On Thu, 7 Nov 2024 17:25:40 GMT, Roman Kennke wrote:
>> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>>
>> It is also a follow-up to #20640, which now also includes (and supersedes)
>> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
>> previ
On Mon, 18 Nov 2024 14:36:17 GMT, Emanuel Peter wrote:
>> @eme64 Tbh I don't see how `AlignVector` can mitigate the issue if strict
>> alignment is required unless the object base is guaranteed to be aligned at
>> least as much as the vector length.
>
> @merykitty the object base is always at l
On Mon, 18 Nov 2024 15:00:51 GMT, Roman Kennke wrote:
>>> @rkennke It just will (silently) not vectorize, thus running slower but
>>> still correct.
>>
>> Ok, I think we can live with that for now.
>>
>> As said elsewhere, we are currently working on 4-byte-headers, which would
>> make that p
On Mon, 18 Nov 2024 15:30:14 GMT, Magnus Ihse Bursie wrote:
>> test/hotspot/jtreg/gtest/MetaspaceUtilsGtests.java line 1:
>>
>>
>> This file was reduced to empty but not actually deleted. Can you fix it
>> please.
>
> @rkennke Just making sure this is not being missed. Can you please open a JB
On Mon, 18 Nov 2024 15:20:17 GMT, Quan Anh Mai wrote:
>> @merykitty I guess we can always use
>> [vmovdqu](https://www.felixcloutier.com/x86/movdqu:vmovdqu8:vmovdqu16:vmovdqu32:vmovdqu64).
>>
>> And in fact that is exactly what we do:
>>
>> public class Test {
>> static int RANGE = 1024*10
On Mon, 18 Nov 2024 15:00:51 GMT, Roman Kennke wrote:
>>> @rkennke It just will (silently) not vectorize, thus running slower but
>>> still correct.
>>
>> Ok, I think we can live with that for now.
>>
>> As said elsewhere, we are currently working on 4-byte-headers, which would
>> make that p
On Thu, 7 Nov 2024 17:25:40 GMT, Roman Kennke wrote:
>> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>>
>> It is also a follow-up to #20640, which now also includes (and supersedes)
>> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
>> previ
On Mon, 18 Nov 2024 14:23:24 GMT, Roman Kennke wrote:
>>> @rkennke How important is the 4-byte saving on `byte, char, short, int,
>>> float` arrays? I'd assume they are not generally that small, at least a few
>>> elements? So could we make an exception, and have a `16-byte` offset to the
>>>
On Fri, 15 Nov 2024 04:49:51 GMT, David Holmes wrote:
>> Roman Kennke has updated the pull request with a new target base due to a
>> merge or a rebase. The pull request now contains 107 commits:
>>
>> - Merge branch 'master' into JDK-8305895-v4
>> - Merge tag 'jdk-25+23' into JDK-8305895-v4
On Mon, 18 Nov 2024 15:01:09 GMT, Emanuel Peter wrote:
>> @eme64 If you load a 32-byte (256-bit) vector, then the load is aligned if
>> the address is divisible by 32, otherwise the load is misaligned. That's why
>> [`vmovdqua`](https://www.felixcloutier.com/x86/movdqa:vmovdqa32:vmovdqa64)
>>
On Mon, 18 Nov 2024 14:34:13 GMT, Quan Anh Mai wrote:
>> @rkennke
>>> BTW, this problem is not specific to UseCompactObjectHeaders - I think the
>>> same problem would happen with -UseCompressedClassPointers. With
>>> uncompressed class-pointers, byte[] would start at offset 20, while long[]
>
On Mon, 18 Nov 2024 14:43:48 GMT, Quan Anh Mai wrote:
>> @merykitty
>>> Please correct me if I'm wrong but the issue is you need the base to be
>>> aligned at 32 bytes on AVX2 machines for any alignment for vector
>>> instruction to be meaningful, so I don't see the value of vector alignment
On Mon, 18 Nov 2024 14:35:41 GMT, Roman Kennke wrote:
>>> @rkennke Ok, fair enough. As far as I know, we at Oracle do not super care
>>> about strict alignment `AlignVector`. But maybe other people care, and have
>>> to make that tradeoff between vectorization and small object headers.
>>
>> B
On Mon, 18 Nov 2024 14:50:51 GMT, Quan Anh Mai wrote:
>> @merykitty In `AlignmentSolver::solve` /
>> `src/hotspot/share/opto/vectorization.cpp` you can see how I compute if
>> vectors can be aligned.
