Tan Zhangxi, director of risc-v Foundation: risc-v has gradually expanded from the edge to the center

  in the past , Due to the closed-loop Technology , As a result, the development of processors has encountered some bottlenecks .2010 year ,UC Berkeley Developed open source RISC-V, From now on , Set freedom 、 Simple 、 Efficient in one RISC-V It has been widely used .

2022 year 7 month 21 Japan , Sponsored by China open source software promotion alliance , Sadie media 、《 Software and integrated circuits 》 Co sponsored by the magazine ,CSDN Exclusive live “ The 17th open source China open source world summit ” On ,RISC-V Director of the foundation 、 tsinghua - Berkeley RISC Tan Zhangxi, joint director of the international open source Laboratory , brought 《RISC-V And open source Era 》 Keynote speech of .

The following is the transcript of Tan Zhangxi's speech ：

Hello everyone , I am a RIOS Tan Zhangxi of the Laboratory , The theme of today's speech is 《RISC-V And open source Era 》.

As shown in the figure below , Past 40 The development of microprocessor industry during the year .

X The axis is the year coordinate ,Y The axis is the number corresponding to the year , from Transistors（ Semiconductor transistor ）、Single-Thread Performance（ Single threaded performance ）、Frequency（ Main frequency ）、Typical Power（ Power waste ）、Number of Logical Cores（ Processor cores ） Several indicators , With the development of semiconductor technology , The density of semiconductor transistors increases exponentially , But single thread performance has not increased exponentially , But gradually slow down , Including the dominant frequency at 2000 It is difficult to have a significant growth after . In the whole power consumption , High end processors are 100 About tile , The number of processor cores also increases with the growth of semiconductors , At present, in the state of dozens to hundreds of nuclei . so to speak , In the past 40 year , The development of processors has also encountered some bottlenecks .

On the right side of the picture , The show is Intel Iteration and development of processors . from 20 century 90 From the end of the decade to the present , In especial 2014 Years later , stay 14 Nano technology has not changed significantly for many years , It's all because of the bottleneck of technological development , Real processor technology becomes a closed loop . therefore ,2010 year ,UC Berkeley Developed open source RISC-V.

RISC-V Characteristics

 RISC-V It has the following characteristics ：

• Standards are open and free ;
• Simple and more efficient ;
• You can choose freely ;
• Modular governance architecture ;
• Easily enhanced ;
• Maintained by the community ;
• Very safe 、 trusted .

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RISC-V Widely used

stay RISC-V Within ten years of invention , It has been widely used .

from RISC-V According to the statistics of the foundation , Almost more than every year 60% Growth rate of , It covers chip design 、 System 、IO, Applied in different industries 、 Research Institute 、 university 、 Research laboratories and other institutions . although RISC-V It's a hardware , But there are still many software participants .

at present , There are more than 750 individual RISC-V Members of , Also have 50 Many countries and regions are RISC-V In Ecology ,RISC-V Truly embraced by all walks of life .

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RISC-V The stage of development

  Looking back over the past ten years RISC-V Development history of , It can be divided into four stages .

• The first stage ：2010-2016 year , At the very beginning RISC-V It's just simple ISA Definition , Including some early Test Chips, The software is also relatively simple .
• The second stage ：2017-2018 year , Some mainstream American manufacturers , take 32 Bit RISC-V As a micro controller , It is used in large main processors and real products . This is the time ,RISC-V The software complexity of is also improved , The early test program has been upgraded to Bare Metal（ Bare metal ） The firmware of , Including some control procedures .
• The third stage ：2019-2020 year ,RISC-V The complexity of hardware and software has been further improved , The field of application has also been developed . except 32 position Bare Metal（ Bare metal ） Outside the processor , There is also the so-called privilege model , Run a slightly more complex operating system . It is common for a large number of people to loT It's used in SoC, Chip will be used RISC-V Intelligent machine . In this era RISC-V Software is more complex , Have real-time operating system and professional Firmware.
• The fourth stage ：2021 Years later ,RISC-V The hardware on the market has been further developed , Including a large number of 64 position RISC-V Chip usage 、 Multicore CPU, And vector processors 、Hypervisor Vector expansion of complex data center processors , The processor Hypervisor It is an extension of the management mode . meanwhile , a large number of AI processor 、Application Processors All use RISC-V Be the master . In this era, software is becoming more and more complex , Including complete Linux, It even appeared AI Of Compilers, It's all based on RISC-V Processor of intelligent machine .

     RISC-V From its birth to the past decade, it has developed rapidly , Its application field has expanded from simple hardware to mainstream and complex hardware , There are also some complex software .RISC-V Gradually extend from the edge to the center . 

RISC-V Bring more possibilities  

  Pictured above , yes RISC-V The growth of . According to the Semico Research Market research report forecasts , To 2025 year , Will achieve 624 Billions of RISC-V Processor core ,CAGR（ Compound annual growth rate ） yes 146.2%.

and RISC-V Market growth , Mainly because RISC-V Through extension instructions , Accelerate and customize expansion , Did it Arm and Intel Things you can't do .

For example, there is a company called Ruisi core , Recently released some products , By using RISC-V Added some vector extension instructions , It has achieved an improvement beyond the traditional performance , In some practical application fields , Such as low-power audio 、 High assurance audio processing , You can compare Arm、 Other traditional schemes have doubled .

RISC-V The trend of development in the future  

RISC-V It also brings other developments in the industrial chain . lately ,Goolge Launched GoogleOpen Silicon, Using open source EDA、 Open source IP Provide the whole process of open source chip design .

Predict 2025 year , A large number of processors will use RISC-V, And many new production chips will use open source EDA To do it . With RISC-V To lead , The whole industry chain is the trend of open source , This will be a very noteworthy point in the next few years .

Click on 2022（ The seventeenth ） Open source China open source World Summit Forum -CSDN live broadcast , See more wonderful speeches ！