展示HN：BPU - 一种用于稳定UART管道的嵌入式调度器
我最近发现了一个小型的ESP32项目，觉得其设计理念非常有趣。<p>BPU（批处理单元）是一个轻量级的嵌入式调度核心，专注于在压力下保持输出管道的稳定（如UART背压、带宽限制、突发生产者）。<p>它并不通过阻塞或扩展无限队列来处理，而是：强制每个时钟周期的字节预算，合并冗余事件，在持续负载下优雅降级，并提供详细的运行时统计信息。<p>该代码库包括设计笔记、流程图和实际执行日志，使得运行时行为非常透明。<p>代码库链接：
<a href="https://github.com/choihimchan/bpu_v2_9b_r1" rel="nofollow">https://github.com/choihimchan/bpu_v2_9b_r1</a><p>我一直在为它开发一个ESP-IDF后端，阅读文档让我对小型系统中的可观察性和背压处理有了很多想法。<p>想知道其他人对这种方法的看法。
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I recently came across this small ESP32 project and found the design ideas behind it very interesting.<p>BPU (Batch Processing Unit) is a lightweight embedded scheduling core focused on keeping output pipelines stable under pressure (UART backpressure, limited bandwidth, bursty producers).<p>Instead of blocking or growing unbounded queues, it: enforces per-tick byte budgets, coalesces redundant events, degrades gracefully under sustained load, exposes detailed runtime statistics.<p>The repository includes design notes, flow diagrams, and real execution logs, which makes the runtime behavior very transparent.<p>Repo:
<a href="https://github.com/choihimchan/bpu_v2_9b_r1" rel="nofollow">https://github.com/choihimchan/bpu_v2_9b_r1</a><p>I’ve been working on an ESP-IDF backend for it, and reading through the docs gave me a lot of ideas about observability and backpressure handling in small systems.<p>Curious what others think about this approach.