Adaptive Multibit Bus Using Voltage Levels for GPU Interconnects
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Solution Overview
Problem
Complex GPUs face wire congestion due to the use of single-bit transmission wires, leading to delays and increased power consumption, which limits device usage and efficiency.
Innovation Solution
An adaptive multibit bus is introduced, allowing two bits of data to be transmitted over a single-bit wire by utilizing intermediate voltage levels, enabling higher system frequency without area sacrifices and reducing design value, and dynamically switching between data transmission modes based on voltage levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If single-bit transmission wires are used in complex GPUs, then device area is reduced, but wire congestion increases leading to delays and increased power consumption
Solution Approach 1:
The patent merges multiple data transmission channels into a single wire by encoding two bits of data onto one physical wire using voltage level modulation. This combining approach reduces the number of physical wires needed, decreasing wire congestion and associated power consumption while maintaining data transmission capacity.
Solution Approach 2:
The patent changes the voltage level parameter of the transmission wire to encode multiple bits of data. By utilizing different voltage levels (e.g., high, medium, low) on a single wire, the system can represent multiple data states, effectively increasing the information capacity of the wire without adding physical wires.
2Area of stationary object
If single-bit transmission wires are used in complex GPUs, then device area is reduced, but power consumption increases
Solution Approach 1:
The patent merges multiple data transmission channels into a single wire by encoding two bits of data onto one physical wire using voltage level modulation. This combining approach reduces the number of physical wires needed, decreasing wire congestion and associated power consumption while maintaining data transmission capacity.
3Productivity
If voltage levels are increased to transmit more data, then data transmission capacity increases, but power consumption increases
Solution Approach 1:
The patent changes the voltage level parameter of the transmission wire to encode multiple bits of data. By utilizing different voltage levels (e.g., high, medium, low) on a single wire, the system can represent multiple data states, effectively increasing the information capacity of the wire without adding physical wires.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances system performance by increasing frequency at higher voltage levels while reducing power consumption and maintaining efficiency, allowing GPUs to enter low power states sooner.
Implementation Method 1
transmitting two bits of data on the single-bit interconnect... utilizing intermediate voltage levels
Data Source
AI summary
Methods and apparatus relating to an adaptive multibit bus for energy optimization are described. In an embodiment, a 1-bit interconnect of a processor is caused to select between a plurality of operational modes. The plurality of operational modes comprises a first mode and a second mode. The first mode causes transmission of a single bit over the 1-bit interconnect at a first frequency and the second mode causes transmission of a plurality of bits over the 1-bit interconnect at a second frequency based at least in part on a determination that an operating voltage of the 1-bit interconnect is at a high voltage level and that the second frequency is lower than the first frequency. Other embodiments are also disclosed and claimed.