[8u] RFR: 8247469: getSystemCpuLoad() returns -1 on linux when some offline cpus are present and cpusets.effective_cpus is not available

[Andrew Hughes]

On 18:28 Tue 13 Jul     , Severin Gehwolf wrote:
> Hi,
> 
> This is a prerequisite backport for JDK-8265836, which I'd like to
> bring to OpenJDK 8u as the bug is present there too[2]. Note that the
> OperatingSystemMXBean has been made container aware with JDK-8226575[1]
> in 8u272 and better.
> 
> The OpenJDK 11u patch doesn't apply cleanly due to restructuring of the
> code in later JDKs. The gist of the patch is still the same. One
> addition of note is the mapfile-vers change for the new native method.
> 
> Bug: https://bugs.openjdk.java.net/browse/JDK-8247469
> webrev: https://cr.openjdk.java.net/~sgehwolf/webrevs/JDK-8247469/jdk8/02/webrev/
> 
> Testing: Builds on Linux x86_64, Solaris Sparc, AIX.
>          Manually via the reproducer for JDK-8265836. Tier 1 on Linux x86_64
> 
> Thoughts?
> 
> Thanks,
> Severin
> 
> [1] https://bugs.openjdk.java.net/browse/JDK-8226575
> [2] https://bugs.openjdk.java.net/browse/JDK-8269874?focusedCommentId=14432127&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-14432127
> 

Looks good to me. Approved.
-- 
Andrew :)
Pronouns: he / him or they / them
Senior Free Java Software Engineer
OpenJDK Package Owner
Red Hat, Inc. (http://www.redhat.com)

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