Lichee Pi 4A: Serious RISC-V Desktop Computing [video]

• openc910

  42 1,047 1.3 Verilog

  OpenXuantie - OpenC910 Core

  

Here is the source code* for the CPU:

https://github.com/T-head-Semi/openc910

* AFAIK they didn't opensource the pre ratification vector extension implementation they ship with the taped out chip.

• riscv-gnu-toolchain

  11 6 0.0 C

  GNU toolchain for RISC-V, including GCC (by brucehoult)

The TH1520 has much faster memcpy speeds at every level of cache and DRAM.

https://hoult.org/JH7110_memcpy.txt

https://hoult.org/JH7110_memcpy.txt

And yet ... both Richard Jones at Fedora and I have found that the VisionFive 2 is actually slightly faster at building software packages!

My result was that building the same binutils + gcc + newlib snapshot (an old one with RVV 0.7.1 support)...

https://github.com/brucehoult/riscv-gnu-toolchain

... the VisionFive 2 takes 108 minutes while the Lichee Pi 4A takes 122 minutes.

That's with the supplied fan on the LPi4A (and confirmed it's not throttling) and no cooling at all on the VisionFive 2. I used the same Samsung external USB3 SSD on both -- the VisionFive 2 gets slightly faster transfer speeds (IIRC 190 MB/s vs 160) with that, but that's not enough to matter: just 12s difference on the time to tar up the source directory, compared to a 14 minute build time difference. Both have enough RAM to cache everything anyway.

> VF2 GPU: IMG BXE-4-32 Lichee Pi: ?? Anyone?

BXM-4-64

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  Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.

  

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