>
> @eme64 If you load a 32-byte (256-bit) vector, then the load is aligned if
> the address i
On Mon, 18 Nov 2024 14:35:41 GMT, Roman Kennke wrote:
>>> @rkennke Ok, fair enough. As far as I know, we at Oracle do not super care
>>> about strict alignment `AlignVector`. But maybe other people care, and have
>>> to make that tradeoff between vectorization and small object headers.
>>
>> B
On Mon, 18 Nov 2024 14:48:22 GMT, Emanuel Peter wrote:
>> @eme64 You will need the alignment for the whole vector (which means 32
>> bytes for a `ymm` load), not alignment only on its elements. Vector element
>> is the artefact of ALU units, not the load/store units that actually care
>> about
On Mon, 18 Nov 2024 14:41:25 GMT, Emanuel Peter wrote:
>> @eme64 Please correct me if I'm wrong but the issue is you need the base to
>> be aligned at 32 bytes on AVX2 machines for any alignment for vector
>> instruction to be meaningful, so I don't see the value of vector alignment
>> at all.
On Mon, 18 Nov 2024 14:23:24 GMT, Roman Kennke wrote:
>>> @rkennke How important is the 4-byte saving on `byte, char, short, int,
>>> float` arrays? I'd assume they are not generally that small, at least a few
>>> elements? So could we make an exception, and have a `16-byte` offset to the
>>>
On Mon, 18 Nov 2024 14:38:20 GMT, Quan Anh Mai wrote:
>> @merykitty the object base is always at least `8-byte` aligned, see
>> `ObjectAlignmentInBytes` - this also holds for all arrays. But the issue is
>> the offset from the object base to the array payload.
>>
>> @rkennke yes, working on fi
On Mon, 18 Nov 2024 14:31:52 GMT, Emanuel Peter wrote:
>>> @rkennke Ok, fair enough. As far as I know, we at Oracle do not super care
>>> about strict alignment `AlignVector`. But maybe other people care, and have
>>> to make that tradeoff between vectorization and small object headers.
>>
>>
On Mon, 18 Nov 2024 14:23:24 GMT, Roman Kennke wrote:
>>> @rkennke How important is the 4-byte saving on `byte, char, short, int,
>>> float` arrays? I'd assume they are not generally that small, at least a few
>>> elements? So could we make an exception, and have a `16-byte` offset to the
>>>
On Mon, 18 Nov 2024 14:13:17 GMT, Roman Kennke wrote:
>> @mur47x111 it's now intergrated in jdk24. do your magic in Graal ;-)
>
>> @rkennke How important is the 4-byte saving on `byte, char, short, int,
>> float` arrays? I'd assume they are not generally that small, at least a few
>> elements?
On Mon, 18 Nov 2024 14:13:17 GMT, Roman Kennke wrote:
>> @mur47x111 it's now intergrated in jdk24. do your magic in Graal ;-)
>
>> @rkennke How important is the 4-byte saving on `byte, char, short, int,
>> float` arrays? I'd assume they are not generally that small, at least a few
>> elements?
On Fri, 8 Nov 2024 17:42:24 GMT, Roman Kennke wrote:
>> Could you please cherry pick
>> https://github.com/mur47x111/jdk/commit/c45ebc2a89d0b25a3dd8cc46386e37a635ff9af2
>> for the JVMCI support?
>
> @mur47x111 it's now intergrated in jdk24. do your magic in Graal ;-)
> @rkennke How important i
On Fri, 8 Nov 2024 17:42:24 GMT, Roman Kennke wrote:
>> Could you please cherry pick
>> https://github.com/mur47x111/jdk/commit/c45ebc2a89d0b25a3dd8cc46386e37a635ff9af2
>> for the JVMCI support?
>
> @mur47x111 it's now intergrated in jdk24. do your magic in Graal ;-)
@rkennke How important is
On Fri, 8 Nov 2024 17:42:24 GMT, Roman Kennke wrote:
>> Could you please cherry pick
>> https://github.com/mur47x111/jdk/commit/c45ebc2a89d0b25a3dd8cc46386e37a635ff9af2
>> for the JVMCI support?
