From rkennke at redhat.com  Sun Nov  1 09:34:37 2015
From: rkennke at redhat.com (Roman Kennke)
Date: Sun, 01 Nov 2015 10:34:37 +0100
Subject: Fwd: Build failed in Jenkins: project-shenandoah-jdk8 #17
In-Reply-To: <CAGHtMW=4_3T3AT68ebmwz4VUtj89Hj8twDYEyJ2mUCoZQC3qGA@mail.gmail.com>
References: <146780719.11930.1446319119919.JavaMail.zimbra@zmail12.collab.prod.int.phx2.redhat.com>
	<CAGHtMW=4_3T3AT68ebmwz4VUtj89Hj8twDYEyJ2mUCoZQC3qGA@mail.gmail.com>
Message-ID: <1446370477.4703.52.camel@redhat.com>

Hi Mani,

> Sounds good, let me know so I can enabled those flags and we can full
> reports again.

It should be fine now.

Cheers,
Roman


From roman at kennke.org  Sun Nov  1 11:06:02 2015
From: roman at kennke.org (roman at kennke.org)
Date: Sun, 01 Nov 2015 11:06:02 +0000
Subject: hg: shenandoah/jdk8u/hotspot: Added missing new file.
Message-ID: <201511011106.tA1B62gm002722@aojmv0008.oracle.com>

Changeset: 7664867deafb
Author:    rkennke
Date:      2015-11-01 12:05 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk8u/hotspot/rev/7664867deafb

Added missing new file.

+ src/share/vm/gc_implementation/shenandoah/shenandoahOopClosures.inline.hpp


From roman at kennke.org  Mon Nov  2 12:48:30 2015
From: roman at kennke.org (roman at kennke.org)
Date: Mon, 02 Nov 2015 12:48:30 +0000
Subject: hg: shenandoah/jdk8u/hotspot: Make cld update refs closure in
	shenandoah mark-compact not claim CLDs.
Message-ID: <201511021248.tA2CmUY6023949@aojmv0008.oracle.com>

Changeset: bb4ea34e6892
Author:    rkennke
Date:      2015-11-02 13:48 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk8u/hotspot/rev/bb4ea34e6892

Make cld update refs closure in shenandoah mark-compact not claim CLDs.

! src/share/vm/gc_implementation/shenandoah/shenandoahMarkCompact.cpp


From sadhak001 at gmail.com  Sun Nov  1 11:18:44 2015
From: sadhak001 at gmail.com (Mani Sarkar)
Date: Sun, 1 Nov 2015 11:18:44 +0000
Subject: Fwd: Build failed in Jenkins: project-shenandoah-jdk8 #17
In-Reply-To: <1446370477.4703.52.camel@redhat.com>
References: <146780719.11930.1446319119919.JavaMail.zimbra@zmail12.collab.prod.int.phx2.redhat.com>
	<CAGHtMW=4_3T3AT68ebmwz4VUtj89Hj8twDYEyJ2mUCoZQC3qGA@mail.gmail.com>
	<1446370477.4703.52.camel@redhat.com>
Message-ID: <CAGHtMWmb4PM4aBrniSiLN0aDxt1YO1vwze2r7q+HfPykSf9Y-w@mail.gmail.com>

Hi Roman,

Thanks - I have enabled the flags and set the two instances to build - we
will know in some hours.

On another note, why does these flags not work:

bash ./configure --with-jtreg=$JTREG_DIR --enable-option-checking=fatal
    \
                  --disable-warnings-as-errors --disable-zip-debug-info
   \
                 --with-debug-level=slowdebug --with-jvm-variants=client

Currently we are using the below, which has been working fine:
  bash ./configure --with-cups-include=$WORKSPACE/cups-1.7.0
--with-jtreg=$JTREG_DIR


What are the appropriate flags when setting up the build (using configure)
and executing the build using (make ...), on a CI server for Shenandoah.

