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# performances
Slackbot
10/27/2022, 3:59 AMThis message was deleted.
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Chris Lee
10/27/2022, 4:03 AMIt defaults to number of CPUs. Set ‘org.gradle.workers.max’ to adjust.
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thadhouse
10/27/2022, 4:06 AMWell its not defaulting to the number of CPUs. I have 64. How does it get the default.
thadhouse
10/27/2022, 4:08 AMLooks like Runtime.getRuntime().availableProcessors(); which is returning 8. Hmm
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Chris Lee
10/27/2022, 4:24 AMIs it a VM or container?
Chris Lee
10/27/2022, 4:26 AMPerhaps check /proc/cpuinfo
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thadhouse
10/27/2022, 4:33 AMBaremetal hardware. /proc/cpuinfo shows all 64 procs
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Chris Lee
10/27/2022, 4:37 AMOdd. What jvm / version is Gradle using?
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thadhouse
10/27/2022, 4:38 AMDoes it with both 11 and 17
thadhouse
10/27/2022, 4:38 AMOpenJDK 64-Bit Server VM (Red_Hat-17.0.4.1.1-1.fc36) (build 17.0.4.1+1, mixed mode, sharing)
thadhouse
10/27/2022, 4:38 AMOpenJDK 64-Bit Server VM (Red_Hat-11.0.16.1.1-1.fc36) (build 11.0.16.1+1, mixed mode, sharing)
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Chris Lee
10/27/2022, 4:40 AMNothing related set in gradle.properties? A few locations to check - project dir, $home/.gradle mainly.
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thadhouse
10/27/2022, 4:41 AMIts definitely not gradle, Runtime.getRuntime().availableProcessors() in a standalone program returns 8 at well...
thadhouse
10/27/2022, 4:42 AMFor now I just set a gradle.properties in my home directory that brings it up to 56, and that helps a lot. It was weird switching to linux and having my C++ complile times get exponentially slower. Thats generally not the case.
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Chris Lee
10/27/2022, 4:42 AMAh yea. Is it perhaps 8 cores with threading? What is the processor?
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thadhouse
10/27/2022, 4:42 AMThreadripper 3970X
thadhouse
10/27/2022, 4:42 AM32 cores, 64 threads.
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Chris Lee
10/27/2022, 4:43 AMSeems like that jvm is mis-identifying the cores.
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thadhouse
10/27/2022, 4:43 AMYeah. Whats weird is copying the processor code out of the JVM into a standalone exe seems to work ok.
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Chris Lee
10/27/2022, 4:44 AMyea. Perhaps check openjdk source for how it determines cpus, possibly hints in there.
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thadhouse
10/27/2022, 4:45 AMIt does normal things with sysconf and NPROCESSORS
thadhouse
10/27/2022, 4:45 AMI'll keep playing around, and if I can't find anything I'll make an issue on Java itself.
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thadhouse
10/27/2022, 4:53 AM Copy code
[0.001s][trace][os] active_processor_count: using static path - configured processors: 64
[0.001s][trace][os] active_processor_count: sched_getaffinity processor count: 64
[0.001s][trace][os] active_processor_count: determined by OSContainer: 8
[0.001s][debug][os] Initial active processor count set to 8
[0.001s][trace][os] active_processor_count: determined by OSContainer: 8thadhouse
10/27/2022, 4:53 AMFor some reason it thinks its containerized
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Chris Lee
10/27/2022, 4:58 AMIs cgroups configured, or perhaps taskset?
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thadhouse
10/27/2022, 4:59 AMNot that I know of. I'm mostly windows, so I know thats mostly docker stuff, but don't know how to configure them, or check if theyre configured.
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Chris Lee
10/27/2022, 5:02 AMPerhaps something here of use. Hints at turning off container support.
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thadhouse
10/27/2022, 5:03 AMthadhouse
10/27/2022, 5:04 AMApparently its this, fixed in Java 18
thadhouse
10/27/2022, 5:04 AMAnd 17.0.5. I'm still on 17.0.4
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Chris Lee
10/27/2022, 5:06 AMGood find.
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