On Wed, 8 Nov 2023 23:23:48 GMT, Steve Dohrmann <d...@openjdk.org> 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 > longer needed and has been removed from this pull request. See comment > [here](https://github.com/openjdk/jdk/pull/16575#issuecomment-1820006548) for > updated performance data. > > 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) (sizeKind) Mode Cnt Score > Error Units > -------------------------------------------------------------------------------------- > XorTest.copy ELEMENTS SMALL avgt 30 584737355.767 ± > 60414308.540 ns/op > XorTest.copy ELEMENTS MEDIUM avgt 30 272248995.683 ± > 2924954.498 ns/op > XorTest.copy ELEMENTS LARGE avgt 30 1019200210.900 ± > 28334453.652 ns/op > XorTest.copy REGION SMALL avgt 30 7399944.164 ± > 216821.819 ns/op > XorTest.copy REGION MEDIUM avgt 30 20591454.558 ± > 147398.572 ns/op > XorTest.copy REGION LARGE avgt 30 21649266.051 ± > 179263.875 ns/op > XorTest.copy CRITICAL SMALL avgt 30 51079.357 ± > 542.482 ns/op > XorTest.copy CRITICAL MEDIUM avgt 30 2496.961 ± > 11.375 ns/op > XorTest.copy CRITICAL LARGE avgt 30 515.454 ± > 5.831 ns/op > XorTest.copy FOREIGN SMALL avgt 30 7558432.075 ± > 79489.276 ns/op > XorTest.copy FOREIGN MEDIUM avgt 30 19730666.341 ± > 500505.099 ns/op > XorTest.copy FOREIGN LARGE avgt 30 34616758.085 ± > 340300.726 ns/op > XorTest.xor ELEMENTS SMALL avgt 30 219832692.489 ± > 2329417.319 ns/op > XorTest.xor ELEMENTS MEDIUM avgt 30 505138197.167 ± > 3818334.424 ns/op > XorTest.xor ELEMENTS LARGE avgt 30 1189608474.667 ± > 5877981.900 ns/op > XorTest.xor REGION SMALL avgt 30 64093872.804 ± > 599704.491 ns/op > XorTest.xor REGION MEDIUM avgt 30 81544576.454 ± > 1406342.118 ns/op > XorTest.xor REGION LARGE avgt 30 90091424.883 ± > 775577.613 ns/op > XorTest.xor CRITICAL SMALL avgt 30 57231375.744 ± > 438223.342 ns/op > XorTest.x... This pull request has now been integrated. Changeset: 82967f45 Author: steveatgh <steve.dohrm...@intel.com> Committer: Sandhya Viswanathan <sviswanat...@openjdk.org> URL: https://git.openjdk.org/jdk/commit/82967f45db3b9555be03fcabdba380852ea21e2c Stats: 259 lines in 5 files changed: 259 ins; 0 del; 0 mod 8310159: Bulk copy with Unsafe::arrayCopy is slower compared to memcpy Co-authored-by: Maurizio Cimadamore <mcimadam...@openjdk.org> Reviewed-by: thartmann, jbhateja, sviswanathan ------------- PR: https://git.openjdk.org/jdk/pull/16575
