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Machine learning for safety-critical functions? Kalray says yes

Machine learning for safety-critical functions? Kalray says yes

Interviews |
By Christoph Hammerschmidt



eeNews Europe: What makes your architecture different from other multicore approaches?

Stéphane Cordova: The high computing performance makes our manycore architecture particularly suited for real-time applications where the results need to be provided within a predictable time span. This is the case in some data center applications, but also in the first place in embedded systems with stringent requirements such as autonomous vehicles.

eeNews: Safety-critical systems must meet the stringent requirements of ISO 26262 which, among others, mandate deterministic behavior in terms of timing. However, machine learning and determinism do not go well together.

Cordova: True, determinism and machine learning are difficult to reconcile. But one does not have to have very sophisticated machine learning algorithms for basic safety. The point is redundancy. And, by the way, there is already a new safety standard under discussion that will be put in place in autonomous cars on top of the ISO 26262 requirements – it is called SOTIF – “Safety of The Intended Functionality”. This standard will take these aspects into account.

eeNews Europe: What makes your architecture different from those of established market players, such as Nvidia?

Cordova: Along to the massive parallel approach, we also use on-chip memory. Thus, all relevant data are located in close proximity to the compute units. This eliminates long data paths with long signal propagation delays and losses of clock cycles. The entire neural network resides on chip. In the data exchange between processors and memory – all on-chip – we have data transfer bandwidths of 600 gigabytes per second.


Competing architectures rely on external memory – for every memory access they need to go outside the chip.Thus, for them, memory access takes much more time. In addition, we have extra coprocessors dedicated to machine learning. This combination yields very high performance and very low power consumption at the same time. Another factor is that our competitors have a big legacy – installed base, ecosystem, and existing software – that prevents them from quick changes. Rewriting these applications would be a nightmare.

eeNews Europe: As a startup-company, you may have the advantage of being more agile and flexible, but the products of your competitors are probably more mature.

Cordova: We have ten years of experience; our products are now in the third generation. Our products are mature enough to go into cars within the next years. Our processor is based on our own patented core design. In terms of software, they are programmed in standard C++; existing applications can be ported to our architecture almost for free.

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