Cheers,
Mani

On Sun, Nov 1, 2015 at 9:34 AM, Roman Kennke <rkennke at redhat.com> wrote:

> Hi Mani,
>
> > Sounds good, let me know so I can enabled those flags and we can full
> > reports again.
>
> It should be fine now.
>
> Cheers,
> Roman
>
>


-- 
@theNeomatrix369 <http://twitter.com/theNeomatrix369>*  |  **Blog
<http://neomatrix369.wordpress.com>**  |  *LJC Associate & LJC Advocate
(@adoptopenjdk & @adoptajsr programs)
*Meet-a-Project - *MutabilityDetector
<https://github.com/MutabilityDetector>*  |  **Bitbucket
<https://bitbucket.org/neomatrix369>* * |  **Github
<https://github.com/neomatrix369>* * |  **LinkedIn
<http://uk.linkedin.com/pub/mani-sarkar/71/a77/39b>*
*Come to Devoxx UK 2016:* http://www.devoxx.co.uk/

*Don't chase success, rather aim for "Excellence", and success will come
chasing after you!*

From sadhak001 at gmail.com  Sun Nov  1 19:10:45 2015
From: sadhak001 at gmail.com (Mani Sarkar)
Date: Sun, 1 Nov 2015 19:10:45 +0000
Subject: Fwd: Build failed in Jenkins: project-shenandoah-jdk8 #17
In-Reply-To: <1446370477.4703.52.camel@redhat.com>
References: <146780719.11930.1446319119919.JavaMail.zimbra@zmail12.collab.prod.int.phx2.redhat.com>
	<CAGHtMW=4_3T3AT68ebmwz4VUtj89Hj8twDYEyJ2mUCoZQC3qGA@mail.gmail.com>
	<1446370477.4703.52.camel@redhat.com>
Message-ID: <CAGHtMW=vrZn5Z3CSpVfdfgq8vCGTCAySuqmpOmJptF2vU-y=0Q@mail.gmail.com>

Hi Roman,

These are now good, back in the green, both JDK8 and JDK9 versions:

https://adopt-openjdk.ci.cloudbees.com/view/OpenJDK/job/project-shenandoah-jdk8/20/
https://adopt-openjdk.ci.cloudbees.com/view/OpenJDK/job/project-shenandoah-jdk9/59/

Thanks for fixing these.

Cheers,
Mani

On Sun, Nov 1, 2015 at 9:34 AM, Roman Kennke <rkennke at redhat.com> wrote:

> Hi Mani,
>
> > Sounds good, let me know so I can enabled those flags and we can full
> > reports again.
>
> It should be fine now.
>
> Cheers,
> Roman
>
>


-- 
@theNeomatrix369 <http://twitter.com/theNeomatrix369>*  |  **Blog
<http://neomatrix369.wordpress.com>**  |  *LJC Associate & LJC Advocate
(@adoptopenjdk & @adoptajsr programs)
*Meet-a-Project - *MutabilityDetector
<https://github.com/MutabilityDetector>*  |  **Bitbucket
<https://bitbucket.org/neomatrix369>* * |  **Github
<https://github.com/neomatrix369>* * |  **LinkedIn
<http://uk.linkedin.com/pub/mani-sarkar/71/a77/39b>*
*Come to Devoxx UK 2016:* http://www.devoxx.co.uk/

*Don't chase success, rather aim for "Excellence", and success will come
chasing after you!*

From roman at kennke.org  Mon Nov  2 21:39:47 2015
From: roman at kennke.org (roman at kennke.org)
Date: Mon, 02 Nov 2015 21:39:47 +0000
Subject: hg: shenandoah/jdk9/hotspot: Make process-weakrefs code not check for
	need-updates on hot path. Don't push objects on mark queue that
	don't have refs. Cleanup cruft in marking code.
Message-ID: <201511022139.tA2Ldlv7017967@aojmv0008.oracle.com>

Changeset: 315269d6330c
Author:    rkennke
Date:      2015-11-02 22:39 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk9/hotspot/rev/315269d6330c

Make process-weakrefs code not check for need-updates on hot path. Don't push objects on mark queue that don't have refs. Cleanup cruft in marking code.