>
> @mur47x111 it's now intergrated in jdk24. do your magic in Graal ;-)
@rkennke I have now looked
On Thu, 7 Nov 2024 17:25:40 GMT, Roman Kennke wrote:
>> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>>
>> It is also a follow-up to #20640, which now also includes (and supersedes)
>> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
>> previ
On Thu, 7 Nov 2024 17:25:40 GMT, Roman Kennke wrote:
>> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>>
>> It is also a follow-up to #20640, which now also includes (and supersedes)
>> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
>> previ
On Wed, 18 Sep 2024 12:22:34 GMT, Yudi Zheng wrote:
>> Roman Kennke has updated the pull request incrementally with two additional
>> commits since the last revision:
>>
>> - CompressedKlassPointers::is_encodable shall be callable with -UseCCP
>> - Johan review feedback
>
> Could you please c
On Fri, 8 Nov 2024 17:42:24 GMT, Roman Kennke wrote:
>> Could you please cherry pick
>> https://github.com/mur47x111/jdk/commit/c45ebc2a89d0b25a3dd8cc46386e37a635ff9af2
>> for the JVMCI support?
>
> @mur47x111 it's now intergrated in jdk24. do your magic in Graal ;-)
@rkennke It is in the merg
On Thu, 7 Nov 2024 17:25:40 GMT, Roman Kennke wrote:
>> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>>
>> It is also a follow-up to #20640, which now also includes (and supersedes)
>> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
>> previ
On Thu, 7 Nov 2024 17:25:40 GMT, Roman Kennke wrote:
>> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>>
>> It is also a follow-up to #20640, which now also includes (and supersedes)
>> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
>> previ
On Thu, 7 Nov 2024 17:25:40 GMT, Roman Kennke wrote:
>> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>>
>> It is also a follow-up to #20640, which now also includes (and supersedes)
>> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
>> previ
On Thu, 7 Nov 2024 17:25:40 GMT, Roman Kennke wrote:
>> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>>
>> It is also a follow-up to #20640, which now also includes (and supersedes)
>> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
>> previ
On Thu, 7 Nov 2024 17:25:40 GMT, Roman Kennke wrote:
>> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>>
>> It is also a follow-up to #20640, which now also includes (and supersedes)
>> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
>> previ
On Thu, 7 Nov 2024 17:25:40 GMT, Roman Kennke wrote:
>> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>>
>> It is also a follow-up to #20640, which now also includes (and supersedes)
>> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
>> previ
On Thu, 7 Nov 2024 17:25:40 GMT, Roman Kennke wrote:
>> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>>
>> It is also a follow-up to #20640, which now also includes (and supersedes)
>> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
>> previ
On Thu, 7 Nov 2024 17:25:40 GMT, Roman Kennke wrote:
>> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>>
>> It is also a follow-up to #20640, which now also includes (and supersedes)
>> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
>> previ
> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>
> It is also a follow-up to #20640, which now also includes (and supersedes)
> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
> previously missing.
>
> Main changes:
> - Introduction of the (
On Thu, 7 Nov 2024 17:25:40 GMT, Roman Kennke wrote:
>> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>>
>> It is also a follow-up to #20640, which now also includes (and supersedes)
>> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
>> previ
> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>
> It is also a follow-up to #20640, which now also includes (and supersedes)
> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
> previously missing.
>
> Main changes:
> - Introduction of the (
On Tue, 5 Nov 2024 16:43:35 GMT, Roman Kennke wrote:
>> @egahlin / @mgronlun could you please review the JFR parts of this PR? One
>> change is for getting the right prototype header, the other is for avoiding
>> an endless loop/assert in a corner case.
>
>> @rkennke can you include this small
> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>
> It is also a follow-up to #20640, which now also includes (and supersedes)
> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
> previously missing.
>
> Main changes:
> - Introduction of the (
> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>
> It is also a follow-up to #20640, which now also includes (and supersedes)
> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
> previously missing.
