On Tue, 21 Nov 2023 21:03:20 GMT, Steve Dohrmann wrote:
>> Update: the XorTest::xor results shown in this message used test code from
>> PR commit 7cc272e862791 which was based on Maurizio Cimadamore's commit
>> a788f066af17. The XorTest has since been updated and XorTest::copy is no
>>
On Tue, 21 Nov 2023 21:03:20 GMT, Steve Dohrmann wrote:
>> Update: the XorTest::xor results shown in this message used test code from
>> PR commit 7cc272e862791 which was based on Maurizio Cimadamore's commit
>> a788f066af17. The XorTest has since been updated and XorTest::copy is no
>>
On Tue, 21 Nov 2023 01:14:49 GMT, Sandhya Viswanathan
wrote:
>> Steve Dohrmann has updated the pull request with a new target base due to a
>> merge or a rebase. The pull request now contains ten commits:
>>
>> - Merge branch 'master' into memcpy
>> - Update full name
>>Previous commit
> Update: the XorTest::xor results shown in this message used test code from PR
> commit 7cc272e862791 which was based on Maurizio Cimadamore's commit
> a788f066af17. The XorTest has since been updated and XorTest::copy is no
> longer needed and has been removed from this pull request. See
On Tue, 21 Nov 2023 01:10:40 GMT, Sandhya Viswanathan
wrote:
>> Steve Dohrmann has updated the pull request with a new target base due to a
>> merge or a rebase. The pull request now contains ten commits:
>>
>> - Merge branch 'master' into memcpy
>> - Update full name
>>Previous commit
On Mon, 20 Nov 2023 22:50:19 GMT, Steve Dohrmann wrote:
>> Update: the XorTest::xor results shown in this message used test code from
>> PR commit 7cc272e862791 which was based on Maurizio Cimadamore's commit
>> a788f066af17. The XorTest has since been updated and XorTest::copy is no
>>
On Mon, 20 Nov 2023 07:27:12 GMT, Tobias Hartmann wrote:
>> Steve Dohrmann has updated the pull request incrementally with one
>> additional commit since the last revision:
>>
>> - fix whitespace error
>
> test/micro/org/openjdk/bench/java/lang/foreign/xor/XorOp.java line 10:
>
>> 8:
On Mon, 20 Nov 2023 22:50:19 GMT, Steve Dohrmann wrote:
>> Update: the XorTest::xor results shown in this message used test code from
>> PR commit 7cc272e862791 which was based on Maurizio Cimadamore's commit
>> a788f066af17. The XorTest has since been updated and XorTest::copy is no
>>
> Below is baseline data collected using a modified version of the
> java.lang.foreign.xor micro benchmark referenced by @mcimadamore in the bug
> report. I collected data on an Ubuntu 22.04 laptop with a Tigerlake
> i7-1185G7, which does support AVX512.
>
> Baseline data
> Benchmark
On Thu, 16 Nov 2023 21:26:47 GMT, Steve Dohrmann wrote:
>> Below is baseline data collected using a modified version of the
>> java.lang.foreign.xor micro benchmark referenced by @mcimadamore in the bug
>> report. I collected data on an Ubuntu 22.04 laptop with a Tigerlake
>> i7-1185G7,
On Thu, 16 Nov 2023 21:26:47 GMT, Steve Dohrmann wrote:
>> Below is baseline data collected using a modified version of the
>> java.lang.foreign.xor micro benchmark referenced by @mcimadamore in the bug
>> report. I collected data on an Ubuntu 22.04 laptop with a Tigerlake
>> i7-1185G7,
On Thu, 16 Nov 2023 21:26:47 GMT, Steve Dohrmann wrote:
>> Below is baseline data collected using a modified version of the
>> java.lang.foreign.xor micro benchmark referenced by @mcimadamore in the bug
>> report. I collected data on an Ubuntu 22.04 laptop with a Tigerlake
>> i7-1185G7,
On Mon, 13 Nov 2023 08:36:44 GMT, Tobias Hartmann wrote:
>> Steve Dohrmann has updated the pull request incrementally with one
>> additional commit since the last revision:
>>
>> - fix whitespace error
>
> I submitted some quick testing and I'm seeing the following failure with
> multiple
On Thu, 16 Nov 2023 05:43:11 GMT, Jatin Bhateja wrote:
>> src/hotspot/cpu/x86/stubGenerator_x86_64_arraycopy.cpp line 585:
>>
>>> 583: __ shlq(temp2, shift);
>>> 584: __ cmpq(temp2, large_threshold);
>>> 585: __ jcc(Assembler::greaterEqual, L_copy_large);
>>
>> Hi @steveatgh , Can
> Below is baseline data collected using a modified version of the
> java.lang.foreign.xor micro benchmark referenced by @mcimadamore in the bug
> report. I collected data on an Ubuntu 22.04 laptop with a Tigerlake
> i7-1185G7, which does support AVX512.
>
> Baseline data
> Benchmark
> Below is baseline data collected using a modified version of the
> java.lang.foreign.xor micro benchmark referenced by @mcimadamore in the bug
> report. I collected data on an Ubuntu 22.04 laptop with a Tigerlake
> i7-1185G7, which does support AVX512.