! src/share/vm/gc/shenandoah/shenandoahConcurrentMark.cpp
! src/share/vm/gc/shenandoah/shenandoahConcurrentMark.hpp
! src/share/vm/gc/shenandoah/shenandoahConcurrentMark.inline.hpp


From roman at kennke.org  Tue Nov  3 14:12:34 2015
From: roman at kennke.org (roman at kennke.org)
Date: Tue, 03 Nov 2015 14:12:34 +0000
Subject: hg: shenandoah/jdk9/hotspot: Better inlining of evacuation code. More
	efficient bitmap resetting. Better root evacuation. Cleanup.
Message-ID: <201511031412.tA3ECYjV009546@aojmv0008.oracle.com>

Changeset: 0345cbc65dd8
Author:    rkennke
Date:      2015-11-03 15:12 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk9/hotspot/rev/0345cbc65dd8

Better inlining of evacuation code. More efficient bitmap resetting. Better root evacuation. Cleanup.

! src/share/vm/gc/shenandoah/brooksPointer.cpp
! src/share/vm/gc/shenandoah/brooksPointer.hpp
+ src/share/vm/gc/shenandoah/brooksPointer.inline.hpp
! src/share/vm/gc/shenandoah/shenandoahBarrierSet.cpp
! src/share/vm/gc/shenandoah/shenandoahConcurrentMark.inline.hpp
! src/share/vm/gc/shenandoah/shenandoahHeap.cpp
! src/share/vm/gc/shenandoah/shenandoahHeap.hpp
! src/share/vm/gc/shenandoah/shenandoahHeap.inline.hpp
! src/share/vm/gc/shenandoah/shenandoahHeapRegion.cpp
! src/share/vm/runtime/thread.cpp
! src/share/vm/runtime/thread.hpp


From roman at kennke.org  Thu Nov  5 10:35:40 2015
From: roman at kennke.org (roman at kennke.org)
Date: Thu, 05 Nov 2015 10:35:40 +0000
Subject: hg: shenandoah/jdk8u/hotspot: 6 new changesets
Message-ID: <201511051035.tA5AZeiM005814@aojmv0008.oracle.com>

Changeset: 1bfe2d788f42
Author:    rkennke
Date:      2015-11-04 16:13 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk8u/hotspot/rev/1bfe2d788f42

Fix/finish implementing concurrent class unloading.

! src/share/vm/gc_implementation/shenandoah/shenandoahCollectorPolicy.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoahCollectorPolicy.hpp
! src/share/vm/gc_implementation/shenandoah/shenandoahConcurrentMark.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoahConcurrentMark.inline.hpp
! src/share/vm/gc_implementation/shenandoah/shenandoahHeapRegionSet.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoahRootProcessor.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoahRootProcessor.hpp
! src/share/vm/runtime/arguments.cpp

Changeset: bdeee2fcae19
Author:    rkennke
Date:      2015-11-04 16:23 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk8u/hotspot/rev/bdeee2fcae19

Make sure interned strings are alive in Shenandoah.

! src/share/vm/classfile/symbolTable.cpp

Changeset: f83a339b7a2a
Author:    rkennke
Date:      2015-11-04 16:34 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk8u/hotspot/rev/f83a339b7a2a

Various little fixes and improvements to weakref processing and class unloading.

! src/share/vm/gc_implementation/shenandoah/shenandoahConcurrentMark.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoahConcurrentMark.inline.hpp
! src/share/vm/gc_implementation/shenandoah/shenandoahHeap.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoahHeap.hpp
! src/share/vm/gc_implementation/shenandoah/shenandoahHeapRegion.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoahMarkCompact.cpp

Changeset: ae3f3ec57139
Author:    rkennke
Date:      2015-11-04 16:51 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk8u/hotspot/rev/ae3f3ec57139

Mark and update roots in one pass.

! src/share/vm/gc_implementation/shenandoah/shenandoahConcurrentMark.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoahHeap.cpp

Changeset: 2a2bca6be5f6
Author:    rkennke
Date:      2015-11-04 17:05 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk8u/hotspot/rev/2a2bca6be5f6

Make process-weakrefs code not check for need-updates on hot path. Don't push objects on mark queue that don't have refs. Cleanup cruft in marking code.