>
> Main changes:
> - Introduction of the (
On Tue, 5 Nov 2024 16:43:35 GMT, Roman Kennke wrote:
>Hi Amit,
sorry I only now get to reply to this, I have been traveling. What does the
change do? Is it critical? Would it be possible to fix it after I intergrated
the JEP? Because any change that I do now invalidates existing reviews, and
m
On Tue, 22 Oct 2024 16:22:20 GMT, Roman Kennke wrote:
>> Roman Kennke has updated the pull request incrementally with two additional
>> commits since the last revision:
>>
>> - Update copyright
>> - Avoid assert/endless-loop in JFR code
>
> @egahlin / @mgronlun could you please review the JFR
On Thu, 24 Oct 2024 21:04:51 GMT, Roman Kennke wrote:
>> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>>
>> It is also a follow-up to #20640, which now also includes (and supersedes)
>> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
>> prev
On Tue, 22 Oct 2024 16:22:20 GMT, Roman Kennke wrote:
>> Roman Kennke has updated the pull request incrementally with two additional
>> commits since the last revision:
>>
>> - Update copyright
>> - Avoid assert/endless-loop in JFR code
>
> @egahlin / @mgronlun could you please review the JFR
On Thu, 24 Oct 2024 21:04:51 GMT, Roman Kennke wrote:
>> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>>
>> It is also a follow-up to #20640, which now also includes (and supersedes)
>> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
>> prev
On Thu, 24 Oct 2024 14:05:40 GMT, Roman Kennke wrote:
>> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>>
>> It is also a follow-up to #20640, which now also includes (and supersedes)
>> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
>> prev
On Thu, 24 Oct 2024 18:58:03 GMT, Hamlin Li wrote:
>> Roman Kennke has updated the pull request incrementally with one additional
>> commit since the last revision:
>>
>> Conditionalize platform specific parts of
>> CompressedClassPointersEncodingScheme test
>
> test/hotspot/jtreg/runtime/Co
> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>
> It is also a follow-up to #20640, which now also includes (and supersedes)
> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
> previously missing.
>
> Main changes:
> - Introduction of the (
> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>
> It is also a follow-up to #20640, which now also includes (and supersedes)
> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
> previously missing.
>
> Main changes:
> - Introduction of the (
> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>
> It is also a follow-up to #20640, which now also includes (and supersedes)
> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
> previously missing.
>
> Main changes:
> - Introduction of the (
On Tue, 22 Oct 2024 16:22:20 GMT, Roman Kennke wrote:
>> Roman Kennke has updated the pull request incrementally with two additional
>> commits since the last revision:
>>
>> - Update copyright
>> - Avoid assert/endless-loop in JFR code
>
> @egahlin / @mgronlun could you please review the JFR
On Thu, 24 Oct 2024 09:54:05 GMT, Martin Doerr wrote:
> As I understand the comment, it says alignment <= cache line size. But the
> implementation makes alignment >= cache line size. "hyper alignment" means
> alignment > cache line size?
Correct. since encoding range must cover the full klass
On Thu, 24 Oct 2024 09:28:13 GMT, Amit Kumar wrote:
>>> But then, what exactly is the error? If it's just the test assuming that
>>> cache line size is log 6, then the test should be fixed for ppc, not
>>> hotspot.
>>
>> that is the problem, test assumes log2 of 6 for chacheline size
>
> PPC l
On Thu, 24 Oct 2024 09:22:34 GMT, Thomas Stuefe wrote:
>>> This code causes test errors in
>>> `CompressedClassPointersEncodingScheme.java` on s390 and PPC64. It forces
>>> the shift to `log_cacheline` which is 7 on PPC64 and 9 on s390. The test
>>> passes when we remove "s > log_cacheline &&
On Thu, 24 Oct 2024 09:12:34 GMT, Thomas Stuefe wrote:
> But then, what exactly is the error? If it's just the test assuming that
> cache line size is log 6, then the test should be fixed for ppc, not hotspot.
that is the problem, test assumes log2 of 6 for chacheline size
-
PR Re
On Wed, 23 Oct 2024 18:14:50 GMT, Martin Doerr wrote:
> This code causes test errors in `CompressedClassPointersEncodingScheme.java`
> on s390 and PPC64. It forces the shift to `log_cacheline` which is 7 on PPC64
> and 9 on s390. The test passes when we remove "s > log_cacheline && " from
> th
On Fri, 30 Aug 2024 07:37:35 GMT, Thomas Stuefe wrote:
>> make/Images.gmk line 135:
>>
>>> 133: #
>>> 134: # Param1 - VM variant (e.g., server, client, zero, ...)
>>> 135: # Param2 - _nocoops, _coh, _nocoops_coh, or empty
>>
>> The -XX:+UseCompactObjectHeaders ssems to incompatible withe zero v
On Tue, 22 Oct 2024 16:19:24 GMT, Roman Kennke wrote:
>> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>>
>> It is also a follow-up to #20640, which now also includes (and supersedes)
>> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
>> prev
On Tue, 22 Oct 2024 16:22:20 GMT, Roman Kennke wrote:
> @egahlin / @mgronlun could you please review the JFR parts of this PR? One
> change is for getting the right prototype header, the other is for avoiding
> an endless loop/assert in a corner case.
JFR changes look reasonable.
