读书笔记 Advanced FPGA(5)High-Level Design

本文探讨了图形状态机在设计过程中的优势,包括易读性和自动化的速度/面积优化。此外,还讨论了自动设计工具如何进行架构权衡,如流水线与折叠实现的选择。理解软硬件设计分区的标准对于未来的系统工程师至关重要。
SUMMARY OF KEY POINTS
. Graphical state machines are much easier to read and allow for automatic
speed
/area optimizations.
. Of key importance is the readability of the top level of abstraction where
the design takes place. Of less importance is the readability of the autogenerated RTL.

. Some abstract design tools such as Synplify DSP allow for automatic architectural trade-offs such as pipelined versus folded implementations.

Understanding the criteria for partitioning a design between hardware and software will be a requirement of system engineers into the foreseeable future



Contents Multi-Rail High-Level Design ....................................................................................................................1 Introduction..................................................................................................................................................3 Objectives................................................................................................................................................3 Reference Documents...........................................................................................................................3 Document Structure...............................................................................................................................3 Acronym Table........................................................................................................................................3 Design Overview ........................................................................................................................................4 System level............................................................................................................................................4 lnetctl..................................................................................................................................................5 DLC library...............................................................................................................................................5 LNet IOCTL .............................................................................................................................................5 LNet..........................................................................................................................................................5 Primary NID.............................................................................................................................................6 PTLRPC...................................................................................................................................................7 LNDs ........................................................................................................................................................7 NUMA Selection .....................................................................................................................................7 Dynamic peer discovery........................................................................................................................7 Over-the-wire protocol...........................................................................................................................8 Use Case scenarios...............................................................................................................................8 Edge Case scenarios.............................................................................................................................9 Debugging Requirements .......................................................................................................................10 User Space................................................................................................................................................11 lnetctl................................................................................................................................................11 DLC Library ...........................................................................................................................................11 LNetCtl IOCTL ......................................................................................................................................11 Splitting Adding a Net and Adding an NI ......................................................................................12 Network to Network Interface CPT inheritance ...........................................................................13 2 TCP Bonding vs Multi-Rail..............................................................................................................14 Userspace configuration Parsing vs in-kernel parser.................................................................14 Backwards Compatibility .................................................................................................................14 Adding local NI..................................................................................................................................15 Removing local NI ............................................................................................................................17 Adding Peer NID...............................................................................................................................18 Removing Peer NID....................................................................................
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