#racket on 2020-05-17 — irc logs at freenode.irclog.whitequark.org

2020-05-03 17:48 samth changed the topic of #racket to: Racket v7.7 has been released: https://blog.racket-lang.org/2020/05/racket-v7-7.html -- Racket -- https://racket-lang.org -- https://pkgs.racket-lang.org -- Paste at http://pasterack.org

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02:42 <nisstyre> dzoe: FYI, I was able to get it running on my pinebook pro (aarch64)

02:42 <nisstyre> I'm sure some things don't work, but it runs

02:44 <nisstyre> (thread (letrec ([f (lambda () (sleep 10) (displayln "yolo"))]) (thread f)) ; this runs fine at least

02:44 <nisstyre> meant to include (f) there

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06:51 <dzoe> nisstyre: those are green threads, not actual hardware threads - only futures, places and or-threads actually split the workload between multiple cores.

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15:33 <nisstyre> dzoe: ok fair enough, I wasn't thinking it would prove that parallelism works though obviously

15:34 <nisstyre> it does suck though since the pinebook has 6 cores so obviously you'd want to take advantage of them

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15:55 <dzoe> nisstyre: Could you, please, try the following in Racket CS? (require ffi/unsafe/os-thread) (os-thread-enabled?)

15:56 <dzoe> I'm working on some pointer access, fixnums and flonums benchmarks, it would be very helpful if you could run them on that one as well.

15:57 <dzoe> RPi is not the fastest platform for testing "high performance Racket" :)

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17:31 <nisstyre> dzoe: sure I will give it a shot in a little bit

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17:53 <nisstyre> dzoe: I get #f

17:54 <dzoe> :(

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17:54 <dzoe> So at the moment there's no hope for any real parallelism on arm.

17:55 <dzoe> I'll follow the conversation with Matthew and ask Jesse whether there is any progress in his work on CS and JIT on ARM.

17:56 <dzoe> Apparently without JIT, it doesn't make much sense to even try enabling hardware threading...

17:56 <dzoe> Well... technically, I can spawn multiple shared instances and use mmap for getting shared data structures, but that is REALLY extreme workaround :)

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17:59 <nisstyre> dzoe: maybe I need to compile it with some flag enabled

17:59 <nisstyre> but yeah sounds like it's not working

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