On Tue, 22 Oct 2024 16:19:24 GMT, Roman Kennke wrote:
>> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>>
>> It is also a follow-up to #20640, which now also includes (and supersedes)
>> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
>> prev
On Tue, 22 Oct 2024 13:53:03 GMT, Thomas Stuefe wrote:
>> I will do some benchmarks
>
> I did SpecJBB runs with shift of 6, 8 and 10, respectively, which amounts to
> Klass alignment of 64, 256 and 1K. Benchmark scores did not show a
> significant pattern. I did not measure CPU stats though.
>
On Tue, 22 Oct 2024 16:19:24 GMT, Roman Kennke wrote:
>> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>>
>> It is also a follow-up to #20640, which now also includes (and supersedes)
>> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
>> prev
On Tue, 22 Oct 2024 16:19:24 GMT, Roman Kennke wrote:
>> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>>
>> It is also a follow-up to #20640, which now also includes (and supersedes)
>> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
>> prev
On Tue, 22 Oct 2024 16:19:24 GMT, Roman Kennke wrote:
>> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>>
>> It is also a follow-up to #20640, which now also includes (and supersedes)
>> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
>> prev
> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>
> It is also a follow-up to #20640, which now also includes (and supersedes)
> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
> previously missing.
>
> Main changes:
> - Introduction of the (
> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>
> It is also a follow-up to #20640, which now also includes (and supersedes)
> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
> previously missing.
>
> Main changes:
> - Introduction of the (
On Thu, 19 Sep 2024 13:34:47 GMT, Thomas Stuefe wrote:
>> Do you seen any effects of this in anything other than special-crafted micro
>> benchmarks? I wonder if it would be good enough to hard-code this to be 10
>> for the first integration of Lilliput.
>
> I will do some benchmarks
I did Spe
On Tue, 22 Oct 2024 11:19:19 GMT, Roman Kennke wrote:
>> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>>
>> It is also a follow-up to #20640, which now also includes (and supersedes)
>> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
>> prev
> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>
> It is also a follow-up to #20640, which now also includes (and supersedes)
> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
> previously missing.
>
> Main changes:
> - Introduction of the (
> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>
> It is also a follow-up to #20640, which now also includes (and supersedes)
> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
> previously missing.
>
> Main changes:
> - Introduction of the (
On Mon, 21 Oct 2024 20:31:28 GMT, Roman Kennke wrote:
>>> @rkennke Could you post the full command you used please? And perhaps also
>>> the seed that gets printed.. having trouble getting it to fail..
>>>
>>> So far I added a few options and perrmitations of:
>>> `./build/linux-x86_64-server-
On Mon, 21 Oct 2024 18:00:14 GMT, Roman Kennke wrote:
>>> I've managed to reproduce the ECoreIndexOf crash locally by running with
>>> -XX:+UseSerialGC -XX:+UnlockExperimentalVMOptions
>>> -XX:+UseCompactObjectHeaders. The crash happens on line 773 when reading
>>> past the needle.
>>>
>>> ``
On Mon, 21 Oct 2024 18:52:46 GMT, Volodymyr Paprotski wrote:
> Thanks @rkennke able to reproduce now.. Sandhya will have a patch soon and I
> will re-verify
@rkennke @vpaprotsk Please find attached the patch which should fix the problem.
[smallneedlefix.patch](https://github.com/user-attachmen
On Mon, 21 Oct 2024 18:00:14 GMT, Roman Kennke wrote:
>>> I've managed to reproduce the ECoreIndexOf crash locally by running with
>>> -XX:+UseSerialGC -XX:+UnlockExperimentalVMOptions
>>> -XX:+UseCompactObjectHeaders. The crash happens on line 773 when reading
>>> past the needle.
