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This is the official mailing list for the BlackParrot multicore processor!

Please use this list for discussion, questions or updates on BlackParrot in the wild. We'd especially love to hear about BlackParrot in industrial products, academic research, class projects or hobbyist use.

BlackParrot aims to be the default open-source, Linux-capable, cache-coherent, RV64GC multicore used by the world. Although originally developed by the University of Washington and Boston University, BlackParrot strives to be community-driven and infrastructure agnostic, a core which is Pareto optimal in terms of power, performance, area and complexity. In order to ensure BlackParrot is easy to use, integrate, modify and trust, development is guided by three core principles: Be Tiny, Be Modular, and Be Friendly. Development efforts have prioritized ease of use and silicon validation as first order design metrics, so that users can quickly get started and trust that their results will be representative of state-of-the-art ASIC designs. BlackParrot is ideal as the basis for a lightweight accelerator host, a standalone Linux core, or as a hardware research platform.

Welcome to the BlackParrot Flock! (*v*)

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Ruchita, Dan Petrisko16

Mar 15

Stream Hammer, Stream accelerator loopback and other applications

So e_bp_unicore_hammerblade_cfg in FPGA is singe BP core per single MC? Or 2 BP core per 128 MC pod?

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Stream Hammer, Stream accelerator loopback and other applications

So e_bp_unicore_hammerblade_cfg in FPGA is singe BP core per single MC? Or 2 BP core per 128 MC pod?

Mar 15

VAKKALAGADDA TANUSH PAVAN

Mar 12

GSoC 2026: UVM Testbench Development & Coverage Exploration via LLM Agents

Hi Dan and the BlackParrot Team, I am a second-year dual-degree student (Electrical Engineering and

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GSoC 2026: UVM Testbench Development & Coverage Exploration via LLM Agents

Hi Dan and the BlackParrot Team, I am a second-year dual-degree student (Electrical Engineering and

Mar 12

Ruchita, … Dan Petrisko20

Mar 10

VCS Simulation of HammerBlade

Thanks Dan. I guess the configuration bus you are referring to: https://github.com/black-parrot-hdk/

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VCS Simulation of HammerBlade

Thanks Dan. I guess the configuration bus you are referring to: https://github.com/black-parrot-hdk/

Mar 10

Mar 9

Re: Quick question beyond GSoC scope

Hi Aman, My original philosophy of testing was that testbenches are very "expensive" to

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Re: Quick question beyond GSoC scope

Hi Aman, My original philosophy of testing was that testbenches are very "expensive" to

Mar 9

Mar 9

GSoC 2026 - BlackParrot UVM Testbenches Applicant

Hi everyone, I'm Aman Sharma, B.Tech ECE student applying for the BlackParrot UVM testbenches

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GSoC 2026 - BlackParrot UVM Testbenches Applicant

Hi everyone, I'm Aman Sharma, B.Tech ECE student applying for the BlackParrot UVM testbenches

Mar 9

Mar 7

Hi team My name is Som and I am new to this group feature but I am very interested in this domain and

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Hi team My name is Som and I am new to this group feature but I am very interested in this domain and

Mar 7

Aditya Nukala, Dan Petrisko2

Mar 2

Requesting GSOC and Open-source contribution tips

Hi Aditya, I recommend starting with a simple, combinational module like the ALU. I think for the

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Requesting GSOC and Open-source contribution tips

Hi Aditya, I recommend starting with a simple, combinational module like the ALU. I think for the

Mar 2

12/26/25

#GROUP DISCOUNT FOR DUCTS/VENTS CLEANING!

Hello neighbors! I'm planning to get my Ducts/Vents cleaned soon, based on a recommendation from

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#GROUP DISCOUNT FOR DUCTS/VENTS CLEANING!

