P4 Description
OperatingSystemMXBean.getAvailableProcessors should return the number of processors made available to the process. Docker can place limits on it.
Mis-reporting the number can throw off heuristics for optimizing computations based on memory size and available processors.
It is hinted that the number of processors reported from /proc on linux reports the hardware processors not those permitted to the process.
sysconf(_SC_NPROCESSORS_CONF) may be more reliable in this case.
Mis-reporting the number can throw off heuristics for optimizing computations based on memory size and available processors.
It is hinted that the number of processors reported from /proc on linux reports the hardware processors not those permitted to the process.
sysconf(_SC_NPROCESSORS_CONF) may be more reliable in this case.
Attachments
Issue Links
- duplicates
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JDK-6515172 Runtime.availableProcessors() ignores Linux taskset command
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- Resolved
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- relates to
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JDK-8146115 Improve docker container detection and resource configuration usage
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- Resolved
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