! src/share/vm/gc_implementation/shenandoah/shenandoahConcurrentMark.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoahConcurrentMark.hpp
! src/share/vm/gc_implementation/shenandoah/shenandoahConcurrentMark.inline.hpp

Changeset: f4dc8f44b89b
Author:    rkennke
Date:      2015-11-05 11:35 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk8u/hotspot/rev/f4dc8f44b89b

Better inlining of evacuation code. More efficient bitmap resetting. Better root evacuation. Cleanup.

! src/share/vm/gc_implementation/shenandoah/brooksPointer.cpp
! src/share/vm/gc_implementation/shenandoah/brooksPointer.hpp
+ src/share/vm/gc_implementation/shenandoah/brooksPointer.inline.hpp
! src/share/vm/gc_implementation/shenandoah/shenandoahBarrierSet.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoahConcurrentMark.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoahHeap.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoahHeap.hpp
! src/share/vm/gc_implementation/shenandoah/shenandoahHeap.inline.hpp
! src/share/vm/gc_implementation/shenandoah/shenandoahHeapRegion.cpp
! src/share/vm/runtime/thread.cpp
! src/share/vm/runtime/thread.hpp


From roman at kennke.org  Fri Nov  6 17:00:50 2015
From: roman at kennke.org (roman at kennke.org)
Date: Fri, 06 Nov 2015 17:00:50 +0000
Subject: hg: shenandoah/jdk8u/hotspot: 2 new changesets
Message-ID: <201511061700.tA6H0o2J001251@aojmv0008.oracle.com>

Changeset: 49b935f6a128
Author:    rkennke
Date:      2015-11-06 17:56 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk8u/hotspot/rev/49b935f6a128

Scan and update roots in one pass in mark-compact.

! src/share/vm/gc_implementation/shenandoah/shenandoahMarkCompact.cpp

Changeset: 916d21c224dd
Author:    rkennke
Date:      2015-11-06 17:59 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk8u/hotspot/rev/916d21c224dd

Disable concurrent class unloading by default on Shenandoah.

! src/share/vm/runtime/arguments.cpp


From roman at kennke.org  Mon Nov  9 15:06:38 2015
From: roman at kennke.org (roman at kennke.org)
Date: Mon, 09 Nov 2015 15:06:38 +0000
Subject: hg: shenandoah/jdk8u/hotspot: 2 new changesets
Message-ID: <201511091506.tA9F6c22024514@aojmv0008.oracle.com>

Changeset: 1f9e79a5348b
Author:    rkennke
Date:      2015-11-09 16:06 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk8u/hotspot/rev/1f9e79a5348b

Removed obsolete code paths.

! src/cpu/x86/vm/shenandoahBarrierSet_x86.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoahBarrierSet.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoahCollectorPolicy.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoahCollectorPolicy.hpp
! src/share/vm/gc_implementation/shenandoah/shenandoahConcurrentMark.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoahConcurrentThread.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoahConcurrentThread.hpp
! src/share/vm/gc_implementation/shenandoah/shenandoahHeap.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoahHeap.hpp
! src/share/vm/gc_implementation/shenandoah/shenandoahHeapRegion.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoahMarkCompact.cpp
! src/share/vm/gc_implementation/shenandoah/vm_operations_shenandoah.cpp
! src/share/vm/gc_implementation/shenandoah/vm_operations_shenandoah.hpp
! src/share/vm/runtime/globals.hpp
! src/share/vm/runtime/vm_operations.hpp

Changeset: c47599f04723
Author:    rkennke
Date:      2015-11-09 16:06 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk8u/hotspot/rev/c47599f04723

Move obj-striding to concurrent marking phase.