>>>
>>> ``
On Mon, 21 Oct 2024 13:53:58 GMT, Roman Kennke wrote:
>> Roman Kennke has updated the pull request incrementally with one additional
>> commit since the last revision:
>>
>> Compact header riscv (#3)
>>
>> Implement compact headers on RISCV
>> -
>>
>> Co-authored-by: hamli
On Mon, 21 Oct 2024 13:53:58 GMT, Roman Kennke wrote:
>> Roman Kennke has updated the pull request incrementally with one additional
>> commit since the last revision:
>>
>> Compact header riscv (#3)
>>
>> Implement compact headers on RISCV
>> -
>>
>> Co-authored-by: hamli
On Mon, 21 Oct 2024 13:53:58 GMT, Roman Kennke wrote:
>> Roman Kennke has updated the pull request incrementally with one additional
>> commit since the last revision:
>>
>> Compact header riscv (#3)
>>
>> Implement compact headers on RISCV
>> -
>>
>> Co-authored-by: hamli
On Thu, 17 Oct 2024 10:57:24 GMT, Roman Kennke wrote:
>> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>>
>> It is also a follow-up to #20640, which now also includes (and supersedes)
>> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
>> prev
On Thu, 17 Oct 2024 10:57:24 GMT, Roman Kennke wrote:
>> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>>
>> It is also a follow-up to #20640, which now also includes (and supersedes)
>> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
>> prev
On Thu, 17 Oct 2024 10:57:24 GMT, Roman Kennke wrote:
>> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>>
>> It is also a follow-up to #20640, which now also includes (and supersedes)
>> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
>> prev
On Thu, 17 Oct 2024 10:57:24 GMT, Roman Kennke wrote:
>> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>>
>> It is also a follow-up to #20640, which now also includes (and supersedes)
>> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
>> prev
On Wed, 16 Oct 2024 15:37:59 GMT, Coleen Phillimore wrote:
>> Roman Kennke has updated the pull request incrementally with one additional
>> commit since the last revision:
>>
>> Problem-list SharedBaseAddress tests on aarch64
>
> src/hotspot/share/oops/compressedKlass.cpp line 185:
>
>> 183
On Fri, 20 Sep 2024 17:46:21 GMT, Coleen Phillimore wrote:
>> Roman Kennke has updated the pull request incrementally with two additional
>> commits since the last revision:
>>
>> - Merge remote-tracking branch 'lilliput/JEP-450-temporary-fix-branch-2'
>> into JDK-8305895-v4
>> - review feed
On Thu, 17 Oct 2024 10:57:24 GMT, Roman Kennke wrote:
>> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>>
>> It is also a follow-up to #20640, which now also includes (and supersedes)
>> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
>> prev
On Thu, 17 Oct 2024 10:57:24 GMT, Roman Kennke wrote:
>> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>>
>> It is also a follow-up to #20640, which now also includes (and supersedes)
>> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
>> prev
On Thu, 17 Oct 2024 10:57:24 GMT, Roman Kennke wrote:
>> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>>
>> It is also a follow-up to #20640, which now also includes (and supersedes)
>> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
>> prev
> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>
> It is also a follow-up to #20640, which now also includes (and supersedes)
> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
> previously missing.
>
> Main changes:
> - Introduction of the (
On Wed, 16 Oct 2024 13:42:42 GMT, Roman Kennke wrote:
>> We're seeing failures in our nightly testing for tests
>> runtime/cds/appcds/SharedBaseAddress.java and
>> runtime/cds/SharedBaseAddress.java which I'm tracking in this bug
>> [JDK-8340212](https://bugs.openjdk.org/browse/JDK-8340212)
>>
On Wed, 16 Oct 2024 16:04:21 GMT, Roman Kennke wrote:
>> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>>
>> It is also a follow-up to #20640, which now also includes (and supersedes)
>> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
>> prev
> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>
> It is also a follow-up to #20640, which now also includes (and supersedes)
> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
> previously missing.
>
> Main changes:
> - Introduction of the (
On Wed, 16 Oct 2024 13:46:24 GMT, Roman Kennke wrote:
>> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>>
>> It is also a follow-up to #20640, which now also includes (and supersedes)
>> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
>> prev
On Wed, 16 Oct 2024 13:46:24 GMT, Roman Kennke wrote:
>> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>>
>> It is also a follow-up to #20640, which now also includes (and supersedes)
>> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
>> prev
> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>
> It is also a follow-up to #20640, which now also includes (and supersedes)
> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
> previously missing.
>
> Main changes:
> - Introduction of the (
On Wed, 16 Oct 2024 12:13:32 GMT, Coleen Phillimore wrote:
> We're seeing failures in our nightly testing for tests
> runtime/cds/appcds/SharedBaseAddress.java and
> runtime/cds/SharedBaseAddress.java which I'm tracking in this bug
> [JDK-8340212](https://bugs.openjdk.org/browse/JDK-8340212)
>
On Wed, 16 Oct 2024 09:31:12 GMT, Roman Kennke wrote:
>> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>>
>> It is also a follow-up to #20640, which now also includes (and supersedes)
>> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
>> prev
> This is the main body of the JEP 450: Compact Object Headers (Experimental).
>
> It is also a follow-up to #20640, which now also includes (and supersedes)
> #20603 and #20605, plus the Tiny Class-Pointers parts that have been
> previously missing.
>
> Main changes:
> - Introduction of the (
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