The article
"CXL™ Memory Form-Factor Comparison," authored by Timothy Pezarro and
Torry Steed, explores the demand for innovative memory solutions to meet the
requirements of modern applications, including AI and machine learning. The
authors introduce the Compute Express Link™ (CXL™) standard and delve into Type
3 Memory modules, focusing on emerging form factors like EDSFF and AIC. The
article compares EDSFF, offering smaller form factors with reduced capacity and
power consumption, and AIC, which boasts larger capacities and power
requirements but requires internal installation. In conclusion, the article
highlights the adaptability of these form factors for CXL devices, enabling
seamless integration into existing computer systems without the need for
extensive redesign. This balancing of size and capacity caters to the demands
of contemporary computer systems.
Echoing this
article, H3 strives to ensure the compatibility of their composable CXL memory
pooling solution with various CXL modules, trying to approach the levels of
their direct-attached performances. H3's overarching strategy revolves around
prioritizing universal applicability. H3 aims to ensure that the CXL switch
system can seamlessly accommodate different CXL modules, regardless of their
specific type, to embrace the diversity of CXL modules available in the market.
Moreover, H3's CXL memory expansion box mainly adheres to the NVMe standard
form factor, ensuring alignment with established industry standards. It not
only guarantees compatibility but also streamlines integration with existing
systems.
At present, H3
actively engages in testing CXL memory modules available in the market,
particularly those with E3.S and AIC form factors. These tests involve
partnerships with prominent manufacturers, including Smart Modular (Microchip
Technology), Samsung (Montage Technology), and Intel for Emerald Rapid and
Granite Rapid CPUs. These collaborations aim to enhance their understanding of
compatibility and performance. For instance, H3 has conducted memory
performance tests on the Samsung CXL memory expander, providing valuable
statistics below as a comparison baseline. These partnerships underline H3's
commitment to fostering strong industry relationships within the ecosystem.
Based on the
provided data, the 1:1 Reads-Writes bandwidth test result with one thread
(25,722.37 MB/s) is close to the ideal theoretical value of 32 GB/s for an x8 link. It
indicates good bandwidth performance. The switch-attached latency measurement
of 591 ns compared to the direct-attached test result is described as
"ordinary" and suggests that there is room for improvement in terms
of reducing latency. Lower latency is generally desirable in high-performance
computing and data transfer applications. Therefore, further system development
and optimization efforts are recommended to enhance overall performance.
In summary, H3's
strategy emphasizes compatibility through extensive testing of CXL modules,
validating their recognition and data alignment with original specifications.
This approach establishes a critical benchmark for future testing, especially
in switch-attached modules, enhancing overall compatibility and performance. H3
also works hard to improve performance to meet evolving market demands, all
while nurturing valuable industry partnerships.
References:
Pezarro, Timothy,
and Torry Steed. " CXL™ Memory Form-Factor Comparison: Examination of
Form-Factors for this Growing Standard.", CXL Consortium, Sep. 5, 2023, https://www.computeexpresslink.org/post/cxl-memory-form-factor-comparison-examination-of-form-factors-for-this-growing-standard?fbclid=IwAR22rsTtO31eeyLBY8Mkq1aujlHts_lw3LHjfXHvfgReUFDyH3Bb9JBsDO4.
