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yoshuawuyts's profile
yosh
yosh
yosh
@yoshuawuyts

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yosh

@yoshuawuyts

Software researcher. he/they

Berlin, UTC+2
blog.yoshuawuyts.com
Joined May 2009

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    1. Sabree Blackmon‏ @HeavyPackets Jan 27
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      #Rustlang async-std TIL! Spawned tasks default to panic=abort, which doesn't work with #[should_panic] tests or catch. Threads, OTOH, raise the panic at the site of .join() so we can catch them. They don't force a root panic/abort. The difference makes porting to tasks tricky.

      4 replies 0 retweets 6 likes
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    2. Sabree Blackmon‏ @HeavyPackets Jan 27
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      Understand you can add a panic handler to the spawned task itself, but isn't ideal. Async-std can probably meet in the middle by checking if there's an uncaught panic in the JoinHandle Drop, and configurably either forcing a root aborting or not. Might be a good PR? 🤔

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    3. Sabree Blackmon‏ @HeavyPackets Jan 27
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      Granted, if the JoinHandle leaks without a drop , the panic will remain uncaught, but that's probably okay? It's still an improvement over the current std::thread behavior.

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    4. yosh‏ @yoshuawuyts Jan 27
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      Replying to @HeavyPackets

      The problem we were facing with any form of panic recovery was that once a thread was lost, we had no way to spawn any threads with the corresponding TLS back onto the threadpool. Hence panic=abort seemed like the better option (as opposed to silent resource starvation). 1/2

      1 reply 0 retweets 2 likes
      yosh‏ @yoshuawuyts Jan 27
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      Replying to @yoshuawuyts @HeavyPackets

      With the new threadpool design we're able to revisit this decision. I can't give you the in-depth since I didn't design it, but perhaps @stjepang might. Also if you haven't joined already; we have a very active Discord that's happy to answer questions!https://discord.gg/JvZeVNe 

      2:49 PM - 27 Jan 2020
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      • Sabree Blackmon James<'a, N> where N: ArrayLength<u8>,
      1 reply 0 retweets 2 likes
        1. New conversation
        2. Sabree Blackmon‏ @HeavyPackets Jan 27
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          Replying to @yoshuawuyts @stjepang

          Gotcha. In my case, we're running pretty expensive computational tasks in parallel and a process abort makes life... difficult. Will follow this closely. To discord!

          1 reply 0 retweets 1 like
        3. Florian Gilcher ∠(・.-)―〉 →◎‏ @Argorak Jan 27
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          Replying to @HeavyPackets @yoshuawuyts @stjepang

          At which magnitude are you doing this? I wonder if it weren't better and easier to use a proper threadpool in that case. I don't know of a good `.await`-able one, currently, but it's super easy to wrap existing ones. rayon is perhaps a bit much, but maybe...

          1 reply 0 retweets 1 like
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