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List:       openjdk-serviceability-dev
Subject:    RFR: 8203357 Container Metrics
From:       Bob Vandette <bob.vandette () oracle ! com>
Date:       2018-05-30 19:45:40
Message-ID: 510E46BF-A220-40CC-8752-687C849D9114 () oracle ! com
[Download RAW message or body]

Please review the following RFE which adds an internal API, along with jtreg tests \
that provide  access to Docker container configuration data and metrics.  In addition \
to the API which we hope to take advantage of in the future with Java Flight Recorder \
and a JMX Mbean, I've added an additional option to -XshowSettings:system than dumps \
out the container or host cgroup confguration information.  See the sample output \
below:

RFE: Container Metrics

https://bugs.openjdk.java.net/browse/JDK-8203357

WEBREV:

http://cr.openjdk.java.net/~bobv/8203357/webrev.00


This commit will also include a fix for the following bug.

BUG: [TESTBUG] Test /runtime/containers/cgroup/PlainRead.java fails

https://bugs.openjdk.java.net/browse/JDK-8203691

WEBREV:

http://cr.openjdk.java.net/~bobv/8203357/webrev.00/test/hotspot/jtreg/runtime/containers/cgroup/PlainRead.java.sdiff.html


SAMPLE USAGE and OUTPUT:

docker run —memory=256m --cpuset-cpus 4-7 -it ubuntu bash
./java -XshowSettings:system
Operating System Metrics:
    Provider: cgroupv1
    Effective CPU Count: 4
    CPU Period: 100000
    CPU Quota: -1
    CPU Shares: -1
    List of Processors, 4 total: 
    4 5 6 7 
    List of Effective Processors, 4 total: 
    4 5 6 7 
    List of Memory Nodes, 2 total: 
    0 1 
    List of Available Memory Nodes, 2 total: 
    0 1 
    CPUSet Memory Pressure Enabled: false
    Memory Limit: 256.00M
    Memory Soft Limit: Unlimited
    Memory & Swap Limit: 512.00M
    Kernel Memory Limit: Unlimited
    TCP Memory Limit: Unlimited
    Out Of Memory Killer Enabled: true

TEST RESULTS:

testing runtime container APIs
Directory "JTwork" not found: creating
Passed: runtime/containers/cgroup/PlainRead.java
Passed: runtime/containers/docker/DockerBasicTest.java
Passed: runtime/containers/docker/TestCPUAwareness.java
Passed: runtime/containers/docker/TestCPUSets.java
Passed: runtime/containers/docker/TestMemoryAwareness.java
Passed: runtime/containers/docker/TestMisc.java
Test results: passed: 6
Results written to /export/users/bobv/jdk11/build/jtreg/JTwork

testing jdk.internal.platform APIs
Passed: jdk/internal/platform/cgroup/TestCgroupMetrics.java
Passed: jdk/internal/platform/docker/TestDockerCpuMetrics.java
Passed: jdk/internal/platform/docker/TestDockerMemoryMetrics.java
Passed: jdk/internal/platform/docker/TestSystemMetrics.java
Test results: passed: 4
Results written to /export/users/bobv/jdk11/build/jtreg/JTwork

testing -XshowSettings:system launcher option
Passed: tools/launcher/Settings.java
Test results: passed: 1


Bob.


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