming Cortex A53 and A57, full 64-bit CPU implementations based on the ARM V8 specification, AMD also announced that it would be designing and selling SOC (System On a Chip) products based on this technology in 2014, roughly coinciding with availability of 64-bit parts from ARM and other partners.
This is a major event in the ARM ecosystem. AMD, while much smaller than Intel, is still a multi-billion-dollar enterprise, and for the second largest vendor of x86 chips to also throw its hat into the ARM ecosystem and potentially compete with its own mainstream server and desktop CPU business is an aggressive move on the part of AMD management that carries some risk and much potential advantage.
Reduced to its essentials, what AMD announced (and in some cases hinted at):
Intention to produce A53/A57 SOC modules for multiple server segments. There was no formal statement of intentions regarding tablet/mobile devices, but it doesn’t take a rocket scientist to figure out that AMD wants a piece of this market, and ARM is a way to participate.
The announcement is wider that just the SOC silicon. AMD also hinted at making a range of IP, including its fabric architecture from the SeaMicro architecture, available in the form of “reusable IP blocks.” My interpretation is that it intends to make the fabric, reference architectures, and various SOCs available to its hardware system partners.
[For some reason this has been unpublished since April — so here it is well after AMD announced its next spin of the SeaMicro product.]
At its recent financial analyst day, AMD indicated that it intended to differentiate itself by creating products that were advantaged in niche markets, with specific mention, among other segments, of servers, and to generally shake up the trench warfare that has had it on the losing side of its lifelong battle with Intel (my interpretation, not AMD management’s words). Today, at least for the server side of the business, it made a move that can potentially offer it visibility and differentiation by acquiring innovative server startup SeaMicro.
SeaMicro has attracted our attention since its appearance (blog post 1, blog post 2) with its innovative architecture that dramatically reduces power and improves density by sharing components like I/O adapters, disks, and even BIOS over a proprietary fabric. The irony here is that SeaMicro came to market with a tight alignment with Intel, who at one point even introduced a special dual-core packaging of its Atom CPU to allow SeaMicro to improve its density and power efficiency. Most recently SeaMicro and Intel announced a new model that featured Xeon CPUs to address the more mainstream segments that were not a part of SeaMicro’s original Atom-based offering.
Every culture has its coming of age rituals — Confirmation, Bar Mitzvah, being hunted by tribal elders, surviving in the wilderness, driving at high speed while texting — all of which mark the progress from childhood to adulthood. In the high-tech world, one of the rituals marking the maturation of a company is the user group. When a company has a strategy it wants to communicate, a critical mass of customers, and prospects bright enough that it wants to highlight them rather than obscure them, it is time for a user group meeting.
This year, having passed a year since the acquisition of Novell by AttachMate and its subsequent instantiation as a standalone division, as well as being its 20th anniversary, SUSE had its first user group meeting. All in all, the portents were good, and SUSE got its core messages across to an audience of about 500 of its users as well as a cadre of the more sophisticated (IMHO) industry analysts.
Among My Key Takeaways:
SUSE is a stable company with rational management — With profitable revenues of over $200M and a publicly stated plan to hit $234 for the next fiscal year, SUSE is a reasonably sized company (technically a division of $1.3B Attachmate, but it looks and acts like an independent company), with growth rates that look to be a couple of points higher than its segment.
SUSE’s management has done an excellent job of focusing the company — SUSE, acknowledging its size disadvantage over competitor Red Hat, has chosen to focus heavily on enterprise Linux, publicly disavowing desktop and mobile device directions. SUSE’s claim is that their market share in the core enterprise segment is larger than their overall market share compared to Red Hat. This is a hard number to even begin to tweeze out, but it feels like a reasonable claim.