! src/share/vm/gc_implementation/shenandoah/shenandoahConcurrentMark.hpp
! src/share/vm/gc_implementation/shenandoah/shenandoahConcurrentMark.inline.hpp


From roman at kennke.org  Wed Nov 11 13:42:53 2015
From: roman at kennke.org (roman at kennke.org)
Date: Wed, 11 Nov 2015 13:42:53 +0000
Subject: hg: shenandoah/jdk8u/hotspot: Implement support for JVMStat,
	fix support for JMX monitoring in Shenandoah.
Message-ID: <201511111342.tABDgrLP009413@aojmv0008.oracle.com>

Changeset: 3efe525ee972
Author:    rkennke
Date:      2015-11-11 14:42 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk8u/hotspot/rev/3efe525ee972

Implement support for JVMStat, fix support for JMX monitoring in Shenandoah.

! src/share/vm/gc_implementation/shenandoah/shenandoahConcurrentThread.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoahHeap.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoahHeap.hpp
+ src/share/vm/gc_implementation/shenandoah/shenandoahMonitoringSupport.cpp
+ src/share/vm/gc_implementation/shenandoah/shenandoahMonitoringSupport.hpp
! src/share/vm/services/memoryService.cpp
! src/share/vm/services/memoryService.hpp


From rkennke at redhat.com  Wed Nov 11 14:50:39 2015
From: rkennke at redhat.com (Roman Kennke)
Date: Wed, 11 Nov 2015 15:50:39 +0100
Subject: How to show the gc pause time with UseShenandoahGC
In-Reply-To: <2e58542c.8ada.15098528da7.Coremail.zjusch@163.com>
References: <d57e656.16a5d.150938c071d.Coremail.zjusch@163.com>
	<1445595037.29192.71.camel@redhat.com>
	<2e58542c.8ada.15098528da7.Coremail.zjusch@163.com>
Message-ID: <1447253439.3092.36.camel@redhat.com>

Hi there,

> I found the tool ?jstat -gcuitl? not work with ShenandoahGC.??It
> would be better if have a similar tool. 

I just committed a change to our jdk8 tree that implements jvmstat and
jmx support for Shenandoah. I verified that jstat -gcutil works now. As
does JConsole, and other monitoring tools as well. Give it a try.

The change is not yet in our JDK9 repo, but should arrive there soon.

Let me know!

Cheers,
Roman


> Thanks.
> 
> At 2015-10-23 18:10:37, "Roman Kennke" <rkennke at redhat.com> wrote:
> >I think you are looking at the right logs. Shenandoah does two
> pauses:
> >InitMark and InitEvac. You can find it in the log:
> >
> >> 2015-10-23T15:10:35.930+0800: 1738.287: [GC InitMark end, 0.017967
> >> secs total = 75497472 K, used = 51861702 K free = 23635769 K]
> >
> >Here you got 12.9 ms for InitMark.
> >
> >The other pause is a bit more difficult to find, because it spans
> over
> >several intervals:
> >The first is FinalMark:
> >> 2015-10-23T15:10:36.182+0800: 1738.538: [GC FinalMark end,
> 0.034520
> >> secs total = 75497472 K, used = 52252771 K free = 23244700 K]
> >
> >34.5ms
> >
> >Then PrepareEvac:
> >
> >> 2015-10-23T15:10:36.183+0800: 1738.539: [GC PrepareEvac end,
> 0.000964
> >> secs total = 75497472 K, used = 23712714 K free = 51784757 K]
> >
> >0.96ms
> >
> >and InitEvac:
> >
> >> 2015-10-23T15:10:36.190+0800: 1738.547: [GC InitEvac end, 0.007175
> >> secs total = 75497472 K, used = 23715364 K free = 51782108 K]
> >
> >7.1ms
> >
> >They all add up to a total pause of 42,56ms
> >
> >Since they all go in one pause, we should probably make a
> measurement
> >interval around them for better usability.
> >
> >When you turn on -XX:+PrintGCDetails you will find interesting pause
> >statistics on program termination. E.g. number of pauses, avg and
> max
> >pause time, std deviation, etc.
> >
> >I hope it helps, let us know!
> >
> >Roman
> >
> 
> 
> ?

