RFR: 8266217: ZGC: Improve the -Xlog:gc+init output for NUMA

[Stefan Karlsson]

On Wed, 28 Apr 2021 23:02:46 GMT, Jie Fu <jiefu at openjdk.org> wrote:

> Hi all,
> 
> This patch improves the -Xlog:gc+init output for NUMA, which is suggested by StefanK [1].
> The implementation just follows how UseLargePages are setup and printed.
> 
> Before (in docker, not support get_mempolicy)
> 
> [0.007s][info][gc,init] Initializing The Z Garbage Collector
> [0.007s][info][gc,init] Version: 17-internal+0-adhoc..jdk (fastdebug)
> [0.007s][info][gc,init] NUMA Support: Disabled
> ...
> 
> 
> After (in docker, not support get_mempolicy)
> 
> [0.007s][info][gc,init] Initializing The Z Garbage Collector
> [0.007s][info][gc,init] Version: 17-internal+0-adhoc..jdk (fastdebug)
> [0.007s][info][gc,init] NUMA Support: Unsupported
> ...
> 
> 
> Testing:
>   - tier1~3 on Linux/x64, no regression
> 
> Thanks.
> Best regards,
> Jie
> 
> 
> [1] https://mail.openjdk.java.net/pipermail/hotspot-gc-dev/2020-March/028927.html

Marked as reviewed by stefank (Reviewer).

-------------

PR: https://git.openjdk.java.net/jdk/pull/3778