Hello neighbors! I'm planning to get my Ducts/Vents cleaned soon, based on a recommendation from

12/26/25

Julio Sanchez, Dan Petrisko7

5/27/25

BlackParrot in Virtex ML 507

Hi, Can you please point out corresponding hardware/software logic of #441-443 in the code: https://

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BlackParrot in Virtex ML 507

Hi, Can you please point out corresponding hardware/software logic of #441-443 in the code: https://

5/27/25

Jeffery Lim, Daniel Petrisko7

5/12/25

Certain tests not working

Great! On May 11, 2025, at 6:36 PM, Jeffery Lim <jj...@bu.edu> wrote: Er... well actually (

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Certain tests not working

Great! On May 11, 2025, at 6:36 PM, Jeffery Lim <jj...@bu.edu> wrote: Er... well actually (

5/12/25

Julio Sanchez, Daniel Petrisko4

5/7/25

Gracias Dan. On Saturday, May 3, 2025 at 9:36:51 AM UTC+5:30 Daniel Petrisko wrote: Hi Julio,

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Gracias Dan. On Saturday, May 3, 2025 at 9:36:51 AM UTC+5:30 Daniel Petrisko wrote: Hi Julio,

5/7/25

Jeffery Lim, Dan Petrisko2

4/14/25

Black-Parrot Privileges

Hi Jeffery, One simple sequence to trigger a DMMU fault is: - set up a RW PTE with dirty bit 'D

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Black-Parrot Privileges

Hi Jeffery, One simple sequence to trigger a DMMU fault is: - set up a RW PTE with dirty bit 'D

4/14/25

Julio Sanchez, Dan Petrisko4

4/7/25

Hello Dan, I hope you are doing fine. For bsg_manycore accelerator to pass data between ps.cpp and

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Hello Dan, I hope you are doing fine. For bsg_manycore accelerator to pass data between ps.cpp and

4/7/25

3/25/25

Hammerblade/bsg_replicant

Hi, As per the paper https://www.bsg.ai/papers/HB_ISCA_2024_Camera_Ready_Final.pdf Hammerblade is a

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Hammerblade/bsg_replicant

Hi, As per the paper https://www.bsg.ai/papers/HB_ISCA_2024_Camera_Ready_Final.pdf Hammerblade is a

3/25/25

3/18/25

Communication between BP and BSG Manycore

Can anybody please guide me is there any sample program which communicates between BP and manycore? I

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Communication between BP and BSG Manycore

Can anybody please guide me is there any sample program which communicates between BP and manycore? I

3/18/25

Amit Hiremath, Dan Petrisko3

3/11/25

Executing Python code on bsg_replicant

Thanks Dan. I know bsg_replicant in general uses a C++ runtime API calls which are similar to CUDA.

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Executing Python code on bsg_replicant

Thanks Dan. I know bsg_replicant in general uses a C++ runtime API calls which are similar to CUDA.

3/11/25

Amit Hiremath, Dan Petrisko8

3/5/25

black-parrot-example in Pynqz2

I tried old version of black-parrot-example (https://github.com/Yuan-Mao/zynq-parrot), it is stuck at

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black-parrot-example in Pynqz2

I tried old version of black-parrot-example (https://github.com/Yuan-Mao/zynq-parrot), it is stuck at

3/5/25

Peter Lee (wonjongbot), … Dan Petrisko5

3/3/25

counter overflow at time <x> on Tire kick first test

Hi Dan! Looks like that did the trick! The sim ran successfully. Thank you so much! Quick side note:

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counter overflow at time <x> on Tire kick first test

Hi Dan! Looks like that did the trick! The sim ran successfully. Thank you so much! Quick side note:

3/3/25

Amit Hiremath, Dan Petrisko5

2/28/25

Hammerblade on Alveo U250

Hello Dan, I think, I am able to successfully run co-simulation example, it is matching with vcs

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Hammerblade on Alveo U250

Hello Dan, I think, I am able to successfully run co-simulation example, it is matching with vcs