>
> Baseline data
> Benchmark
> Below is baseline data collected using a modified version of the
> java.lang.foreign.xor micro benchmark referenced by @mcimadamore in the bug
> report. I collected data on an Ubuntu 22.04 laptop with a Tigerlake
> i7-1185G7, which does support AVX512.
>
> Baseline data
> Benchmark
On Thu, 16 Nov 2023 09:49:00 GMT, Andrew Haley wrote:
>> Thanks for the clarification, agree behavior is similar to non-NT case, in
>> fact using NT for huge copy operations will prevent polluting caches due to
>> destination cache line fills.
>
> But won't it also cause performance
On Thu, 16 Nov 2023 05:38:30 GMT, Jatin Bhateja wrote:
>> The results a concurrent reader sees could be different if the copy is using
>> nt writes, but if the read of the destination is not synced with the copy
>> operation, I think the reader would not see consistent state in either case.
On Wed, 15 Nov 2023 17:03:38 GMT, Steve Dohrmann wrote:
>> Do you see any concerns while handling multithreaded case where writer is
>> busy copying 256 bytes block in loop and reader try to access a location
>> still not flushed out of write combining buffer.
>
> The results a concurrent
On Tue, 14 Nov 2023 07:59:22 GMT, Jatin Bhateja wrote:
>> Below is baseline data collected using a modified version of the
>> java.lang.foreign.xor micro benchmark referenced by @mcimadamore in the bug
>> report. I collected data on an Ubuntu 22.04 laptop with a Tigerlake
>> i7-1185G7,
On Wed, 15 Nov 2023 01:44:56 GMT, Jatin Bhateja wrote:
>> Thanks, there is an store fence upon completion of the main loop for the
>> large size code:
>>
>> 
>
> Do you see any concerns while handling
On Wed, 15 Nov 2023 01:17:05 GMT, Steve Dohrmann wrote:
>> @jatin-bhateja There is a sfence at line 781.
>
> Thanks, there is an store fence upon completion of the main loop for the
> large size code:
>
>
On Wed, 15 Nov 2023 00:39:29 GMT, Sandhya Viswanathan
wrote:
>> src/hotspot/cpu/x86/stubGenerator_x86_64_arraycopy.cpp line 1186:
>>
>>> 1184: __ evmovntdquq(Address(dst, index, scale, offset + 0x40), xmm2,
>>> Assembler::AVX_512bit);
>>> 1185: __ evmovntdquq(Address(dst, index,
On Tue, 14 Nov 2023 08:00:13 GMT, Jatin Bhateja wrote:
>> Below is baseline data collected using a modified version of the
>> java.lang.foreign.xor micro benchmark referenced by @mcimadamore in the bug
>> report. I collected data on an Ubuntu 22.04 laptop with a Tigerlake
>> i7-1185G7,
On Tue, 14 Nov 2023 08:09:28 GMT, Jatin Bhateja wrote:
>> Below is baseline data collected using a modified version of the
>> java.lang.foreign.xor micro benchmark referenced by @mcimadamore in the bug
>> report. I collected data on an Ubuntu 22.04 laptop with a Tigerlake
>> i7-1185G7,
On Wed, 8 Nov 2023 23:23:48 GMT, Steve Dohrmann wrote:
> Below is baseline data collected using a modified version of the
> java.lang.foreign.xor micro benchmark referenced by @mcimadamore in the bug
> report. I collected data on an Ubuntu 22.04 laptop with a Tigerlake
> i7-1185G7, which
On Wed, 8 Nov 2023 23:23:48 GMT, Steve Dohrmann wrote:
> Below is baseline data collected using a modified version of the
> java.lang.foreign.xor micro benchmark referenced by @mcimadamore in the bug
> report. I collected data on an Ubuntu 22.04 laptop with a Tigerlake
> i7-1185G7, which
On Mon, 13 Nov 2023 08:36:44 GMT, Tobias Hartmann wrote:
>> Below is baseline data collected using a modified version of the
>> java.lang.foreign.xor micro benchmark referenced by @mcimadamore in the bug
>> report. I collected data on an Ubuntu 22.04 laptop with a Tigerlake
>> i7-1185G7,
On Wed, 8 Nov 2023 23:23:48 GMT, Steve Dohrmann wrote:
> Below is baseline data collected using a modified version of the
> java.lang.foreign.xor micro benchmark referenced by @mcimadamore in the bug
> report. I collected data on an Ubuntu 22.04 laptop with a Tigerlake
> i7-1185G7, which
On Wed, 8 Nov 2023 23:23:48 GMT, Steve Dohrmann wrote:
> Below is baseline data collected using a modified version of the
> java.lang.foreign.xor micro benchmark referenced by @mcimadamore in the bug
> report. I collected data on an Ubuntu 22.04 laptop with a Tigerlake
> i7-1185G7, which
Below is baseline data collected using a modified version of the
java.lang.foreign.xor micro benchmark referenced by @mcimadamore in the bug
report. I collected data on an Ubuntu 22.04 laptop with a Tigerlake i7-1185G7,
which does support AVX512.
Baseline data
Benchmark (arrayKind)
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