3 ways to break dead lock

本文介绍了一种资源管理策略,包括特殊资源仅能被特定线程使用、允许被占用资源可供其他线程请求及资源从低级别到高级别的获取原则。此外还提出线程管理器应具备中断锁定线程并使其释放资源的能力。

1) supply special resources.

 

This resource can be only used by one special thread.

 

2) permit held up resources can be required by other threads.

 

threads manager should be able to signal interrupt command to let locked up threads giving up resources.

 

3) resources have different level --- low level resource and high level resource.

 

Resource grabing must happen from low level to high level.

Here are some common methods to optimize FPGA area: #### Logic Sharing Logic sharing involves identifying and reusing common logic blocks within the design. Instead of implementing the same logic multiple times, a single instance can be shared among different parts of the circuit. For example, if multiple functions require the same arithmetic operation, implementing it once and routing the inputs and outputs appropriately can save a significant amount of FPGA resources. #### Resource Mapping Properly mapping resources to the FPGA fabric is crucial. This includes selecting the appropriate look - up tables (LUTs), flip - flops, and other primitives based on the requirements of the design. Tools provided by FPGA vendors can help in optimizing the mapping process to use the available resources more efficiently. #### Logic Compression Techniques such as logic folding and collapsing can be used to reduce the number of logic gates. Logic folding combines multiple logic operations into a single operation, while collapsing eliminates redundant logic gates. #### Time - Division Multiplexing Logic time - division multiplexing can be used to share hardware resources. By time - multiplexing different operations on the same functional unit, the overall area occupied by the circuit can be reduced. However, it should be noted that this may introduce some control logic and multiplexers, which could potentially affect the critical path delay [^1]. ```verilog // Example of time - division multiplexing in Verilog module time_division_multiplexer ( input wire clk, input wire [7:0] data_a, input wire [7:0] data_b, output reg [7:0] output_data ); reg select; always @(posedge clk) begin select <= ~select; if (select) begin output_data <= data_a; end else begin output_data <= data_b; end end endmodule ``` #### Algorithm Optimization Optimizing the algorithms implemented on the FPGA can also lead to area savings. For example, using more efficient algorithms for data processing, such as optimized sorting or filtering algorithms, can reduce the amount of logic required.
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