[
https://issues.apache.org/jira/browse/MNG-7174?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Sander Verbruggen updated MNG-7174:
-----------------------------------
Description:
When supplying -T1C to do a parallel build on macos, maven counts the _logical_
cores, not the _physical_ ones. This results in the system being overloaded and
less responsive (twice the load it can handle).
h2. Steps to reproduce
{{sysctl -a|grep 'cpu.thread_count|cpu.core_count'}} gives this output on my
machine:
{{machdep.cpu.core_count: 4}}
{{ machdep.cpu.thread_count: 8}}
Starting a maven session with -T1C shows maven is using 8 threads instead of
the expected 4:
{{[INFO] Using the MultiThreadedBuilder implementation with a thread count of
8}}
was:
When supplying `-T1C` to do a parallel build on macos, maven counts the
_logical_ cores, not the _physical_ ones. This results in the system being
overloaded and less responsive (twice the load it can handle).
Steps to reproduce:
sysctl -a|grep 'cpu.thread_count\|cpu.core_count' gives this output on my
machine:
machdep.cpu.core_count: 4
machdep.cpu.thread_count: 8
Starting a maven session with `-T1C
Environment:
macos Big Sur
java 8 and 11
> Parallel builds on macos get the thread count wrong
> ---------------------------------------------------
>
> Key: MNG-7174
> URL: https://issues.apache.org/jira/browse/MNG-7174
> Project: Maven
> Issue Type: Bug
> Components: Performance
> Affects Versions: 3.6.3, 3.8.1
> Environment: macos Big Sur
> java 8 and 11
> Reporter: Sander Verbruggen
> Priority: Major
>
> When supplying -T1C to do a parallel build on macos, maven counts the
> _logical_ cores, not the _physical_ ones. This results in the system being
> overloaded and less responsive (twice the load it can handle).
> h2. Steps to reproduce
> {{sysctl -a|grep 'cpu.thread_count|cpu.core_count'}} gives this output on my
> machine:
> {{machdep.cpu.core_count: 4}}
> {{ machdep.cpu.thread_count: 8}}
>
> Starting a maven session with -T1C shows maven is using 8 threads instead of
> the expected 4:
> {{[INFO] Using the MultiThreadedBuilder implementation with a thread count of
> 8}}
>
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
