support for HPCv2 Kintex-7 k420 board w/ 1000 cores@128MHz

[samsoniuk]

Support for HPCv2 Kintex-7 k420 board w/ 1000 cores@128MHz!

Changes to be committed: modified: corescore.core new file: data/hpc_k7.xdc new file: rtl/corescore_hpc_k7.v new file: rtl/hpc_k7_clock_gen.v

Special remarks:

• based in the Nexys board (different FPGA, same tool).
• differently from other corescore boards, I decided increase the core speed by 8x, as long the board calls itself "HPC"
• as effect, the UART speed increased 8x too
• there is room for more cores

[olofk]

Fantastic! I managed to miss this until now. Welcome to the kilocore club :)

You say there's room for more cored. How much space is left in the devices? If you can fit another 500 cores you can get to the third place. Just saying... ;)

[samsoniuk]

The Vivado's report shows 86.98% of occupation with 1000 cores, with means that there is space for more 149 cores. For sure Vivado can fit it, but I am not sure how long and how many memory it requires (I guess the place and route effort increases at the same time we approaches to the 100% of occupation).

In the future I will try review the Vivado's configuration in order to try fit more cores! Maybe check the synthesis report in order to try find something that can be optimized even more...

Thank you for the feedback and congratulations for you too: SERV is really amazing! :)

[olofk]

@samsoniuk Cool! Thanks for the info. Ok, in that case it might not be worth the effort to add the last cores. It will certainly take more time when you get closer to 100%. But feel free to update the numbers if you get bored some day and decide to implement a higher number :)