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2021-03-16 16:00:14 → wroathe joins (~wroathe@c-68-54-25-135.hsd1.mn.comcast.net)
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2021-03-16 16:09:52 <curiousgay> yushyin: well then default to amount of CPU cores is good enough
2021-03-16 16:13:37 → geekosaur joins (82650c7a@130.101.12.122)
2021-03-16 16:13:47 <codygman`> Isn't resource finalization in effect systems still an unsolved issue as well? I recall at least a tricky issue on that subject with Eff.
2021-03-16 16:14:53 hackage api-tools 0.9.0.0 - DSL for generating API boilerplate and docs https://hackage.haskell.org/package/api-tools-0.9.0.0 (AdamGundry)
2021-03-16 16:15:15 × molehillish quits (~molehilli@2600:8800:8d06:1800:6cd8:b958:caec:b1dc) (Remote host closed the connection)
2021-03-16 16:15:36 ← zopsi_ parts (zopsi@2600:3c00::f03c:91ff:fe14:551f) ("Leaving")
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2021-03-16 16:16:15 <yushyin> curiousgay: and the go runtime does a similar thing 'The GOMAXPROCS variable limits the number of operating system threads that can execute user-level Go code simultaneously.' where the default value is the number of logical CPUs reported by the OS.
2021-03-16 16:16:32 <yushyin> curiousgay: this is very similar to capabilities, if you ask me.
2021-03-16 16:17:48 → Feuermagier joins (~Feuermagi@2a02:2488:4211:3400:246e:bf09:8453:9d6)
2021-03-16 16:17:55 <curiousgay> yushyin: huh, I've seen discussion between Go developers in 2012 where GOMAXPROCS is the limit to OS threads, defaulted to 10000, because blocking code in CGo caused spawning thousands of OS threads
2021-03-16 16:19:18 → Benzi-Junior joins (~BenziJuni@88-149-67-143.du.xdsl.is)
2021-03-16 16:19:25 <curiousgay> never mind
2021-03-16 16:19:38 × idhugo_ quits (~idhugo@87-49-147-45-mobile.dk.customer.tdc.net) (Ping timeout: 245 seconds)
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2021-03-16 16:21:15 <curiousgay> yushyin: well, the difference is that GOMAXPROCS is an environment variable and doesn't require user to manually pass something like "-rtsopts=-N" to compiler
2021-03-16 16:21:16 <yushyin> you can still have many many blocking OS threads, GOMAXPROCS is more similar to the virtual CPUs/capabilities
2021-03-16 16:21:52 <loyon> TIL, you can run the editor in the web browser, pretty awesome: https://godotengine.org/editor/latest/godot.tools.html
2021-03-16 16:22:06 <yushyin> curiousgay: yes, GOMAXPROCS has a different default, but as I linked you earlier you can set a different default at compile time
2021-03-16 16:22:30 × codygman` quits (~user@47.186.207.161) (Ping timeout: 260 seconds)
2021-03-16 16:22:37 <yushyin> so no harm done?
2021-03-16 16:22:39 hiredman_ is now known as hiredman
2021-03-16 16:23:12 <curiousgay> yeah, I'll need a separate file to not repeat typing the same option again
2021-03-16 16:24:37 × hyperisco quits (~hyperisco@d192-186-117-226.static.comm.cgocable.net) (Remote host closed the connection)
2021-03-16 16:24:38 <curiousgay> because there is no way GHC devs will change their default from "-N1" to "-N"
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2021-03-16 16:28:58 <dolio> The program can be set to use -N when compiling it.
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2021-03-16 16:29:51 <merijn> curiousgay: But GHC doesn't need to spawn 1 OS thread per blocking IO thing, so there's no reason to have a limit that high
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2021-03-16 16:30:50 <merijn> curiousgay: GHC's RTS uses an epoll/kqueue/whatever the windows variant is based event loop that blocks/unblocks Haskell threads as needed
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2021-03-16 16:33:02 <curiousgay> merijn: Go does the same thing, the problem with CGo is that it's basically an FFI problem
2021-03-16 16:33:16 × conal quits (~conal@64.71.133.70) (Quit: Computer has gone to sleep.)
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2021-03-16 16:35:09 <dolio> Was there an actual observed problem at some point, or is this whole conversation about how GHC doesn't do whatever Go does?
2021-03-16 16:36:04 <curiousgay> dolio: never mind, it's just me being puzzled about GHC binaries not using more than 1 capability if I don't pass them "-N" flag
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2021-03-16 16:46:26 <yushyin> curiousgay: is it really that of a problem to pass an additional flag at compile time? Maybe the defaults will change in the feature but until then just add the compile-time flag?
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2021-03-16 16:52:06 <curiousgay> yushyin: already done in shell script: stack ghc -- -threaded -rtsopts -with-rtsopts=-N $@
2021-03-16 16:52:32 <xsperry> you can also add it in cabal file
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2021-03-16 17:00:26 <merijn> -N without disabling parallel GC is a great way to make your code super slow, btw
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2021-03-16 17:03:19 <yushyin> if you really want to you can set -with-rtsopts=-N in a global stack/cabal config file
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