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Posted to issues@maven.apache.org by GitBox <gi...@apache.org> on 2023/01/10 07:19:35 UTC
[GitHub] [maven-mvnd] orpiske opened a new issue, #770: Threads parameter is not working on Apple Silicon
orpiske opened a new issue, #770:
URL: https://github.com/apache/maven-mvnd/issues/770
Obs.: I'm opening a ticket for an issue I noticed while the support for M1 was not yet official. I noticed that this still seem to be happening. Back then, I wrote the following report:
I know support is not official yet, but sharing my experience in the hope it will eventually be useful for when there is an official release.
One thing I noticed is that the build for ARM doesn't seem to respect the `mvnd.threads` setting or the -T flag. Using -T 0.5C here, still causes it to use all cores.
<img width="622" alt="Screenshot 2022-04-04 at 11 16 53" src="https://user-images.githubusercontent.com/1851560/161536224-fb308057-8568-4e12-95f1-7980de60f916.png">
_Originally posted by @orpiske in https://github.com/apache/maven-mvnd/issues/337#issuecomment-1087450339_
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[GitHub] [maven-mvnd] orpiske commented on issue #770: Threads parameter is not working on Apple Silicon
Posted by "orpiske (via GitHub)" <gi...@apache.org>.
orpiske commented on issue #770:
URL: https://github.com/apache/maven-mvnd/issues/770#issuecomment-1401921333
@gnodet thanks. This is what I have:
```
MAVEN_OPTS=-Xms2048m -Xmx3584m
MAVEN_HOME=/Users/opiske/.sdkman/candidates/maven/current
```
My `mvnd.properties` from MVND_HOME seems to use the default values:
```
cat $MVND_HOME/conf/mvnd.properties | grep -i thread
# MVND_MIN_THREADS
# The minimum number of threads to use when constructing the default {@code -T} parameter for the daemon.
# This value is ignored if @{@code -T}, @{@code --threads} or {@code -Dmvnd.threads} is specified on the command
# line, or if {@code mvnd.threads} is specified in {@code ~/.m2/mvnd.properties}.
# mvnd.minThreads = 1
# MVND_THREADS
# The number of threads to pass to the daemon; same syntax as Maven's {@code -T}/{@code --threads} option. Ignored
# if the user passes @{@code -T}, @{@code --threads} or {@code -Dmvnd.threads} on the command
# mvnd.threads =
# MVND_THREAD_STACK_SIZE
# JVM options for the daemon to specify the thread stack size
# mvnd.threadStackSize = 1M
```
And looking at one of my projects, this is what I have:
```
ls ~/code/java/camel/.mvn
extensions.xml jvm.config wrapper/
```
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[GitHub] [maven-mvnd] orpiske closed issue #770: Threads parameter is not working on Apple Silicon
Posted by "orpiske (via GitHub)" <gi...@apache.org>.
orpiske closed issue #770: Threads parameter is not working on Apple Silicon
URL: https://github.com/apache/maven-mvnd/issues/770
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[GitHub] [maven-mvnd] gnodet commented on issue #770: Threads parameter is not working on Apple Silicon
Posted by GitBox <gi...@apache.org>.
gnodet commented on issue #770:
URL: https://github.com/apache/maven-mvnd/issues/770#issuecomment-1387225150
Can you reproduce the issue ?
Are you sure you don't have the `mvnd.threads` property set in [one of the configuration file](https://github.com/apache/maven-mvnd#configuration) ?
It seems to work correctly for me...
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[GitHub] [maven-mvnd] orpiske commented on issue #770: Threads parameter is not working on Apple Silicon
Posted by "orpiske (via GitHub)" <gi...@apache.org>.
orpiske commented on issue #770:
URL: https://github.com/apache/maven-mvnd/issues/770#issuecomment-1431490655
I think I know where the problem may be: the log message correctly displays the scaled down number of threads as I adjust the setting, however the CPU load pattern on both `htop` and on Activity Monitor seems to imply that the load is happening on all Cores.
I am not sure if the problem is indeed w/ Maven Daemon. Maybe it's something specific about how the scheduler distributes the load on this OS/platform.
So, I think we can close this @gnodet.
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[GitHub] [maven-mvnd] orpiske commented on issue #770: Threads parameter is not working on Apple Silicon
Posted by "orpiske (via GitHub)" <gi...@apache.org>.
orpiske commented on issue #770:
URL: https://github.com/apache/maven-mvnd/issues/770#issuecomment-1399251636
@gnodet my `[USER_HOME]/.m2/mvnd.properties` has `mvnd.threads=0.5C`. My understanding is that it would use half of the available cores by default. Is there something else I should look at that could be affecting this?
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[GitHub] [maven-mvnd] gnodet commented on issue #770: Threads parameter is not working on Apple Silicon
Posted by "gnodet (via GitHub)" <gi...@apache.org>.
gnodet commented on issue #770:
URL: https://github.com/apache/maven-mvnd/issues/770#issuecomment-1401834119
I've set my `[USER_HOME]/.m2/mvnd.properties` to add `mvnd.threads=0.5C` and it works fine for me.
Can you check your environment maybe using `set | grep MAVEN` ?
_mvnd_ also checks the `[PROJECT_HOME]/.mvn/mvnd.properties` and `[MVND_HOME]/conf/mvnd.properties`...
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