RFR: Newer AMD 17h (EPYC) Processor family defaults

[Rohit Arul Raj]

Hello All,

I am Rohit Arul Raj, working at AMD India Pvt Ltd.

This is my first contribution to OpenJDK, so please guide me in case I
have overlooked any process guidelines.
I would like an volunteer to review this patch (openJDK9) which sets
flag/ISA defaults for newer AMD 17h (EPYC) processor and help us with
the commit process.

Webrev: https://www.dropbox.com/sh/08bsxaxupg8kbam/AADurTXLGIZ6C-tiIAi_Glyka?dl=0
I have also attached the patch (hg diff -g) for reference.

Note:
1) I have applied for Oracle Contributor Agreement on 30Aug2017.
2) I have applied the changes on top of openJDK9/hotspot:
    changeset:   12823:b756e7a2ec33
    tag:         tip
    user:        prr
    date:        Thu Aug 03 18:56:57 2017 +0000
    summary:     Added tag jdk-9+181 for changeset 4a443796f6f5

3) I have done regression testing using jtreg ($make default) and
didnt find any regressions.
     There was 1 additional failure in the base run
(java/util/ServiceLoader/ModulesTest.java), but was not able to
reproduce it when I ran the test individually.

      Base Run:
      ==========
      Test results: passed: 4,749; failed: 5; error: 2
       Report written to
/home/rohit/project/submit/9dev-base/jdk/testoutput/jdk_core/JTreport/html/report.html
       Results written to
/home/rohit/project/submit/9dev-base/jdk/testoutput/jdk_core/JTwork
       Error: Some tests failed or other problems occurred.
       Summary: jdk_core
       FAILED: java/io/BufferedInputStream/CloseStream.java
       FAILED: java/io/Serializable/unresolvableObjectStreamClass/UnresolvableObjectStreamClass.java
       FAILED: java/nio/channels/AsyncCloseAndInterrupt.java
       FAILED: java/util/ServiceLoader/ModulesTest.java
       FAILED: jdk/internal/reflect/constantPool/ConstantPoolTest.java
       FAILED: sun/security/pkcs11/Secmod/AddTrustedCert.java
       FAILED: sun/security/pkcs11/tls/TestKeyMaterial.java
       TEST STATS: name=jdk_core  run=4756  pass=4749  fail=7
       EXIT CODE: 3
       EXIT CODE: 3
        ../../test/TestCommon.gmk:398: recipe for target 'jtreg_tests' failed
        make[2]: *** [jtreg_tests] Error 3
        Makefile:43: recipe for target 'jdk_core' failed
        make[1]: *** [jdk_core] Error 2
        Makefile:77: recipe for target 'jdk_core' failed
        make: *** [jdk_core] Error 2

        Patch Run:
        =========
       Test results: passed: 4,750; failed: 4; error: 2
        Report written to
/home/rohit/project/submit/9dev/jdk/testoutput/jdk_core/JTreport/html/report.html
        Results written to
/home/rohit/project/submit/9dev/jdk/testoutput/jdk_core/JTwork
        Error: Some tests failed or other problems occurred.
        Summary: jdk_core
        FAILED: java/io/BufferedInputStream/CloseStream.java
        FAILED:
java/io/Serializable/unresolvableObjectStreamClass/UnresolvableObjectStreamClass.java
        FAILED: java/nio/channels/AsyncCloseAndInterrupt.java
        FAILED: jdk/internal/reflect/constantPool/ConstantPoolTest.java
        FAILED: sun/security/pkcs11/Secmod/AddTrustedCert.java
        FAILED: sun/security/pkcs11/tls/TestKeyMaterial.java
        TEST STATS: name=jdk_core  run=4756  pass=4750  fail=6
        EXIT CODE: 3
        EXIT CODE: 3
         ../../test/TestCommon.gmk:398: recipe for target 'jtreg_tests' failed
         make[2]: *** [jtreg_tests] Error 3
         Makefile:43: recipe for target 'jdk_core' failed
         make[1]: *** [jdk_core] Error 2
         Makefile:77: recipe for target 'jdk_core' failed
         make: *** [jdk_core] Error 2

  Is there any further testing required?

  Please let me know your comments.

Thanks,
Rohit