geev03

🦀 Rust PiCalculator on Orange Pi RV2 (riscv64, Armbian Trixie) Compiled and ran a high-precision Pi calculator in Rust on my Orange Pi RV2 (K1X, 8-core @ 1.6 GHz) running Armbian-unofficial Trixie riscv64. The goal: test rustc performance and validate big-integer workloads on RISC-V. ✅ Environment OS: Armbian-unofficial 26.02.0-trunk (Debian Trixie) Kernel: Linux 6.18.5-edge-spacemit Rust: rustc 1.85.0, cargo 1.85.0 (built from source) Display: EZCAP28X @ 1920×1080 Memory: 3.7 GiB RAM, 1.3 GiB used Disk: ext4, 28.96 GiB total GPU: Mesa llvmpipe (LLVM 19.1.7) 🧮 Project: PiCalculator Rust implementation using rug (GMP-backed) to compute 1000 digits of π: rust use rug::{float::Constant, Float}; fn main() { let digits: usize = 1000; let bits: u32 = ((digits as f64) * 3.321928).ceil() as u32 + 10; let pi = Float::with_val(bits, Constant::Pi); let s = pi.to_string_radix(10, Some(digits)); println!("{s}"); } 🧩 Build Notes Needed libgmp-dev and m4 to compile rug cleanly. cargo build --release succeeded without patching. Output verified against known π digits. ⚖️ Performance Comparison Board CPU Time (ms) Real Time (ms) Pi 400 Faster (1.8 GHz, fewer cores) Lower latency RV2 (K1X) Slower per-core, but stable Good throughput Despite having 8 cores, the RV2’s in-order K1X is slower than the Pi 400’s Cortex-A72 for single-threaded math. Still, the build was smooth and the output correct — a great stress test for rustc on riscv64.

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