From roman at kennke.org  Thu Nov 12 20:35:35 2015
From: roman at kennke.org (roman at kennke.org)
Date: Thu, 12 Nov 2015 20:35:35 +0000
Subject: hg: shenandoah/jdk8u/hotspot: 3 new changesets
Message-ID: <201511122035.tACKZZMB022194@aojmv0008.oracle.com>

Changeset: 51cbad572091
Author:    rkennke
Date:      2015-11-12 21:35 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk8u/hotspot/rev/51cbad572091

Improve JvmStat support.

! src/share/vm/gc_implementation/shenandoah/shenandoahCollectorPolicy.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoahConcurrentThread.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoahHeap.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoahMonitoringSupport.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoahMonitoringSupport.hpp

Changeset: 0413fa7dedeb
Author:    rkennke
Date:      2015-11-12 21:35 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk8u/hotspot/rev/0413fa7dedeb

Don't replace C2 write barriers with constants.

! src/share/vm/opto/phaseX.cpp

Changeset: e56ca6ca84f7
Author:    rkennke
Date:      2015-11-12 21:35 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk8u/hotspot/rev/e56ca6ca84f7

Update refs in JNI weak references before processing them.

! src/share/vm/gc_implementation/shenandoah/shenandoahConcurrentMark.cpp


From roman at kennke.org  Thu Nov 26 21:38:50 2015
From: roman at kennke.org (roman at kennke.org)
Date: Thu, 26 Nov 2015 21:38:50 +0000
Subject: hg: shenandoah/jdk8u/hotspot: 5 new changesets
Message-ID: <201511262138.tAQLcoBu028052@aojmv0008.oracle.com>

Changeset: 02a5f971dcda
Author:    rkennke
Date:      2015-11-26 22:37 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk8u/hotspot/rev/02a5f971dcda

Added measurements of gross pause times.

! src/share/vm/gc_implementation/shenandoah/shenandoahCollectorPolicy.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoahCollectorPolicy.hpp
! src/share/vm/gc_implementation/shenandoah/shenandoahConcurrentThread.cpp

Changeset: 3badfa815b8e
Author:    rkennke
Date:      2015-11-26 22:37 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk8u/hotspot/rev/3badfa815b8e

Small build fix.

! src/share/vm/gc_implementation/shenandoah/shenandoahHeap.cpp

Changeset: 0a1c2db89784
Author:    rkennke
Date:      2015-11-26 22:37 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk8u/hotspot/rev/0a1c2db89784

Remove bogus safepoint synchronize code for Shenandoah.

! src/share/vm/gc_implementation/shenandoah/shenandoahConcurrentThread.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoahConcurrentThread.hpp
! src/share/vm/runtime/safepoint.cpp

Changeset: ee64ddc5460a
Author:    rkennke
Date:      2015-11-26 22:37 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk8u/hotspot/rev/ee64ddc5460a

Improve root scanning.

! src/share/vm/gc_implementation/shenandoah/shenandoahConcurrentMark.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoahHeap.hpp
! src/share/vm/gc_implementation/shenandoah/shenandoahHeap.inline.hpp
! src/share/vm/gc_implementation/shenandoah/shenandoahOopClosures.inline.hpp

Changeset: 6db5660c2a8e
Author:    rkennke
Date:      2015-11-26 22:37 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk8u/hotspot/rev/6db5660c2a8e

Fix scanning of regions when dead objects point to unloaded classes. Happens with concurrent class unloading.

! src/share/vm/gc_implementation/g1/concurrentMark.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoahHeap.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoahHeap.hpp
! src/share/vm/gc_implementation/shenandoah/shenandoahHeap.inline.hpp
! src/share/vm/gc_implementation/shenandoah/shenandoahHeapRegion.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoahHeapRegion.hpp
! src/share/vm/gc_implementation/shenandoah/shenandoahHeapRegionSet.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoahMarkCompact.cpp
! src/share/vm/gc_implementation/shenandoah/vm_operations_shenandoah.cpp
! src/share/vm/opto/shenandoahSupport.cpp
! src/share/vm/runtime/arguments.cpp