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Does anyone know any documentation on how UNIX achieves parallelism in pipelines, especially modern implementations? Is each stage of a piped command just anoth

• woodruffw 4y ago
  Yes, it's just that: each process in the pipeline is spawned, and then blocks as it waits for input from the previous step in the pipeline. I think a better way to think about it is that the UNIX model requires parallelism: without parallelism, each stage in the pipeline would need to fully buffer its intermediate state before forwarding it to the next stage.
  • superdisk 4y ago
    > without parallelism, each stage in the pipeline would need to fully buffer its intermediate state before forwarding it to the next stage. That's how DOS implemented the pipe syntax I believe.
• masklinn 4y ago
  > Is each stage of a piped command just another spun off process? Yes. With, as the name says, a pipe inbetween.