July 2016 - aarch64-port-dev

RFR: AArch64: -XX:-UseOnStackReplacement does not work together with -XX:+TieredCompilation.
by Ningsheng Jian 21 Feb '17

21 Feb '17

Hi, Hotspot patch [1] introduces a test case hotspot/test/compiler/interpreter/DisableOSRTest.java which also exposes the same issue on aarch64. I.e. with -XX:-UseOnStackReplacement and -XX:+TieredCompilation options, there are still OSR compilations found from -XX:+PrintCompilation. On x86, the increment_mask_and_jump just jumps to the next instruction if backedge_counter_overflow is not generated. So there is no such issue - but is it intended? The following fix on AArch64 is to revert [2] to align with x86 code and assign the correct branch target based on the UseOnStackReplacement option. http://people.linaro.org/~ningsheng.jian/disable-osr/webrev.00/ Tested with jtreg. [1] http://hg.openjdk.java.net/jdk9/hs-comp/hotspot/rev/fd222df9f27c [2] http://hg.openjdk.java.net/aarch64-port/jdk8/hotspot/rev/18e5cbbe8abf

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Fwd: Compact strings enablement - JTreg runs
by Stuart Monteith 30 Jan '17

30 Jan '17

Hello, I sent this to the wrong address by accident, and it hadn't bounced - the autocorrect kicked in this time. With a view to enable compact strings by default, I've run JTreg against a build from yesterday with "-XX:-CompactStrings" and "-XX:+CompactStrings". I get the following differences: 0: JTwork-compactoff pass: 5,840; fail: 1,793; error: 21; not run: 331 1: JTwork-compacton pass: 5,836; fail: 1,793; error: 25; not run: 331 0 1 Test fail pass com/sun/jdi/InterruptHangTest.java pass error java/awt/Dialog/CloseDialog/CloseDialogTest.java fail pass java/awt/Graphics2D/DrawString/DrawStringCrash.java pass error java/lang/instrument/PremainClass/NoPremainAgentTest.java pass fail java/rmi/activation/Activatable/restartCrashedService/RestartCrashedService.java pass fail java/rmi/server/RMISocketFactory/useSocketFactory/unicast/UseCustomSocketFactory.java error pass java/util/ResourceBundle/modules/visibility/visibility.sh pass fail java/util/concurrent/tck/JSR166TestCase.java pass error java/util/stream/boottest/java.base/java/util/stream/SpinedBufferTest.java fail pass java/util/zip/EntryCount64k.java pass error sun/security/provider/SecureRandom/StrongSecureRandom.java pass error tools/launcher/ArgFileSyntax.java 12 differences Ideally there would be 0 failures and errors in both, but I'll check to see what the differences were. Some of the names are suspicious, others - such as concurrency tests - look like they have the potential to have issues. AFAICT, this is the only changed needed to make compact strings the default: hotspot/src/cpu/aarch64/vm/globals_aarch64.hpp -- define_pd_global(bool, CompactStrings, false); ++ define_pd_global(bool, CompactStrings, true); hasNegatives - please find attached my most recent results with my hasNegatives intrinsic. The vertical axis is time (logarithmic) -lower is better. The horizontal axis is the number of characters scanned before has_negatives returns true. I'm trying to even-out the middle to lower side of the graph, as I expect has_negatives will trip either early, or late. Regards, Stuart

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hg: aarch64-port/jdk8u-shenandoah/nashorn: Added tag aarch64-shenandoah-jdk8u101-b14-shenandoah-merge-2016-07-25 for changeset 8ac29abb637b
by roman＠kennke.org 25 Jul '16

25 Jul '16

Changeset: 7ed0c877a9a0 Author: rkennke Date: 2016-07-25 09:46 +0200 URL: http://hg.openjdk.java.net/aarch64-port/jdk8u-shenandoah/nashorn/rev/7ed0c8… Added tag aarch64-shenandoah-jdk8u101-b14-shenandoah-merge-2016-07-25 for changeset 8ac29abb637b ! .hgtags

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hg: aarch64-port/jdk8u-shenandoah/langtools: Added tag aarch64-shenandoah-jdk8u101-b14-shenandoah-merge-2016-07-25 for changeset 574995177d3c
by roman＠kennke.org 25 Jul '16

