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Issue	Fix Version	Assignee	Priority	Status	Resolution	Resolved In Build
JDK-8272145	11.0.14-oracle	Harold Seigel	P3	Resolved	Fixed	b01
JDK-8268057	11.0.13	Severin Gehwolf	P3	Resolved	Fixed	b01
JDK-8269875	openjdk8u312	Severin Gehwolf	P3	Resolved	Fixed	b02
JDK-8282584	8u341	David Buck	P3	Resolved	Fixed	b01
JDK-8284591	8u331	Anton Litvinov	P3	Resolved	Fixed	b31
JDK-8282707	8u321	PAWAN CHAWDHARY	P3	Closed	Fixed	b34

On one of our Linux machines we have the following :
- a few CPUs are offline (means the configured cpus are 48 but the online cpus are 32)
- the machine does not have cpusets.effective_cpus

In this case getSystemCpuLoad() / getCpuLoad() returns -1 (because it checks that 48 != 32, and next it checks for cpusets.effective_cpus which is not present ).

See the coding at :
https://hg.openjdk.java.net/jdk/jdk/file/bdc14b8d31ff/src/jdk.management/unix/classes/com/sun/management/internal/OperatingSystemImpl.java#l136

backported by

JDK-8268057 getSystemCpuLoad() returns -1 on linux when some offline cpus are present and cpusets.effective_cpus is not available

JDK-8269875 getSystemCpuLoad() returns -1 on linux when some offline cpus are present and cpusets.effective_cpus is not available

JDK-8272145 getSystemCpuLoad() returns -1 on linux when some offline cpus are present and cpusets.effective_cpus is not available

JDK-8282584 getSystemCpuLoad() returns -1 on linux when some offline cpus are present and cpusets.effective_cpus is not available

JDK-8284591 getSystemCpuLoad() returns -1 on linux when some offline cpus are present and cpusets.effective_cpus is not available

JDK-8282707 getSystemCpuLoad() returns -1 on linux when some offline cpus are present and cpusets.effective_cpus is not available

links to

Commit openjdk/jdk11u-dev/624e91bd

Review openjdk/jdk11u-dev/9

(1 backported by, 2 links to)