SSD Hinting Mechanism for Dynamic Accelerator Resource Allocation
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Solution Overview
Problem
Solid State Drive (SSD) devices face challenges in efficiently allocating memory for accelerators, which are processors optimized for specific computations, leading to suboptimal performance due to inadequate dynamic resource management and access patterns.
Innovation Solution
The introduction of a hint mechanism between the storage controller and Non-Volatile Memory (NVM) allows accelerators to dynamically allocate resources, modify TRIM logic, and prioritize workloads based on data patterns and requirements, enabling burst mode operations and high-speed access by proactively managing data between QLC and SLC formats.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If accelerators are integrated into SSD devices to offload computational workload, then processing capability and productivity are improved, but device complexity and resource management difficulty increase
Solution Approach 1:
A storage control unit acts as an intermediary between accelerators and non-volatile memory, managing data transfer and resource allocation. The control unit receives hints from accelerators about data access patterns and proactively manages data movement between QLC and SLC memory formats, reducing the management burden on accelerators while improving processing efficiency
Solution Approach 2:
The system performs preliminary data movement operations based on hints from accelerators. When an accelerator indicates upcoming data access needs, the storage control unit proactively transfers data from QLC to SLC memory formats before the accelerator actually needs the data, reducing latency and improving overall processing capability
2Adaptability or versatility
If dynamic resource allocation is implemented for accelerators, then adaptability and throughput are improved, but access time and control complexity increase
Solution Approach 1:
The storage control unit receives hints from accelerators about future data access requirements and proactively transfers data between memory formats before actual access occurs. This preliminary action reduces the access time when the accelerator needs the data, while the hint mechanism enables dynamic adaptation to different workload requirements
Solution Approach 2:
Accelerators provide hints to the storage control unit about their data access patterns and requirements. The control unit uses this feedback to dynamically adjust resource allocation and data movement operations, optimizing throughput for different workload types while managing access time through informed proactive operations
3Quantity of substance
If data is stored in QLC format for high capacity, then storage density is improved, but access speed and computational performance deteriorate
Solution Approach 1:
The non-volatile memory is segmented into different formats (QLC and SLC) with different characteristics. QLC memory provides high storage density for bulk data, while SLC memory provides fast access for computational workloads. The system dynamically segments data between these formats based on accelerator needs, maintaining high overall storage density while enabling fast access when required
Solution Approach 2:
When the storage control unit receives a hint from an accelerator about upcoming data access needs, it proactively transfers the required data from QLC to SLC memory format before the accelerator actually needs it. This preliminary action ensures that when the accelerator accesses the data, it is already in the faster SLC format, thus improving access speed without permanently sacrificing storage density
Data Source
AI summary
Solid State Drive (SSD) devices with hardware accelerators and methods for apportioning storage resources in the SSD are disclosed. SSDs typically comprise an array of non-volatile memory devices and a controller which manages access to the memory devices. The controller may also comprise one or more accelerators to either improve the performance of the SSD itself or to offload specialized computation workloads of a host-computing device. Different accelerators may be dynamically assigned portions of the non-volatile memory array according to the type of data being accessed and/or the throughput required. Provision is also made for the data to be accessed directly by the accelerators bypassing the controller and for a hinting mechanism to improve accelerator performance.