25 Jul '16

Changeset: 0390157d3322 Author: rkennke Date: 2016-07-25 09:46 +0200 URL: http://hg.openjdk.java.net/aarch64-port/jdk8u-shenandoah/langtools/rev/0390… Added tag aarch64-shenandoah-jdk8u101-b14-shenandoah-merge-2016-07-25 for changeset 574995177d3c ! .hgtags

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hg: aarch64-port/jdk8u-shenandoah/jdk: Added tag aarch64-shenandoah-jdk8u101-b14-shenandoah-merge-2016-07-25 for changeset 8f47a5ca3835
by roman＠kennke.org 25 Jul '16

25 Jul '16

Changeset: e4bdb46f28ca Author: rkennke Date: 2016-07-25 09:46 +0200 URL: http://hg.openjdk.java.net/aarch64-port/jdk8u-shenandoah/jdk/rev/e4bdb46f28… Added tag aarch64-shenandoah-jdk8u101-b14-shenandoah-merge-2016-07-25 for changeset 8f47a5ca3835 ! .hgtags

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hg: aarch64-port/jdk8u-shenandoah/jaxws: Added tag aarch64-shenandoah-jdk8u101-b14-shenandoah-merge-2016-07-25 for changeset 8c96044425d3
by roman＠kennke.org 25 Jul '16

25 Jul '16

Changeset: a30c7731b9e9 Author: rkennke Date: 2016-07-25 09:45 +0200 URL: http://hg.openjdk.java.net/aarch64-port/jdk8u-shenandoah/jaxws/rev/a30c7731… Added tag aarch64-shenandoah-jdk8u101-b14-shenandoah-merge-2016-07-25 for changeset 8c96044425d3 ! .hgtags

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hg: aarch64-port/jdk8u-shenandoah/jaxp: Added tag aarch64-shenandoah-jdk8u101-b14-shenandoah-merge-2016-07-25 for changeset 039e3e866217
by roman＠kennke.org 25 Jul '16

25 Jul '16

Changeset: 2dbdc10a60e1 Author: rkennke Date: 2016-07-25 09:45 +0200 URL: http://hg.openjdk.java.net/aarch64-port/jdk8u-shenandoah/jaxp/rev/2dbdc10a6… Added tag aarch64-shenandoah-jdk8u101-b14-shenandoah-merge-2016-07-25 for changeset 039e3e866217 ! .hgtags

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hg: aarch64-port/jdk8u-shenandoah/hotspot: 2 new changesets
by roman＠kennke.org 25 Jul '16

25 Jul '16

Changeset: 997386c525f7 Author: rkennke Date: 2016-07-22 16:16 +0200 URL: http://hg.openjdk.java.net/aarch64-port/jdk8u-shenandoah/hotspot/rev/997386… When concurrent mark/update has been beaten by Java update, don't bother marking through offending object. ! src/share/vm/gc_implementation/shenandoah/shenandoahHeap.inline.hpp Changeset: 3683fbd9bcad Author: rkennke Date: 2016-07-25 09:45 +0200 URL: http://hg.openjdk.java.net/aarch64-port/jdk8u-shenandoah/hotspot/rev/3683fb… Added tag aarch64-shenandoah-jdk8u101-b14-shenandoah-merge-2016-07-25 for changeset 997386c525f7 ! .hgtags

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hg: aarch64-port/jdk8u-shenandoah/corba: Added tag aarch64-shenandoah-jdk8u101-b14-shenandoah-merge-2016-07-25 for changeset f3c344a9fb69
by roman＠kennke.org 25 Jul '16

25 Jul '16

Changeset: 794710cb3330 Author: rkennke Date: 2016-07-25 09:45 +0200 URL: http://hg.openjdk.java.net/aarch64-port/jdk8u-shenandoah/corba/rev/794710cb… Added tag aarch64-shenandoah-jdk8u101-b14-shenandoah-merge-2016-07-25 for changeset f3c344a9fb69 ! .hgtags

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hg: aarch64-port/jdk8u-shenandoah: Added tag aarch64-shenandoah-jdk8u101-b14-shenandoah-merge-2016-07-25 for changeset da41e334aab1
by roman＠kennke.org 25 Jul '16

25 Jul '16

Changeset: 1e7676dd1b33 Author: rkennke Date: 2016-07-25 09:45 +0200 URL: http://hg.openjdk.java.net/aarch64-port/jdk8u-shenandoah/rev/1e7676dd1b33 Added tag aarch64-shenandoah-jdk8u101-b14-shenandoah-merge-2016-07-25 for changeset da41e334aab1 ! .hgtags

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