2/28/25

Amit Hiremath, Dan Petrisko3

2/28/25

Hammerblade on Alveo2

Thanks Dan got it. On the other hand, I also tried black-parrot-example on Pynq z2 board, I am not

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Hammerblade on Alveo2

Thanks Dan got it. On the other hand, I also tried black-parrot-example on Pynq z2 board, I am not

2/28/25

Daniel Petrisko

8/7/24

Re: Config BlackParrot flash on VC707 FPGA

Fantastic guide Glenn, I've learned this method the hard way and it's great that others don

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Re: Config BlackParrot flash on VC707 FPGA

Fantastic guide Glenn, I've learned this method the hard way and it's great that others don

8/7/24

Daniel Petrisko2

5/23/24

Re: Config BlackParrot flash on VC707 FPGA

Creating an IPI block for and connecting to the HLS output is generally easiest. You can find

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Re: Config BlackParrot flash on VC707 FPGA

Creating an IPI block for and connecting to the HLS output is generally easiest. You can find

5/23/24

Lap Dang, Daniel Petrisko2

4/13/24

Config BlackParrot flash on VC707 FPGA

Hi Lap, 1) to build bitstream, you should be the “vivado” directory of whichever example you are

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Config BlackParrot flash on VC707 FPGA

Hi Lap, 1) to build bitstream, you should be the “vivado” directory of whichever example you are

4/13/24

Lap Dang, Daniel Petrisko15

3/6/24

Clone simulate BlackParrot take long time and get error

If you're not running on centos, that's fine and expected. Seems to have completed

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Clone simulate BlackParrot take long time and get error

If you're not running on centos, that's fine and expected. Seems to have completed

3/6/24

Akiho KAWADA, Daniel Petrisko2

3/5/24

Inquiry about the TinyParrot Project for Google Summer of Code

Hi Akiho, The RISC-V ISA manual details these extensions. https://github.com/riscv/riscv-isa-manual

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Inquiry about the TinyParrot Project for Google Summer of Code

Hi Akiho, The RISC-V ISA manual details these extensions. https://github.com/riscv/riscv-isa-manual

3/5/24

Lap Dang, Dan Petrisko3

2/23/24

First time Use BlackParrot

Hi Dan, Thank you for your reply. Pls skip the 2nd question in my previous email. I have some

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First time Use BlackParrot

Hi Dan, Thank you for your reply. Pls skip the 2nd question in my previous email. I have some

2/23/24

Yasas Senevirathne, Daniel Petrisko10

2/17/24

Emulation of black-parrot on FPGA

Hi Yasas, We use vu37p/vu47p. Other collaborators have used enclustra SoMs. Generally ultrascale+

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Emulation of black-parrot on FPGA

Hi Yasas, We use vu37p/vu47p. Other collaborators have used enclustra SoMs. Generally ultrascale+

2/17/24

Koustubh Jain, Prof. Michael Taylor2

2/14/24

Are there any resources to learn Systemverilog?

https://docs.google.com/document/d/1xA5XUzBtz_D6aSyIBQUwFk_kSUdckrfxa2uzGjMgmCU/edit#heading=h.

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Are there any resources to learn Systemverilog?

https://docs.google.com/document/d/1xA5XUzBtz_D6aSyIBQUwFk_kSUdckrfxa2uzGjMgmCU/edit#heading=h.

2/14/24

MeraNaam, Daniel Petrisko2

2/3/24

make tools error

Hi, That target is deprecated as the tools have been separated to a new repo: https://github.com/

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make tools error

Hi, That target is deprecated as the tools have been separated to a new repo: https://github.com/

2/3/24

Anuj Jain, Daniel Petrisko2

2/1/24

Error during installations

Hi Anuj, Please copy text errors into email instead of screenshots and show more of the error

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Error during installations

Hi Anuj, Please copy text errors into email instead of screenshots and show more of the error

2/1/24

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