SK hynix Introduces CXL Optimization for Enhanced Linux Performance


September 24, 2024 by our News Team

SK hynix's Heterogeneous Memory Software Development Kit (HMSDK) is now available on Linux, offering a potential industry standard for optimizing memory bandwidth and performance for AI systems, blurring the lines between hardware and software.

  • Availability of HMSDK on Linux opens up opportunities for developers to optimize their memory bandwidth without changing their existing applications.
  • Integrating HMSDK with Linux showcases SK hynix's commitment to software as a competitive edge, positioning them at the intersection of hardware and software.
  • HMSDK promises a performance boost of over 12% by relocating frequently accessed data to faster memory, crucial for applications that rely on quick data retrieval.


In a move that could reshape the landscape of memory technology, SK hynix Inc. has just announced that its Heterogeneous Memory Software Development Kit (HMSDK) is now available on Linux. For those not steeped in the tech world, Linux is the largest open-source operating system out there, powering everything from smartphones to supercomputers. So, why does this matter?

Well, HMSDK is SK hynix’s proprietary software designed to optimize the operation of Compute Express Link (CXL), a technology that’s been gaining traction as a game-changer in the realm of AI memory. Think of CXL as a superhighway for data, allowing processors to access memory more efficiently. Alongside High Bandwidth Memory (HBM), it’s being touted as a next-generation solution for the demands of AI systems, which require lightning-fast data processing.

What’s particularly interesting here is how SK hynix is positioning itself at the intersection of hardware and software. The company has already built a reputation for its high-performance memory solutions, like HBM, but integrating HMSDK with Linux is a bold step that underscores its commitment to software as a competitive edge.

Imagine being a developer working on Linux—now you have access to a toolkit that can enhance your memory bandwidth by over 30% without the need to change your existing applications. It’s like getting a turbo boost for your car without having to swap out the engine. This is achieved through smart memory allocation that optimizes data flow between traditional memory and the expanded CXL memory.

But it doesn’t stop there. The software also promises a performance bump of more than 12% over conventional systems by relocating frequently accessed data to faster memory. This is particularly crucial for applications that rely heavily on quick data retrieval—think AI models that process massive datasets in real time.

The semiconductor industry is buzzing with anticipation as CXL gears up for full commercialization in the latter half of 2024, coinciding with the rollout of the first server CPUs featuring the “CXL 2.0” specification. SK hynix is already in the trenches, validating CXL 2.0 memory in capacities of 96 GB and 128 GB with its customers, with plans for mass production by year’s end.

In a recent statement, Youngpyo Joo, the Head of Software Solution at SK hynix, emphasized the need for a holistic approach in advancing AI systems. “For the development and spread of AI systems such as large language models (LLMs), it is now necessary to significantly improve not only semiconductors but also the level of system applications to support them,” he noted. This perspective highlights a crucial point: as the tech landscape evolves, so too must the tools and technologies that underpin it.

So, what does this mean for the future? With SK hynix’s HMSDK becoming a potential industry standard for CXL memory on Linux, developers around the globe will have an invaluable resource at their fingertips. It’s a step towards a more collaborative ecosystem in next-generation memory technologies, and it could pave the way for innovations we can’t even imagine yet.

As we move forward into this new era of AI and memory technology, one thing is clear: the lines between hardware and software are blurring, and companies like SK hynix are right at the forefront, ready to lead the charge.

SK hynix Introduces CXL Optimization for Enhanced Linux Performance

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Background Information


About SK hynix: SK Hynix is a prominent South Korean semiconductor company known for its innovative contributions to the global technology landscape. Specializing in the production of memory solutions, SK Hynix has played a vital role in shaping the semiconductor industry. With a commitment to research and development, they have continuously pushed the boundaries of memory technology, resulting in cutting-edge products that power various devices and applications.

SK hynix website  SK hynix LinkedIn



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